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As filed with the Securities and Exchange Commission on November 8, 2005
Registration No. 333-            
 
 
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
FORM S-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
 
MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(Exact name of registrant as specified in its charter)
         
Massachusetts   2834   04-3412465
(State or other jurisdiction of
incorporation or organization)
  (Primary Standard Industrial
Classification Code Number)
  (I.R.S. Employer
Identification No.)
 
160 Second Street
Cambridge, Massachusetts 02142
(617) 492-5554
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)
 
David S. Barlow
Chairman
160 Second Street
Cambridge, Massachusetts 02142
(617) 492-5554
(Name, address, including zip code, and telephone number, including area code, of agent for service)
 
Copies to:
     
Gabor Garai
David W. Kantaros
Foley & Lardner LLP
111 Huntington Avenue
Boston, Massachusetts 02199
(617) 342-4000
(617) 342-4001 — Fax
  David K. Boston
Willkie Farr & Gallagher LLP
787 Seventh Avenue
New York, New York 10019
(212) 728-8000
(212) 728-8111 — Fax
 
     Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this Registration Statement.
    If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box.     o
    If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.     o                               
    If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.     o                               
    If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.     o                               
    If delivery of the prospectus is expected to be made pursuant to Rule 434, check the following box.     o
CALCULATION OF REGISTRATION FEE
               
               
               
Title of each class of     Proposed maximum     Amount of  
securities to be registered     aggregate offering price (1)     registration fee  
               
 Common Stock, par value $0.01 per share
    $57,500,000     $6,768  
               
(1)  Estimated solely for the purpose of calculating the registration fee pursuant to Section 6(b) and Rule 457(o) of the Securities Act of 1933.
 
The Registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.
 
 


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The information contained in this prospectus is not complete and may be changed. We may not sell these securities until the Securities and Exchange Commission declares our registration statement effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to Completion, dated November 8, 2005
                             Shares
MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(MOLECULARINSIGHT PHARMACEUTICALS LOGO)
Common Stock
$               per share
 
•  Molecular Insight Pharmaceuticals, Inc. is offering                     shares of common stock.
 
•  We anticipate that the initial public offering price will be between $          and $           per share.
 
•  This is our initial public offering and no public market currently exists for our common stock.
 
•  Proposed trading symbol: Nasdaq National Market — MIPI.
 
This investment involves risk. See “Risk Factors” beginning on page 8.
 
 
                 
    Per Share   Total
         
Initial public offering price
  $       $    
Underwriting discount
  $       $    
Proceeds, before expenses, to Molecular Insight Pharmaceuticals, Inc. 
  $       $    
 
 
The underwriters have a 30-day option to purchase up to                     additional shares of common stock from us to cover over-allotments, if any.
Neither the Securities and Exchange Commission nor any state securities commission has approved of anyone’s investment in these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense .
Piper Jaffray SG Cowen & Co.
Oppenheimer & Co. Roth Capital Partners, LLC
The date of this prospectus is         ,      


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    F-1  
  EX-10.1 Unit Purchase Agreement
  EX-10.2 Stock Purchase Agreement
  EX-10.3 Amended and Restated Voting Agreement
  EX-10.4 Investor Rights Agreement
  EX-10.5 Registration Rights Agreement
  EX-10.6 Lease Agreement
  EX-10.7 Employment Agreement John Babich
  EX-10.8 Employment Agreement David Barlow
  EX-10.9 Employment Agreement John McCray
  EX-10.10 Employment Agreement Nicholas Borys
  EX-10.11 Employment Agreement 7/1/2005
  EX-10.12 License Agreement 10/25/1999
  EX-10.13 Development, manufacturing and Supply Agreement 5/14/2004
  EX-10.14 Exclusive License Agreement 12/29/1997
  EX-10.15 Executive License Agreement 3/1/2000
  EX-10.16 License Agreement 12/15/2000
  EX-10.17 License Agreement 9/5/2003
  EX-10.18 1997 Stock Option Plan
  Ex-23.1 Consent of Deloitte and Touche LLP
 
You should rely only on the information contained in the prospectus. We have not, and the underwriters have not, authorized any other person to provide you with different information. This prospectus is not an offer to sell, nor is it seeking an offer to buy, these securities in any state where the offer or solicitation is not permitted. The information in this prospectus is complete and accurate as of the date on the front cover, but the information may have changed since that date.
We currently use Molecular Insight tm and the Molecular Insight logo as trademarks in the United States and other countries. We have sought U.S. trademark registration for Molecular Insight tm and plan to seek similar protection for this mark outside the United States. We have also filed intent to use registrations with the United States Patent and Trademark Office for the trademarks Ultratrace tm , Zemiva tm and Velepin tm and plan to seek similar protection for these marks outside the United States. We use SAAC tm , SAACQ tm and Nanotrace tm Discovery as trademarks in the United States and other countries, and are exploring the applicability of U.S. and foreign registration for these trademarks. All other trademarks, trade names or services marks appearing in this prospectus belong to their respective holders.

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PROSPECTUS SUMMARY
The following summary is qualified in its entirety by, and should be read together with, the more detailed information and financial statements and related notes thereto appearing elsewhere in this prospectus. Before you decide to invest in our common stock, you should read the entire prospectus carefully, including the risk factors and the financial statements and related notes included in this prospectus.
Our Business
We are a biopharmaceutical company focused on the research, development and commercialization of innovative molecular imaging pharmaceuticals and targeted radiotherapeutics. Our product candidates target markets with significant unmet needs in the areas of cardiology, oncology and neurology. We believe that our product candidates offer significant benefits to patients, healthcare providers and third-party payers by enabling improved diagnosis, treatment and management of disease in a more cost-effective manner.
Our lead product candidate, Zemiva (iodofiltic acid I 123), is a radiolabeled fatty acid analog that we are developing as a molecular imaging pharmaceutical for the diagnosis of insufficient blood flow to the heart, or cardiac ischemia. We believe that Zemiva enables improved diagnosis and management of disease in a more cost-effective and expeditious manner and has significant advantages over the current standard of care in both the emergency department and non-acute settings. We have recently completed a Phase 2b clinical trial for Zemiva. In this clinical trial, we evaluated the safety and efficacy of Zemiva and initial findings suggest that Zemiva has the ability to detect areas of cardiac ischemia with results generally consistent with the current standard of care. Moreover, Zemiva appeared to have significant predictive value in ruling out cases in which cardiac ischemia was not present. We believe that these findings support our decision to advance Zemiva into Phase 3 development and we intend to commence a Phase 3 clinical trial for Zemiva in the first half of 2006.
Market Opportunity
The initial target market for Zemiva is for the diagnosis of cardiac ischemia in the emergency department setting. In the United States, approximately five to eight million chest pain patients present to emergency departments each year requiring a determination of whether the chest pain is caused by cardiac ischemia or myocardial infarction (heart attack). Of these chest pain patients, over three million are admitted to the hospital to achieve diagnosis, of which only approximately 15% are ultimately diagnosed with acute coronary syndrome, or ACS, an umbrella term which refers to both cardiac ischemia and myocardial infarction. Moreover, the current standard of care to detect ACS results in a high rate of “missed” diagnoses. Of the approximately 25% of patients with chest pain who are discharged from the emergency department having not been diagnosed with ACS or admitted for further assessment, 1% to 5% actually have ACS. We believe these statistics highlight a significant opportunity to reduce hospitalizations and expenses to the healthcare system through improved diagnostic techniques.
Unnecessary hospitalizations and “missed” diagnoses are costly in many ways. The current standard of care to detect ACS results in an estimated $3 to $6 billion per year in inpatient expenses that we believe could be avoided with an improved diagnostic. The complications in discharged patients whose ACS is “missed” account for approximately 20% of malpractice awards against emergency department physicians even though patients with chest pain comprise approximately 6% of a typical emergency physician’s practice. Therefore, we believe there is a substantial unmet need for improved diagnosis of ACS, and thus cardiac ischemia, in emergency department settings.
A second target market for Zemiva is for the diagnosis of coronary disease in the non-acute setting. The non-acute setting is principally defined as scheduled cardiac stress tests performed in hospitals and outpatient clinics with cardiac practices. In 2002, over nine million nuclear stress tests were performed

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in the United States to evaluate cardiac ischemia. While stress tests are generally effective in terms of diagnosis, the manner in which they are conducted is inconvenient, time consuming and expensive because of the inherent limitations of current imaging agents. As a result, we believe there is a substantial unmet need for an improved imaging agent that will shorten the time required to perform stress tests, which typically amounts to 3 to 4 hours and up to 24 hours in certain cases. By reducing this period, we believe that patient convenience and throughput will be increased and overall costs will be reduced.
Our Lead Product Candidate
Zemiva is a radiolabeled fatty acid analog that is also known as BMIPP. This molecule has been sold in Japan under the name Cardiodine in the non-acute setting for over ten years and, to our knowledge, no significant safety events have been reported. Cardiodine has been used in over 500,000 patients and has been the subject of over 200 peer-reviewed articles.
We believe that Zemiva offers significant advantages over the current standard of care with respect to the diagnosis of cardiac ischemia in both the emergency department and non-acute settings:
  •  Emergency Department. We believe that our clinical data show that Zemiva enables the detection of cardiac ischemia up to 30 hours following an ischemic episode. Currently available imaging agents are only effective when used during ongoing symptoms or within two hours after cessation of symptoms. After this period, a time consuming and expensive series of diagnostic tests is required, including a stress test after the patient has been stabilized. As a result of Zemiva’s extended “imaging window,” we believe that Zemiva will offer more timely, convenient and cost effective diagnosis when compared with the current standard of care.
 
  •  Non-Acute Setting. Utilizing Zemiva, we believe a stress test will require approximately one hour. With currently available imaging agents such as Cardiolite and Myoview, stress tests typically require 3 to 4 hours, and may require up to 24 hours in certain cases. By reducing the time required for a stress test, we believe that Zemiva will offer increased patient throughput and convenience at a lower overall cost to the healthcare system.
We have completed three clinical studies with Zemiva, including two multi-center Phase 2 studies and a Phase 1 study at Massachusetts General Hospital. Data from these studies have been presented at leading scientific forums and we believe that these data have supported the safety and efficacy of Zemiva.
Results from our Phase 2a trial were published recently in the peer-reviewed journal Circulation and cited at the annual American Society of Nuclear Cardiology meeting. We believe the data demonstrate that Zemiva administered to resting patients with cardiac ischemia safely detects an ischemic event up to 30 hours after the event occurred, without the use of a stress test.
In March 2005, we completed enrollment of 105 patients in our multi-center Phase 2b clinical trial of Zemiva. This trial was designed to evaluate the safety and feasibility of Zemiva for the detection of cardiac ischemia in patients with suspected ACS whose symptoms occurred within 30 hours prior to Zemiva injection. The objectives of the study were to evaluate: 1) the performance characteristics (accuracy, sensitivity, specificity, positive predictive value and negative predictive value) of Zemiva imaging for detection/exclusion of ACS; and 2) the safety of a single injection of Zemiva in patients suspected of ACS. The study was designed as an open-label Phase 2 study that recruited high-likelihood and intermediate- to low-likelihood ACS patients. Patients were imaged with Zemiva for the presence or absence of altered fatty acid metabolism due to cardiac ischemia.
Preliminary findings of this study suggest that Zemiva demonstrates the ability to detect areas of cardiac ischemia with results generally consistent with traditional diagnostic techniques, including those requiring a substantially greater time investment. Preliminary analysis also suggests that there is a high

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negative predictive value when Zemiva is administered to patients at rest. We expect the findings of this study to support the decision to continue evaluation of the safety and efficacy of Zemiva in Phase 3 clinical research.
We anticipate that our Phase 3 clinical trial for Zemiva will include 450 patients at 20 centers in North America, with a possible Phase 4 follow-up requirement. We intend to commence this clinical trial in the first half of 2006. The final protocol design and the timing of commencement will depend on the further analysis of the results from our Phase 2b trial data and input from the Food and Drug Administration, or FDA.
We also expect to begin a Phase 2 clinical trial to develop our own reference database of normal images for myocardial SPECT imaging, or a Normals database, in the first half of 2006. A Normals database is a valuable tool for the physician interpreting the cardiac image, regardless of whether the study is read by a nuclear cardiologist, nuclear medicine physician or nuclear radiologist. Such a database enables the interpreting physician to compare a patient’s cardiac image against that of a “normal” image as defined by computer-compiled data. Consistent with this standard practice, we intend to conduct a Phase 2 clinical trial to develop our own Normals database that will be used as part of our Phase 3 clinical trial and in the commercialization of Zemiva, if approved by the FDA or comparable regulatory bodies outside the United States. This trial is expected to include approximately 120 patients.
Other Product Candidates
In addition to Zemiva, we are developing a portfolio of product candidates for cardiovascular molecular imaging as well as for oncological molecular imaging and targeted radiotherapy using our proprietary technologies. Applied independently and in combination, these technologies enable the development of novel molecular imaging pharmaceuticals and targeted radiotherapeutics using both small molecule and protein-based agents.
Ultratrace MIBG, for example, is our targeted radiotherapeutic candidate for cancer, which we believe may improve the diagnosis, treatment and monitoring of neuroendocrine tumors such as neuroblastoma, pheochromocytoma and carcinoid. We expect to enter clinical studies in the first half of 2006 in patients with neuroendocrine tumors. In addition, we are developing several preclinical product candidates that address large unmet medical needs in the areas of prostate cancer, tumor angiogenesis and heart failure.
Our Business Strategy
We intend to become a leader in the research, development and commercialization of innovative molecular imaging pharmaceuticals and targeted radiotherapeutics that improve patient diagnosis and care. Our strategy is to build our product portfolio in each of these areas through our internal research efforts, use of our proprietary technologies and by acquiring or in-licensing complementary products and technologies. We plan to take the following steps to implement our strategy:
  •  Seek regulatory approval of Zemiva for the diagnosis of cardiac ischemia in the emergency department setting;
 
  •  Develop our own specialty sales and marketing team to market Zemiva in the United States following regulatory approval and establish strategic collaborations to market Zemiva outside the United States;
 
  •  Expand the indications for which Zemiva may be used, beginning with indications in the non-acute setting;
 
  •  Advance Ultratrace MIBG into clinical trials for the detection and treatment of neuroendocrine tumors;

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  •  Advance the development of our preclinical product candidates; and
 
  •  Expand our product pipeline through our proprietary platform technologies, acquisitions and strategic licensing arrangements.
Corporate Information
We were incorporated in the Commonwealth of Massachusetts in 1997 under the name Imaging Biopharmaceuticals, Inc. and subsequently changed our name to Biostream, Inc. in 1998, and subsequently changed our name again to Molecular Insight Pharmaceuticals, Inc. in 2003. Our principal executive offices are located at 160 Second Street, Cambridge, Massachusetts, 02142, and our telephone number is (617) 492-5554. Our Internet site address is www.molecularinsight.com. Any information that is included on or linked to our Internet site is not a part of this prospectus.
In this prospectus, unless otherwise stated or the context otherwise requires, references to “Molecular Insight,” “MIP,” “we,” “us,” “our,” “the Company” and similar references refer to Molecular Insight Pharmaceuticals, Inc. and its subsidiaries.
All references to years in this prospectus, unless otherwise noted, refer to our fiscal years, which end on December 31. For example, a reference to “2004” or “fiscal 2004” means the twelve-month period that ended December 31, 2004.

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The Offering
Common stock offered by us                     shares
 
Common stock to be outstanding after the offering                     shares
 
Initial public offering price $           per share
 
Use of proceeds We intend to use the net proceeds of this offering to continue the development and preparation for the commercialization of our lead molecular imaging pharmaceutical candidate, Zemiva; to initiate and expand the clinical development of Ultratrace MIBG, our lead targeted radiotherapeutic candidate for cancer; and for other working capital and general corporate activities. See “Use of Proceeds.”
 
Cash dividend to be paid in connection with the offering Contingent upon the closing of this offering, we intend to pay to certain existing preferred stockholders a cash dividend in an aggregate amount of $          . Purchasers of our common stock in this offering will not be entitled to receive any portion of this dividend.
 
Proposed Nasdaq National Market symbol MIPI
The number of shares of common stock that will be outstanding immediately after this offering is based on                      shares of common stock outstanding as of                           , 2005. The number of shares of common stock to be outstanding after this offering assumes the automatic conversion, upon the completion of this offering, of all shares of our preferred stock outstanding as of                           , 2005 into an aggregate of                      shares of our common stock and                      shares of common stock issuable upon the exercise of common stock warrants outstanding as of                           , 2005 that will expire on or prior to the completion of this offering.
The number of shares of common stock to be outstanding after this offering excludes the following shares:
  •                       shares of common stock issuable upon the exercise of stock options outstanding as of                           , 2005, of which                     options having a weighted-average exercise price of $           per share were exercisable as of                           , 2005; and
 
  •                       shares of common stock available for future grants under our 2005 Equity Incentive Plan.
In addition, unless otherwise indicated, all information in this prospectus assumes:
  •  a 1-for-                    reverse split of our common stock to be effected before the completion of this offering; and
 
  •  no exercise of the underwriters’ over-allotment option.

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Summary Consolidated Financial Data
The summary consolidated financial data set forth below should be read in conjunction with our consolidated financial statements and related notes thereto and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this prospectus. The summary consolidated statements of operations data for the years ended December 31, 2002, 2003 and 2004 are derived from our audited consolidated financial statements included elsewhere in this prospectus. The summary consolidated statements of operations data for the six months ended June 30, 2004 and 2005, and the summary consolidated balance sheet data as of June 30, 2005, are derived from our unaudited consolidated financial statements included elsewhere in this prospectus. The selected pro forma consolidated balance sheet data as of June 30, 2005 is derived from unaudited pro forma consolidated financial statements not included in this prospectus. The historical results are not necessarily indicative of results to be expected in any future period.
                                             
        Six Months Ended
    Year Ended December 31,   June 30,
         
    2002   2003   2004   2004   2005
                     
    (in thousands, except per share data)
Consolidated Statements of Operations Data:
                                       
Research and development grant revenue
  $ 624     $ 723     $ 569     $ 248     $ 427  
Operating expenses:
                                       
 
Research and development
    2,317       2,774       5,381       1,988       3,990  
 
General and administrative
    1,562       1,266       3,520       1,525       3,042  
 
Amortization of licensed patent rights
    3,798                          
                               
   
Total operating expenses
    7,677       4,040       8,901       3,513       7,032  
                               
Loss from operations
    (7,053 )     (3,317 )     (8,332 )     (3,265 )     (6,605 )
                               
Other (expense) income
                                       
 
Interest income
    3       1       20       11       133  
 
Interest expense
    (6 )     (3 )     (3 )     (1 )     (7 )
 
Interest expense — related parties
    (28 )     (29 )                  
                               
   
Total other (expense) income, net
    (31 )     (31 )     17       10       126  
                               
Net loss
    (7,084 )     (3,348 )     (8,315 )     (3,255 )     (6,479 )
Redeemable convertible preferred stock dividends and accretion of issuance costs
          (613 )     (1,312 )     (638 )     (1,710 )
                               
Net loss attributable to common stockholders
  $ (7,084 )   $ (3,961 )   $ (9,627 )   $ (3,893 )   $ (8,189 )
                               
Net loss per share attributable to common stockholders — basic and diluted
  $ (0.63 )   $ (0.19 )   $ (0.43 )   $ (0.18 )   $ (0.33 )
                               
Weighted average shares used to compute basic and diluted net loss per share attributable to common stockholders
    11,275       21,090       22,641       21,981       25,039  
                               
 
Pro forma net loss per common share — basic and diluted
                  $ (     )           $ (     )
                               
 
Shares used in computing pro forma net loss per common share — basic and diluted
                                       
                               

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    As of June 30, 2005
     
        Pro Forma
    Actual   Pro Forma (1)   As Adjusted (2)
             
    (in thousands)
Consolidated Balance Sheet Data:
                       
Cash and cash equivalents
  $ 21,153                  
Working capital
    19,148                  
Total assets
    21,912                  
Long-term obligations, net of current portion
    90                  
Redeemable convertible preferred stock
    43,809                  
Total stockholders (deficit) equity
    (24,361 )                
 
(1) On a pro forma basis to give effect to (i) the conversion of all of our shares of preferred stock outstanding as of June 30, 2005 into                  shares of common stock upon the completion of this offering, (ii) the payment to certain preferred stockholders of a cash dividend in an aggregate amount of $        , (iii) the election of certain preferred stockholders to receive in the aggregate                  shares of common stock in lieu of a cash dividend and (iv) the exercise of warrants outstanding as of June 30, 2005 that will expire on or prior to the completion of this offering for                  shares of common stock.
 
(2) On a pro forma as adjusted basis to give effect to the sale of all of the shares of common stock in this offering at an assumed public offering price of $         per share (the midpoint of the expected price range), after deducting estimated underwriting discounts and commissions and our estimated offering expenses.

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RISK FACTORS
Investing in our common stock involves a high degree of risk. You should carefully consider the risks described below with all of the other information included in this prospectus before making an investment decision. If any of the possible adverse events described below actually occurs, our business, results of operations or financial condition would likely suffer. In such an event, the market price of our common stock could decline and you could lose all or part of your investment. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business.
Risks Related to Our Product Candidates and Operations
We are largely dependent on the success of our lead product candidate, Zemiva, and we may not be able to successfully commercialize this potential product.
We have incurred and will continue to incur significant costs relating to the development and marketing of our lead product candidate, Zemiva. We have not obtained approval to market this potential product in any jurisdiction and we may never be able to obtain approval or, if approvals are obtained, to commercialize Zemiva successfully. If we fail to successfully commercialize Zemiva, we may be unable to generate sufficient revenue to sustain and grow our business, and our business, financial condition and results of operations will be adversely affected.
We have only recently begun to direct significant efforts toward the expansion of our scientific staff and research capabilities to identify and develop product candidates in addition to Zemiva. We do not know whether our planned preclinical development or clinical trials for these other product candidates will begin on time or be completed on schedule, if at all. In addition, we do not know whether any of our clinical trials will result in marketable products. We do not anticipate that any additional product candidates will reach the market for at least several years, if at all.
If we fail to obtain regulatory approval of Zemiva, or any of our other current or future product candidates, we will be unable to commercialize these potential products in the United States.
The development, testing, manufacturing and marketing of our product candidates are subject to extensive regulation by governmental authorities in the United States. In particular, the process of obtaining FDA approval is costly and time consuming, and the time required for such approval is uncertain. Our product candidates must undergo rigorous preclinical and clinical testing and an extensive regulatory approval process mandated by the FDA. Such regulatory review includes the determination of manufacturing capability and product performance. Generally, only a small percentage of pharmaceutical products are ultimately approved for commercial sale.
We can give no assurance that our current or future product candidates will be approved by the FDA or any other governmental body. In addition, there can be no assurance that all necessary approvals will be granted for future product candidates or that FDA review or actions will not involve delays caused by the FDA’s request for additional information or testing that could adversely affect the time to market for and sale of our product candidates. Further failure to comply with applicable regulatory requirements can, among other things, result in the suspension of regulatory approval as well as possible civil and criminal sanctions.
Failure to enroll patients in our clinical trials may cause delays in developing Zemiva or any of our other current or future product candidates.
We may encounter delays in the development and commercialization, or fail to obtain marketing approval, of Zemiva or any other future product candidate if we are unable to enroll enough patients to complete clinical trials. Our ability to enroll sufficient numbers of patients in our clinical trials depends on many factors, including the severity of illness of the population, the size of the patient

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population, the nature of the clinical protocol, the proximity of patients to clinical sites, the eligibility criteria for the trial and competing clinical trials. Delays in planned patient enrollment may result in increased costs and harm our ability to complete our clinical trials and obtain regulatory approval.
Delays in clinical testing could result in increased costs to us and delay our ability to generate revenue.
Significant delays in clinical testing could materially impact our product development costs. We currently expect that, following this offering and based on our current expected clinical protocols, we will expend at least $10 million in connection with additional clinical trials for Zemiva. We do not know whether planned clinical trials will begin on time, will need to be restructured or will be completed on schedule, if at all. Clinical trials can be delayed for a variety of reasons, including delays in obtaining regulatory approval to commence and continue a study, delays in reaching agreement on acceptable clinical study terms with prospective sites, delays in obtaining institutional review board approval to conduct a study at a prospective site and delays in recruiting patients to participate in a study.
In addition, we typically rely on third-party clinical investigators to conduct our clinical trials and other third-party organizations to oversee the operations of these clinical trials and to perform data collection and analysis. As a result, we may face additional delays outside of our control if these parties do not perform their obligations in a timely fashion. Significant delays in testing or regulatory approvals for any of our current or future product candidates, including Zemiva, could prevent or cause delays in the commercialization of such product candidates, reduce potential revenues from the sale of such product candidates and cause our costs to increase.
Our clinical trials for any of our current or future product candidates may produce negative or inconclusive results and we may decide, or regulators may require us, to conduct additional clinical and/or preclinical testing for these product candidates or cease our trials.
We will only receive regulatory approval to commercialize a product candidate if we can demonstrate to the satisfaction of the FDA, or the applicable foreign regulatory agency, that the product candidate is safe and effective. We have recently completed a Phase 2b clinical trial for Zemiva and are currently planning a Phase 3 clinical trial for Zemiva. In addition, we intend to commence a Phase 1 clinical trial for Ultratrace MIBG in calendar year 2006. We do not know whether our existing or future clinical trials will demonstrate safety and efficacy sufficiently to result in marketable products. Because our clinical trials for Zemiva and our other product candidates may produce negative or inconclusive results, we may decide, or regulators may require us, to conduct additional clinical and/or preclinical testing for these product candidates or cease our clinical trials. If this occurs, we may not be able to obtain approval for these product candidates or our anticipated time to market for these product candidates may be substantially delayed and we may also experience significant additional development costs. We may also be required to undertake additional clinical testing if we change or expand the indications for our product candidates.
If approved, the commercialization of our product candidates, including Zemiva, may not be profitable.
In order for the commercialization of our potential products to be profitable, our products must be cost-effective and economical to manufacture on a commercial scale. Subject to regulatory approval, we expect to incur significant sales, marketing, distribution and, to the extent we do not outsource manufacturing, manufacturing expenses in connection with the commercialization of Zemiva and our other potential products as we do not currently have a dedicated sales force, we do not have manufacturing capability, and we have no experience in the sales, marketing and distribution of pharmaceutical products. In order to commercialize Zemiva or any of our other potential products that we develop, we must develop sales, marketing and distribution capabilities or make arrangements with a third party to perform these functions. Developing a sales force is expensive and time-

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consuming, and we may not be able to develop this capacity. If we are unable to establish adequate sales, marketing and distribution capabilities, independently or with others, we may not be able to generate significant revenue and may not become profitable. Our future profitability will depend on many factors, including, but not limited to:
  •  the costs and timing of developing a commercial scale manufacturing facility or the costs of outsourcing the manufacturing of Zemiva;
 
  •  receipt of FDA approval of Zemiva and our other product candidates, as applicable;
 
  •  the terms of any marketing restrictions or post-marketing commitments imposed as a condition of approval by the FDA or foreign regulatory authorities;
 
  •  the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights;
 
  •  costs of establishing sales, marketing and distribution capabilities;
 
  •  the effect of competing technological and market developments; and
 
  •  the terms and timing of any collaborative, licensing and other arrangements that we may establish.
Even if we receive regulatory approval for Zemiva or any of our other product candidates, we may not ever receive significant revenues from any of them. To the extent that we are not successful in commercializing our potential products, we will incur significant additional losses and the price of our common stock will be negatively affected.
We do not have patent rights to the composition of Zemiva, and if we cannot gain and exploit a period of marketing exclusivity under the Food, Drug & Cosmetic Act, as amended, we may not be able to successfully commercialize Zemiva or our other product candidates.
We do not have patent rights to the composition of Zemiva. Under sections 505(c)(3)(D)(ii) and 505(j)(5)(D)(ii) of the Food, Drug & Cosmetic Act, or the FDCA, as amended by the Hatch-Waxman Act of 1984, a new chemical entity that is granted regulatory approvals may, in the absence of patent protections, be eligible for five years of marketing exclusivity in the United States following regulatory approval. We believe that the underlying active molecule in Zemiva, BMIPP, is a new chemical entity in the United States and should be eligible for this five-year period of marketing exclusivity in the United States under the FDCA. This marketing exclusivity will protect us from any other applicant utilizing the materials in support of our new drug application during the exclusivity period. There is, however, no assurance that BMIPP will, in fact, be considered a new chemical entity for these purposes or be entitled to the period of marketing exclusivity. If we are not able to gain or exploit the period of marketing exclusivity, we may not be able to successfully commercialize Zemiva or may face significant competitive threats to such commercialization from other manufacturers, including the manufacturers of generic alternatives. Further, even if BMIPP is considered a new chemical entity and we are able to gain five years of marketing exclusivity, another company could also gain such marketing exclusivity under the provisions of the FDCA, as amended by the Hatch-Waxman Act if such company can complete a full new drug application with a complete human clinical trial process and obtain regulatory approval of its product.
Our proprietary rights may not adequately protect our technologies and product candidates.
Our commercial success will depend in part on obtaining and maintaining patent and trade secret protection of our technologies and product candidates, as well as successfully defending these patents against third-party challenges. We will only be able to protect our technologies and product candidates from unauthorized use by third parties to the extent that valid and enforceable patents or trade secrets cover them, or in the event they are new chemical entities eligible for the five year period of marketing

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exclusivity under the FDCA. Furthermore, the degree of future protection of our proprietary rights is uncertain because legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep our competitive advantage.
The patent positions of life sciences companies can be highly uncertain and involve complex legal and factual questions for which important legal principles remain unresolved. No consistent policy regarding the breadth of claims allowed in such companies’ patents has emerged to date in the United States. The patent situation outside the United States is even more uncertain. Changes in either the patent laws or in the interpretations of patent laws in the United States or other countries may diminish the value of our intellectual property. Accordingly, we cannot predict the breadth of claims that may be allowed or enforced in our patents or in third-party patents. For example:
  •  we or our licensors might not have been the first to make the inventions covered by each of our pending patent applications and issued patents;
 
  •  we or our licensors might not have been the first to file patent applications for these inventions;
 
  •  others may independently develop similar or alternative technologies or duplicate any of our technologies;
 
  •  our pending patent applications and the pending patent applications of our licensors may not result in issued patents;
 
  •  our issued patents and issued patents of our licensors may not provide a basis for commercially viable products, or may not provide us with any competitive advantages, or may be challenged and invalidated by third parties;
 
  •  we may not develop additional proprietary technologies or product candidates that are patentable; or
 
  •  the patents of others may have an adverse effect on our business.
We also rely on trade secrets to protect our technology, especially where we do not believe patent protection is appropriate or obtainable. Trade secrets, however, are difficult to protect. While we believe that we use reasonable efforts to protect our trade secrets, our or our strategic partners’ employees, consultants, contractors or advisors may unintentionally or willfully disclose our information to competitors. We seek to protect this information, in part, through the use of non-disclosure and confidentiality agreements with employees, consultants, advisors and others. These agreements may be breached, and we may not have adequate remedies for a breach. In addition, we cannot ensure that those agreements will provide adequate protection for our trade secrets, know-how or other proprietary information and prevent their unauthorized use or disclosure. To the extent that consultants, key employees or other third parties apply technological information independently developed by them or by others to our product candidates, disputes may arise as to the proprietary rights of the information, which may not be resolved in our favor. If our trade secrets become known to competitors with greater experience and financial resources, the competitors may copy or use our trade secrets and other proprietary information in the advancement of their products, methods or technologies.
If we were to enforce a claim that a third party had illegally obtained and was using our trade secrets, it would be expensive and time consuming and the outcome would be unpredictable. In addition, courts outside the United States are sometimes less willing to protect trade secrets than courts in the United States. Moreover, if our competitors independently develop equivalent knowledge, methods and know-how, it will be more difficult for us to enforce our patent rights, and our business could be adversely effected.

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If we are not able to defend the patent or trade secret protection position of our technologies and product candidates, then we will not be able to exclude competitors from developing or marketing competing products and we may not generate enough revenue from product sales to justify the cost of development of our product candidates and to achieve or maintain profitability.
Our ability to commercialize our potential products will depend on our ability to sell such products without infringing the patent or proprietary rights of third parties. If we are sued for infringing intellectual property rights of third parties, such litigation will be costly and time consuming and an unfavorable outcome would have a significant adverse effect on our business.
Our ability to commercialize our potential products will depend on our ability to sell such products without infringing the patents or other proprietary rights of third parties. Numerous U.S. and foreign-issued patents and pending applications, which are owned by third parties, exist in the various areas in which we have products. In addition, because patent applications can take several years to issue, there may be currently pending applications unknown to us which may later result in issued patents that our product candidates may infringe. There could also be existing patents of which we are not aware that our product candidates may inadvertently infringe.
If a third party claims that we infringe on its patents or other proprietary rights, we could face a number of issues that could seriously harm our competitive position, including:
  •  infringement and other intellectual property claims which, with or without merit, can be costly and time consuming to litigate, can delay the regulatory approval process and can divert management’s attention from our core business strategy;
 
  •  substantial damages for past infringement which we may have to pay if a court determines that our products or technologies infringe upon a competitor’s patent or other proprietary rights;
 
  •  a court prohibiting us from selling or licensing our products or technologies unless the holder licenses the patent or other proprietary rights to us, which such holder is not required to do;
 
  •  if a license is available from a holder, we may have to pay substantial royalties or grant cross licenses to our patents or other proprietary rights; and
 
  •  redesigning our process so that it does not infringe, which may not be possible or may require substantial time and expense.
Such actions could harm our competitive position and our ability to generate revenue and could result in increased costs.
If another party obtains orphan drug exclusivity for the drugs and indications we are targeting, we may be precluded from commercializing our product candidates for those indications.
We intend to seek orphan drug exclusivity for Ultratrace MIBG to be used as a targeted radiotherapeutic for the treatment of neuroendocrine tumors. Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition, which is defined by the FDA as a disease or condition that affects fewer than 200,000 individuals in the United States. The company that obtains the first FDA approval for a designated orphan drug indication receives marketing exclusivity for use of that drug for that indication for a period of seven years. Orphan drug exclusive marketing rights may be lost if the FDA later determines that the request for designation was materially defective, or if the manufacturer is unable to assure sufficient quantity of the drug. Orphan drug designation does not shorten the development or regulatory review time of a drug, but does provide limited advantages in the regulatory review and approval process. Thus, orphan drug exclusivity may not prevent other market entrants. A different drug, or under limited

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circumstances, such as the inability to supply sufficient quantities of the drug for the designated indication, the same drug, may be approved by the FDA for the same orphan drug indication. Moreover, due to the uncertainties associated with developing pharmaceutical products, we may not be the first to obtain marketing approval for any orphan drug indication. Even if we obtain orphan drug designation, a competitor may obtain regulatory approval prior to us for the same product and indication we are targeting and we may be prevented from obtaining approval for that indication for seven years.
If our product candidates, including Zemiva, do not gain market acceptance among physicians, patients and the medical community, we will be unable to generate significant revenue, if any.
The products that we develop may not achieve market acceptance among physicians, patients, third-party payers and others in the medical community. If we receive the regulatory approvals necessary for commercialization, the degree of market acceptance will depend upon a number of factors, including:
  •  limited indications of regulatory approvals;
 
  •  the establishment and demonstration in the medical community of the clinical efficacy and safety of our product candidates and their potential advantages over existing diagnostic compounds;
 
  •  the prevalence and severity of any side effects;
 
  •  our ability to offer our product candidates at an acceptable price;
 
  •  the relative convenience and ease of administration of our products;
 
  •  the strength of marketing and distribution support; and
 
  •  sufficient third-party coverage or reimbursement.
The market may not accept Zemiva based on any number of the above factors. If approved, Zemiva’s primary competition in the emergency department setting will be the current standard of care, which involves several diagnostic products, and its primary competition in the non-acute setting will be existing perfusion agents such as Cardiolite and Myoview. The market may choose to continue utilizing the existing products for any number of reasons, including familiarity with or pricing of these existing products. The failure of Zemiva or any of our product candidates to gain market acceptance could impair our ability to generate revenue, which could have a material adverse effect on our future business, financial condition and results of operations.
We may need to raise additional funds in order to finance the commercialization of our potential products by issuing securities or through collaboration and licensing arrangements, which may cause dilution to existing stockholders or require us to relinquish rights to our technologies and our product candidates.
Developing our product candidates, conducting clinical trials, establishing manufacturing facilities and developing marketing and distribution capabilities is expensive. We may need to finance future cash needs through additional public or private equity offerings, debt financings or corporate collaboration and licensing arrangements. We cannot be certain that additional funding will be available to us on acceptable terms, or at all. If adequate funds are not available, we may be required to delay, reduce the scope of or eliminate one or more of our research or development programs or our commercialization efforts. To the extent that we raise additional funds by issuing equity securities, our stockholders may experience additional dilution. Debt financing, if available, may involve restrictive covenants. To the extent that we raise additional funds through collaboration and licensing arrangements, it may be necessary to relinquish some rights to our technologies or our product candidates or grant licenses on terms that are not favorable to us.

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We have no commercial manufacturing facility and no experience in manufacturing products for commercial purposes.
We have no commercial manufacturing facility and no experience in manufacturing products for commercial purposes. We currently contract with a Canadian manufacturing facility to supply the BMIPP molecule we need for later stage clinical testing and for initial product sales, although we will need to enter into additional manufacturing arrangements for the full commercialization of Zemiva and our manufacturing needs for all other product candidates. We will be dependent on such third parties to supply our products according to our specifications, in sufficient quantities, on time, in compliance with regulatory standards and at a competitive price. Manufacturers supplying biopharmaceutical products must comply with FDA regulations which require, among other things, compliance with the FDA’s evolving regulations on current Good Manufacturing Practices, or cGMPs, which are enforced by the FDA through its facilities inspection program. The manufacture of products at any facility will be subject to strict quality control, testing and record keeping requirements, and continuing obligations regarding the submission of safety reports and other post-market information. We may not be able to obtain sufficient quantities of the products we develop to meet our needs for pre-clinical or clinical development, and we may have problems complying, or maintaining compliance, with cGMP.
A third-party manufacturer may experience problems complying with FDA regulations or manufacturing our product candidates in commercial quantities. This would interrupt our supply of products and could hinder our product testing or product sales. We cannot be sure that we will be able to obtain an adequate supply of product candidates on acceptable terms.
There are a limited number of manufacturers that can produce our lead product candidate, Zemiva.
There are a limited number of manufacturers that can produce Zemiva in compliance with applicable regulations and in sufficient quantities for us to successfully commercialize Zemiva. If we are unable to secure manufacturing agreements on acceptable terms with any of these manufacturers, or there is a shutdown or disruption in these facilities due to technical, regulatory or other reasons, it could harm our ability to manufacture and commercialize Zemiva. This could adversely impact our business, financial condition and results of operation.
If we fail to attract and retain senior management, consultants, advisors and scientific and technical personnel, our product development and commercialization efforts could be impaired.
Our performance is substantially dependent on the performance of our senior management and key scientific and technical personnel, particularly David Barlow, the Company’s Chairman and Chief Executive Officer, and John Babich, the Company’s President and Chief Scientific Officer. Although we have entered into employment agreements with five members of our senior management, David Barlow, John Babich, John McCray, Nicholas Borys and Bob Gallahue, there is no assurance that they will remain in our employ for the entire term of such employment agreements. The loss of the services of any member of our senior management or our scientific or technical staff may significantly delay or prevent the development of our product candidates and other business objectives by diverting management’s attention to transition matters and identification of suitable replacements, if any, and could have a material adverse effect on our business, operating results and financial condition. We only maintain key man life insurance on David Barlow and John Babich.
We also rely on consultants and advisors to assist us in formulating our research and development strategy. All of our consultants and advisors are either self-employed or employed by other organizations, and they may have conflicts of interest or other commitments, such as consulting or advisory contracts with other organizations, that may affect their ability to contribute to us.
In addition, we believe that we will need to recruit additional executive management and scientific and technical personnel. There is currently intense competition for skilled executives and employees with

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relevant scientific and technical expertise, and this competition is likely to continue. The inability to attract and retain sufficient scientific, technical and managerial personnel could limit or delay our product development efforts, which would adversely affect the development of our product candidates and commercialization of our potential products and growth of our business.
We expect to expand our research, development, clinical research and marketing capabilities and, as a result, we may encounter difficulties in managing our growth, which could disrupt our operations.
We expect to have significant growth in expenditures, the number of our employees and the scope of our operations, in particular with respect to those potential products that we elect to commercialize independently or together with others. To manage our anticipated future growth, we must continue to implement and improve our managerial, operational and financial systems, expand our facilities and continue to train qualified personnel. Due to our limited resources, we may not be able to effectively manage the expansion of our operations or train additional qualified personnel. The physical expansion of our operations may lead to significant costs and may divert our management and business development resources. Any inability to manage growth could delay the execution of our business plan or disrupt our operations.
We have a history of losses and expect to continue to incur losses and may not achieve or maintain profitability.
We have incurred net losses every year since our inception in 1997 and have generated no revenue from product sales or licenses to date. As of June 30, 2005, we had an accumulated deficit of approximately $46.2 million. We expect to incur additional losses for at least the next several years and cannot be certain that we will ever achieve profitability. As a result, our business is subject to all of the risks inherent in the development of a new business enterprise, such as the risk that we may not obtain substantial additional capital needed to support the expenses of developing our technology and commercializing our potential products; develop a market for our potential products; successfully transition from a company with a research focus to a company capable of either manufacturing and selling potential products or profitably licensing our potential products to others; and/or attract and retain qualified management, technical and scientific staff.
We currently have no significant source of revenue and may never become profitable.
To date, we have not generated any revenue for product sales and we do not know when or if any of our product candidates will generate revenue. Our ability to generate revenue depends on a number of factors, including our ability to successfully complete our ongoing clinical trials for Zemiva and obtain regulatory approval to commercialize this potential product. Even then, we will need to establish and maintain sales, marketing, distribution and to the extent we do not outsource manufacturing, manufacturing capabilities. We plan to rely on one or more strategic collaborators to help generate revenues in markets outside of the United States, and we cannot be sure that our collaborators, if any, will be successful. If we are unable to generate significant revenue, we may not become profitable, and we may be unable to continue our operations. Even if we are able to commercialize Zemiva, we may not achieve profitability for at least several years after generating material revenue.
We have a limited operating history and potential financial results are uncertain.
We have a limited operating history and face many of the risks of a new business. As a result, it is difficult to accurately forecast our potential revenue. Our revenue and income potential is unproven and our business model is still emerging. Therefore, we cannot make any assurance we will provide a return on investment in the future. An investor in our common stock must consider the challenges,

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risks and uncertainties frequently encountered in the establishment of new technologies and products in emerging markets and evolving industries. These challenges include our ability to:
  •  execute our business model;
 
  •  create brand recognition;
 
  •  manage growth in our operations;
 
  •  create a customer base cost-effectively;
 
  •  retain customers;
 
  •  access additional capital when required; and
 
  •  attract and retain key personnel.
We cannot be certain that our business model will be successful or that it will successfully address these and other challenges, risks and uncertainties.
We currently have an existing material weakness in our internal control over financial reporting. If we are unable to improve and maintain the quality of our system of internal control over financial reporting, any deficiencies could materially and adversely affect our ability to report timely and accurate financial information about us.
In connection with the audit of our 2004 consolidated financial statements, management identified a material weakness in our internal control over financial reporting. This was a matter that, in our judgment could adversely affect our ability to record, process, summarize and report financial information consistent with the assertions of management in our financial statements. A material weakness is defined as a significant deficiency, or combination of significant deficiencies, that results in more than a remote likelihood that a material misstatement of the financial statements will not be prevented or detected. Specifically, our controls over the application of generally accepted accounting principles were ineffective as a result of insufficient resources and training in the accounting and finance function. This resulted in a number of post-close adjustments and corrections. We cannot be certain that the measures we have taken or plan to take will ensure that we will maintain adequate controls over our financial processes and reporting in the future. Any failure to maintain adequate controls or to adequately implement required new or improved controls could harm our operating results or cause us to fail to meet our reporting obligations. Inadequate internal control could also cause investors to lose confidence in our reported financial information.
Beginning no later than with our Annual Report on Form 10-K for the fiscal year ending December 31, 2007, we will be required to furnish a report by our management on the effectiveness of our internal control over financial reporting. This report will contain, among other matters, an assessment of the effectiveness of our internal control over financial reporting as of the end of our fiscal year, including a statement as to whether or not our internal control over financial reporting is effective. This assessment must include disclosure of any material weaknesses in our internal control over financial reporting identified by management. This report must also contain a statement that our independent registered public accounting firm has issued an attestation report on management’s assessment of such internal control. If we are unable to assert that our internal control over financial reporting is effective as of December 31, 2007 (or if our independent registered public accountants are unable to attest that our management’s report is fairly stated or they are unable to express an opinion on the effectiveness of our internal control), we could lose investor confidence in the accuracy and completeness of our financial reports, which could have an adverse effect on our stock price.

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Because we have operated as a private company, we have limited experience in complying with public company obligations, including Section 404 of the Sarbanes-Oxley Act of 2002.
We are a small company with limited resources. We have operated as a private company not subject to many of the requirements applicable to public companies including Section 404 of the Sarbanes-Oxley Act of 2002. The number and qualifications of our finance and accounting staff are consistent with those of a private company. We may encounter substantial difficulty attracting qualified staff with requisite experience due to the high level of competition for experienced financial professionals. Furthermore, we have only recently begun a formal process to evaluate our internal control over financial reporting. Given the status of our efforts, coupled with the fact that guidance from regulatory authorities in the area of internal control over financial reporting continues to evolve, substantial uncertainty exists regarding our ability to comply by applicable deadlines.
We have little control over the scientists and consultants at the various academic and research institutions with whom we have relationships.
We have relationships with scientists and consultants at several universities and research institutions. These individuals conduct research at our request and, in some cases, we may license technology from them. These researchers are not employed by us and may have commitments to, or consulting or advisory contracts with, other entities that may limit their availability to work on our projects. As a result, we have limited control over their activities and, except as otherwise required by our agreements with these persons, we can expect only limited amounts of their time to be dedicated to its projects. Our ability to make new discoveries and to commercialize potential products based on those discoveries may depend in part on continued arrangements with researchers at academic and other institutions. If our relationship with any of these scientists or consultants were to be terminated, such termination could have a material adverse effect on our ability to develop or commercialize our potential products.
We depend on government funding, which if lost or reduced, could have an adverse effect on our research and development.
We have relied on government research grants for a portion of our funding, including grants awarded by the National Institutes of Health under the Small Business Innovation Research program and the Small Business Technology Transfer program. To date, we have received a total of approximately $4,525,000 in grants pursuant to these programs. Most of our government grants have been awarded as Phase 1 grants and we expect to file Phase 2 grant applications where appropriate, but we cannot be assured that these grants or any new Phase 1 grant applications will be awarded to us, nor can we be sure that we will continue to be eligible to receive such grants once this offering is completed.
Under the terms of our government grants, we have all right, title and interest in our patents, copyrights and data pertaining to our product development, subject to certain rights of the government. Under existing regulations, the government receives a royalty-free license for federal government use for all patents developed under a government grant. In addition, under certain circumstances the government may require us to license technology resulting from the government funded projects to third parties and may require that we manufacture our product in the United States.
Funding of government grants is subject to government appropriation and all of our government contracts contain provisions which make them terminable at the convenience of the government. The government could terminate, reduce or delay the funding under any of our grants at any time. In the event we are not successful in obtaining any new government grants or extensions to existing grants, our research and development efforts could be adversely affected.

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Risks Related to Our Industry
Our competitors may develop products that are less expensive, safer or more effective, which may diminish or eliminate the commercial success of any potential products that we may commercialize.
We will compete with several pharmaceutical companies and our competitors may:
  •  develop products and market products that are less expensive or more effective than our future products;
 
  •  commercialize competing products before we or our partners can launch any products developed from our product candidates;
 
  •  initiate or withstand substantial price competition more successfully than we can;
 
  •  have greater success in recruiting skilled technical and scientific workers from the limited pool of available talent;
 
  •  more effectively negotiate third-party licenses and strategic relationships; and
 
  •  take advantage of acquisition or other opportunities more readily than we can.
We will compete for market share against large pharmaceutical and biotechnology companies, smaller companies that are collaborating with larger pharmaceutical companies, new companies, academic institutions, government agencies and other public and private research organizations. Many of these competitors, either alone or together with their partners, may develop new product candidates that will compete with ours, and these competitors may, and in certain cases do, operate larger research and development programs or have substantially greater financial resources than we do.
If our competitors market products that are less expensive, safer or more effective than our future products developed from our product candidates, or that reach the market before our potential products, we may not achieve commercial success. For example, if approved, Zemiva will compete in the emergency department setting with the current standard of care in the assessment of chest pain patients who present to emergency departments. This standard involves several diagnostic products and procedures, in some cases involving the use of perfusion imaging agents. If approved, Zemiva’s primary competition in the non-acute setting will be perfusion agents such as Cardiolite and Myoview. The market may choose to continue utilizing the existing products for any number of reasons, including familiarity with or pricing of these existing products. The failure of Zemiva or any of our product candidates to compete with products marketed by our competitors would impair our ability to generate revenue, which would have a material adverse effect on our future business, financial condition and results of operations.
In addition, the life sciences industry is characterized by rapid technological change. Because our research approach integrates many technologies, it may be difficult for us to stay abreast of the rapid changes in each technology. If we fail to stay at the forefront of technological change, we may be unable to compete effectively. Our competitors may render our technologies obsolete by advances in existing technological approaches or the development of new or different approaches, potentially eliminating the advantages in our product discovery process that we believe we derive from our research approach and proprietary technologies.
The use of hazardous materials in our operations may subject us to environmental claims or liabilities.
Our research and development activities involve the use of hazardous materials, including chemicals and biological and radioactive materials. Injury or contamination from these materials may occur and we could be held liable for any damages, which could exceed our available financial resources. This liability could materially adversely affect our business, financial condition and results of operations.

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We are subject to federal, state and local laws and regulations governing the use, manufacture, storage, handling and disposal of hazardous materials and waste products. We may be required to incur significant costs to comply with environmental laws and regulations in the future that could materially adversely affect our business, financial condition and results of operations.
If we fail to comply with extensive regulations enforced by the FDA and other agencies with respect to pharmaceutical products, the commercialization of our product candidates could be prevented, delayed or halted.
Research, preclinical development, clinical trials, manufacturing and marketing of our product candidates are subject to extensive regulation by various government authorities. We have not received marketing approval for Zemiva or our other product candidates. The process of obtaining FDA and other required regulatory approvals is lengthy and expensive, and the time required for such approvals is uncertain. The approval process is affected by such factors as:
  •  the severity of the disease;
 
  •  the quality of submission relating to the product candidate;
 
  •  the product candidate’s clinical efficacy and safety;
 
  •  the strength of the chemistry and manufacturing control of the process;
 
  •  the manufacturing facility compliance;
 
  •  the availability of alternative treatments;
 
  •  the risks and benefits demonstrated in clinical trials; and
 
  •  the patent status and marketing exclusivity rights of certain innovative products.
Any regulatory approvals that we or our partners receive for our product candidates may also be subject to limitations on the indicated uses for which the product candidate may be marketed or contain requirements for potentially costly post-marketing follow-up studies. The subsequent discovery of previously unknown problems with the product candidate, including adverse events of unanticipated severity or frequency, may result in restrictions on the marketing of the product candidate and withdrawal of the product candidate from the market.
U.S. manufacturing, labeling, storage and distribution activities also are subject to strict regulating and licensing by the FDA. The manufacturing facilities for our biopharmaceutical products are subject to periodic inspection by the FDA and other regulatory authorities and from time to time, these agencies may send notice of deficiencies as a result of such inspections. Our failure, or the failure of our biopharmaceutical manufacturing facilities, to continue to meet regulatory standards or to remedy any deficiencies could result in corrective action by the FDA or these other authorities, including the interruption or prevention of marketing, closure of our biopharmaceutical manufacturing facilities, and fines or penalties.
Regulatory authorities also will require post-marketing surveillance to monitor and report to the FDA potential adverse effects of our product candidates. Congress or the FDA in specific situations can modify the regulatory process. If approved, any of our product candidates’ subsequent failure to comply with applicable regulatory requirements could, among other things, result in warning letters, fines, suspension or revocation of regulatory approvals, product recalls or seizures, operating restrictions, injunctions and criminal prosecutions.
The FDA’s policies may change and additional government regulations may be enacted that could prevent or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of adverse government regulation that may arise from future legislation or

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administrative action. If we are not able to maintain regulatory compliance, we might not be permitted to market our product candidates and our business could suffer.
In the future, we intend to distribute and sell our potential products outside of the United States, which will subject us to further regulatory risk.
In addition to seeking approval from the FDA for Zemiva in the United States, we intend to seek the governmental approval required to market Zemiva and our other potential products in European Union countries such as the United Kingdom, France, Germany, Belgium, Holland and Italy through third parties. We may in the future also seek approvals for additional countries. The regulatory review process varies from country to country, and approval by foreign government authorities is unpredictable, uncertain and generally expensive. Our ability to market our potential products could be substantially limited due to delays in receipt of, or failure to receive, the necessary approvals or clearances. We anticipate commencing the applications required in some or all of these countries following approval by the FDA; however, we may decide to file applications in advance of the FDA approval if we determine such filings to be both time and cost effective. If we export any of our potential products that have not yet been cleared for domestic commercial distribution, such products may be subject to FDA export restrictions. Marketing of our potential products in these countries, and in most other countries, is not permitted until we have obtained required approvals or exemptions in each individual country. Failure to obtain necessary regulatory approvals could impair our ability to generate revenue from international sources.
Market acceptance of our potential products will be limited if users are unable to obtain adequate reimbursement from third-party payers.
Government health administration authorities, private health insurers and other organizations generally provide reimbursement for products like our product candidates, and our commercial success will depend in part on these third-party payers agreeing to reimburse patients for the costs of our potential products. Even if we succeed in bringing any of our product candidates to market, we cannot assure you that third-party payers will consider our potential products cost effective or provide reimbursement in whole or in part for their use.
Significant uncertainty exists as to the reimbursement status of newly approved health care products. Each of our product candidates is intended to replace or alter existing therapies or procedures. These third-party payers may conclude that our product candidates are less safe, effective or cost-effective than these existing therapies or procedures. Therefore, third-party payers may not approve our products candidates for reimbursement.
If third-party payers do not approve our product candidates for reimbursement or fail to reimburse for them adequately, sales will suffer as some physicians or their patients will opt for a competing product that is approved for reimbursement or is adequately reimbursed. Even if third-party payers make reimbursement available, these payers’ reimbursement policies may adversely affect our ability and the ability of our potential collaborators to sell our potential products on a profitable basis.
The trend toward managed healthcare in the United States, the growth of organizations such as health maintenance organizations and legislative proposals to reform healthcare and government insurance programs could significantly influence the purchase of healthcare services and products, resulting in lower prices and reduced demand for our products which could adversely affect our business, financial condition and results of operations.
In addition, legislation and regulations affecting the pricing of our product candidates may change in ways adverse to us before or after the FDA or other regulatory agencies approve any of our product candidates for marketing. While we cannot predict the likelihood of any of these legislative or regulatory proposals, if any government or regulatory agencies adopt these proposals, they could materially adversely affect our business, financial condition and results of operations.

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Product liability claims may damage our reputation and, if insurance proves inadequate, the product liability claims may harm our business.
We may be exposed to the risk of product liability claims that is inherent in the biopharmaceutical industry. A product liability claim may damage our reputation by raising questions about our product’s safety and efficacy and could limit our ability to sell one or more products by preventing or interfering with commercialization of our potential products.
In addition, product liability insurance for the biopharmaceutical industry is generally expensive to the extent it is available at all. There can be no assurance that we will be able to obtain and maintain such insurance on acceptable terms or that we will be able to secure increased coverage if the commercialization of our potential products progresses, or that future claims against us will be covered by our product liability insurance. Moreover, there can be no assurance that the existing coverage of our insurance policy and/or any rights of indemnification and contribution that we may have will offset any future claims. We currently maintain product liability insurance of $10 million per occurrence and in the aggregate for clinical trial related occurrences only. We believe that this coverage is currently adequate based on current and projected business activities and the associated risk exposure, although we expect to increase this coverage as our business activities and associated risks grow. A successful claim against us with respect to uninsured liabilities or in excess of insurance coverage and not subject to any indemnification or contribution could have a material adverse effect on our business, financial condition and results of operations.
We could be negatively impacted by the application or enforcement of federal and state fraud and abuse laws, including anti-kickback laws and other federal and state anti-referral laws.
We are subject to various federal and state laws pertaining to healthcare fraud and abuse, including anti-kickback laws and physician self-referral laws. Violations of these laws are punishable by criminal and civil sanctions, including, in some instances, imprisonment and exclusion from participation in federal and state healthcare programs, including Medicare, Medicaid and Veterans Administration health programs. Because of the far-reaching nature of these laws, we may be required to alter or discontinue one or more of our practices to be in compliance with these laws. Healthcare fraud and abuse regulations are complex, and even minor irregularities can potentially give rise to claims that a statute or prohibition has been violated. Any violations of these laws, or any action against us for violation of these laws, even if we successfully defend against it, could result in a material adverse effect on our business, financial condition and results of operations. If there is a change in law, regulation or administrative or judicial interpretations, we may have to change or discontinue our business practices or our existing business practices could be challenged as unlawful, which could have a material adverse effect on our business, financial condition and results of operations. In addition, we could become subject to false claims litigation under federal statutes, which can lead to civil money penalties, restitution, criminal fines and imprisonment, and exclusion from participation in Medicare, Medicaid and other federal and state healthcare programs. These false claims statutes include the False Claims Act, which allows any person to bring suit on behalf of the federal government alleging the submission of false or fraudulent claims, or causing to present such false or fraudulent claims, under federal programs or contracts claims or other violations of the statute and to share in any amounts paid by the entity to the government in fines or settlement. These suits against pharmaceutical companies have increased significantly in recent years and have increased the risk that a healthcare company will have to defend a false claim action, pay fines or restitution, or be excluded from the Medicare, Medicaid or other federal and state healthcare programs as a result of an investigation arising out of such action. We cannot assure you that we will not become subject to such litigation or, if we are not successful in defending against such actions, that such actions will not have a material adverse effect on our business, financial condition and results of operations. In addition, we cannot assure you that the costs of defending claims or allegations under the False Claims Act will not have a material adverse effect on our business, financial condition and results of operations.

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A provision of the Social Security Act, commonly referred to as the Federal Anti-Kickback Statute, prohibits the offer, payment, solicitation or receipt of any form of remuneration in return for referring, ordering, leasing, purchasing or arranging for or recommending the ordering, purchasing or leasing of items or services payable by Medicare, Medicaid or any other federal health care program. The Federal Anti-Kickback Statute is very broad in scope and many of its provisions have not been uniformly or definitively interpreted by existing case law or regulations. In addition, many states in which our products may be sold have adopted laws similar to the Federal Anti-Kickback Statute, and some of these laws are even broader than the Federal Anti-Kickback Statute in that their prohibitions are not limited to items or services paid for by a federal health care program but, instead, apply regardless of the source of payment. Violations of the Federal Anti-Kickback Statute may result in substantial civil or criminal penalties and exclusion from participation in federal healthcare programs.
If we choose to acquire new complementary businesses, products or technologies, we may be unable to complete these acquisitions or to successfully integrate them in a cost-effective and non-disruptive manner.
Our success depends on our ability to continually enhance and broaden our product offerings in response to changing customer demands, competitive pressures and technologies. Accordingly, we may in the future pursue the acquisition of complementary businesses, products or technologies instead of developing them ourselves. We have no current commitments with respect to any acquisition or investment. We do not know if we will be able to successfully complete any acquisitions or whether we will be able to successfully integrate any acquired business, product or technology or retain any key employees. Integrating any business, product or technology we acquire could be expensive and time consuming, disrupt our on-going business and distract our management. If we are unable to integrate any acquired businesses, products or technologies effectively, our business will suffer. In addition, any amortization or charges resulting from the costs of acquisitions could harm our business and operating results.
Risks Related To Our Common Stock and This Offering
As a result of prior sales of our equity securities at prices lower than the price in this offering, you will incur immediate and substantial dilution of your investment.
Purchasers of our common stock in this offering will pay a price per share that substantially exceeds the per share value of our tangible assets after subtracting our liabilities and the per share price paid by our existing stockholders and by persons who exercise currently outstanding options to acquire our common stock. Accordingly, assuming an initial public offering price of $           per share, you will experience immediate and substantial dilution of approximately $           per share, representing the difference between our pro forma net tangible book value per share after giving effect to this offering and the assumed initial public offering price. In addition, purchasers of our common stock in this offering will have contributed approximately           % of the aggregate price paid by all purchasers of our common stock but will own only approximately           % of our common stock outstanding after this offering. See the section captioned “Dilution.”
Our stock price may fluctuate significantly and you may not be able to resell your shares at or above the initial public offering price.
Prior to this offering, you could not buy or sell our common stock publicly. An active public market for our common stock may not develop or be sustained after this offering. We will negotiate and determine the initial public offering price with the representatives of the underwriters based on several factors. This price may vary from the market price of our common stock after this offering. You may be unable to sell your shares of common stock at or above the initial offering price due to fluctuation in the market price of the common stock arising from changes in our operating performance or

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prospects. In addition, the stock market, particularly in recent years, has experienced significant volatility particularly with respect to pharmaceutical, biotechnology and other life sciences company stocks. The volatility of pharmaceutical, biotechnology and other life sciences company stocks often does not relate to the operating performance of the companies represented by the stock. Factors that could cause this volatility in the market price of our common stock include:
  •  results from and any delays in our clinical trials;
 
  •  failure or delays in entering additional product candidates into clinical trials;
 
  •  failure or discontinuation of any of our research programs;
 
  •  delays in establishing new strategic relationships;
 
  •  delays in the development or commercialization of our potential products;
 
  •  market conditions in the pharmaceutical and biotechnology sectors and issuance of new or changed securities analysts’ reports or recommendations;
 
  •  actual and anticipated fluctuations in our financial and operating results;
 
  •  developments or disputes concerning our intellectual property or other proprietary rights;
 
  •  introduction of technological innovations or new commercial products by us or our competitors;
 
  •  issues in manufacturing our potential products;
 
  •  market acceptance of our potential products;
 
  •  third-party healthcare reimbursement policies;
 
  •  FDA or other domestic or foreign regulatory actions affecting us or our industry;
 
  •  litigation or public concern about the safety of our product candidates; and
 
  •  additions or departures of key personnel.
These and other external factors may cause the market price and demand for our common stock to fluctuate substantially, which may limit or prevent investors from readily selling their shares of common stock and may otherwise negatively affect the liquidity of our common stock. In addition, in the past, when the market price of a stock has been volatile, holders of that stock have instituted securities class action litigation against the company that issued the stock. If any of our stockholders brought a lawsuit against us, we could incur substantial costs defending the lawsuit. Such a lawsuit could also divert the time and attention of our management.
If the ownership of our common stock continues to be highly concentrated, it may prevent you and other stockholders from influencing significant corporate decisions and may result in entrenchment of management or conflicts of interest that could cause our stock price to decline.
Our executive officers, directors, and their affiliates will beneficially own or control approximately           % of the outstanding shares of our common stock (after giving effect to the conversion of all outstanding convertible preferred stock following the completion of this offering. Accordingly, these executive officers, directors and their affiliates, acting as a group, will have substantial influence over the outcome of corporate actions requiring stockholder approval, including the election of directors, any merger, consolidation or sale of all or substantially all of our assets or any other significant corporate transactions. These stockholders may also delay or prevent a change of control of our company, even if such a change of control would benefit our other stockholders. The significant concentration of stock ownership may adversely affect the trading price of our common stock due to investors’ perception that entrenchment of management or conflicts of interest may exist or arise.

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A significant portion of our total outstanding shares are restricted from immediate resale but may be sold into the market in the near future. This could cause the market price of our common stock to drop significantly, even if our business is doing well.
Sales of a substantial number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the market that the holders of a large number of shares intend to sell shares, could reduce the market price of our common stock. After this offering, we will have outstanding                     shares of common stock based on the number of shares outstanding as of                                         ,                     . This includes the shares that we are selling in this offering, which may be resold in the public market immediately. The remaining                     shares, or           % of our outstanding shares after this offering, are currently restricted as a result of securities laws or lock-up agreements, but will be able to be sold in the near future as set forth below.
     
Number of Shares and    
% of Total Outstanding   Date Available for Sale Into Public Market
     
          shares, or      %
       days, subject to extension in certain cases, after the date of this prospectus due to the lock-up agreements between the holders of these shares and the underwriters or the Company, respectively. However, the underwriters or the Company, as applicable, can waive the provisions of these lock-up agreements and allow these stockholders to sell their shares at any time. Sales of these shares by “affiliates” and sales of these shares by non-“affiliates” who have held such shares for less than 2 years are subject to the volume limitations, manner of sale provisions, and public information requirements of Rule 144.
In addition to the foregoing, we had options to purchase                     shares of common stock and warrants to purchase                     shares of common stock outstanding and exercisable as of June 30, 2005. We intend to register the shares of common stock issuable or reserved for issuance under our equity plans within 180 days after the date of this prospectus.
We have never paid dividends on our common stock, and except for payment of accrued dividends to certain preferred holders, we do not anticipate paying any cash dividends in the foreseeable future.
We have paid no cash dividends on our common stock to date. We currently intend to retain our future earnings, if any, to fund the development and growth of our business. Contingent upon the closing of this offering, we intend to pay to certain existing preferred stockholders a one-time cash dividend in an aggregate amount of $          . Following the completion of this offering and except for the one-time dividend payment to certain preferred holders, we do not anticipate paying any cash dividends on our capital stock for the foreseeable future. In addition, the terms of existing or any future debt facilities may preclude us from paying dividends on our stock. As a result, capital appreciation, if any, of our common stock will be your sole source of gain for the foreseeable future.
We will have broad discretion in how we use the proceeds of this offering and we may not use these proceeds effectively, which could affect our results of operations and cause our stock price to decline, or we may use the proceeds in ways with which you disagree.
We will have considerable discretion in the application of the net proceeds of this offering. We expect to use the majority of the net proceeds of this offering to continue the development and prepare for the commercialization of our lead molecular imaging pharmaceutical candidate, Zemiva, and to initiate and expand the clinical development of Ultratrace MIBG, our lead targeted radiotherapeutic candidate for cancer. Because of the number and variability of factors that determine our use of the proceeds from this offering, our intended uses for the proceeds of this offering may vary substantially from our currently planned uses. Stockholders may not deem such uses desirable, and our use of the proceeds may not yield a significant return or any return at all for our stockholders.

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We are currently a defendant in litigation with five of our stockholders regarding the pricing of a prior equity financing.
Five of our stockholders initiated a lawsuit in 2004 against us and certain directors. The claims against us are in the nature of a derivative action claiming that we were harmed by receiving less money for shares we issued in 2002 than we should have received. After commencement of this lawsuit, our Board formed a special litigation committee of disinterested directors, who then engaged separate, independent legal counsel to review these claims. The special litigation committee, in conjunction with its counsel, concluded that we should not pursue these derivative claims and we are seeking to dismiss these claims in court. There can be no assurance, however, that these claims will be dismissed or will be finally determined in our favor. Ongoing litigation could result in significant legal costs and expenses for the Company and, if the litigation were to be determined in a manner adverse to us, there could be no assurance that we will not incur further expense in the nature of damages.
Some provisions of our Restated Articles of Organization and Amended and Restated Bylaws may inhibit potential acquisition bids that you may consider favorable.
Our Restated Articles of Organization and Amended and Restated Bylaws contain provisions that may enable our Board of Directors to resist a change in control of our company even if a change in control were to be considered favorable by stockholders. These provisions include:
  •  the authorization of undesignated preferred stock, the terms of which may be established and shares of which may be issued without stockholder approval;
 
  •  advance notice procedures required for stockholders to nominate candidates for election as directors or to bring matters before an annual meeting of stockholders;
 
  •  limitations on persons authorized to call a meeting of stockholders;
 
  •  a staggered Board of Directors; and
 
  •  supermajority voting requirements to remove directors from office.
These and other provisions contained in our charter and bylaws could delay or discourage transactions involving an actual or potential change in control of us or our management, including transactions which our stockholders might otherwise receive a premium for their shares over then current prices, and may limit the ability of stockholders to remove our current management or approve transactions that our stockholders may deem to be in their best interest and, therefore, could adversely affect the price of our common stock.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus contains forward-looking statements, principally in the sections entitled “Summary,” “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Business.” Generally, you can identify these statements because they include words such as “anticipate,” “estimate,” “plan,” “project,” “continuing,” “ongoing,” “expect,” “believe,” “intend,” “may,” “will,” “should,” “could,” and similar expressions to identify forward-looking statements. These statements are only predictions. Although we do not make forward-looking statements unless we believe we have a reasonable basis for doing so, we cannot guarantee their accuracy, and actual results may differ materially from those we anticipated due to a number of uncertainties, many of which cannot be foreseen. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this prospectus. Our actual results could differ materially from those anticipated in these forward-looking statements for many reasons including, among others, the risks we face that are described in the section entitled “Risk Factors” and elsewhere in this prospectus.
We believe it is important to communicate our expectations to our investors. There may be events in the future, however, that we are unable to predict accurately or over which we have no control. The risk factors listed on the previous pages, as well as any cautionary language in this prospectus, provide examples of risks, uncertainties and events that may cause our actual results to differ materially from the expectations we describe in our forward-looking statements. Before you invest in our common stock, you should be aware that the occurrence of the events described in the previous risk factors and elsewhere in this prospectus could negatively impact our business, operating results, financial condition and stock price.
Forward-looking statements include, but are not limited to, statements about:
  •  the progress and timing of our development programs, clinical trials and pursuit of regulatory approvals for product candidates in our development pipeline;
 
  •  our expectations and capabilities relating to the commercialization of our potential products and our product candidates in development;
 
  •  our ability to protect our intellectual property and operate our business without infringing on the intellectual property of others;
 
  •  our ability to compete with other companies that are developing or selling products that are competitive with our potential products;
 
  •  our estimates regarding future operating performance and capital requirements; and
 
  •  the impact of the Sarbanes-Oxley Act of 2002 and any future changes in accounting regulations or practices in general with respect to public companies.
Forward-looking statements speak only as of the date on which they are made and, except as required by law, we undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which the statement is made or to reflect the occurrence of unanticipated events. In addition, we cannot assess the impact of each factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

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USE OF PROCEEDS
We will have approximately $           million in net proceeds from the sale of our common stock in this offering at an assumed public offering price of $           per share, the midpoint of the range set forth on the cover of this prospectus, after deducting underwriting discounts and commissions and our estimated expenses. If the underwriters’ over-allotment option is exercised in full, we estimate that the net proceeds will be approximately $           million.
The principal purposes of this offering are to obtain additional working capital, establish a public market for our common stock and facilitate our future access to public markets. We expect to use the majority of the net proceeds of this offering to continue the development and prepare for the commercialization of our lead molecular imaging pharmaceutical candidate, Zemiva, and to initiate and expand the clinical development of Ultratrace MIBG, our lead targeted radiotherapeutic candidate for cancer.
In addition, we anticipate using a portion of the net proceeds of this offering to:
  •  expand our research and development programs (approximately $          );
 
  •  advance our pre-clinical development of new product candidates (approximately $          );
 
  •  initiate clinical development of additional indications for Zemiva (approximately $          );
 
  •  in-license technology and acquire or invest in businesses, products or technologies that are complementary to our own (approximately $          );
 
  •  fund investment in manufacturing capacity for Zemiva in collaboration with our anticipated commercial manufacturing partner(s) (approximately $          ); and
 
  •  fund other working capital and general corporate activities (approximately $          ).
We may also use a portion of the net proceeds for the repayment of $5 million in debt and related interest under the terms of a Loan and Security Agreement with Ritchie Multi-Strategy Global, L.L.C. dated as of September 30, 2005. The debt will be used for working capital and general corporate activities. The obligations are secured by a first priority security interest in our assets and intellectual property. We are required to pay interest only during the first three months of the term of this loan, and thereafter the entire loan will amortize over 35 months with equal monthly principal and interest payments. The interest rate of the loan is the lesser of (i) 395 basis points above the yield on the three-year U.S. Treasury Notes on the closing date of the loan and (ii) the maximum rate permitted by law. In addition, we may also use a portion of the net proceeds to pay Ritchie Multi-Strategy Global, L.L.C. a fee in the amount of $250,000 if we complete this offering prior to June 30, 2006 or in the amount of $300,000 if we complete an offering after such date.
We may also use a portion of the net proceeds to pay to certain existing preferred stockholders a one-time cash dividend in an aggregate amount of $          .
We may also use a portion of the net proceeds to acquire additional businesses, services, products or technologies or invest in additional businesses that we believe will complement our current or future business. However, we have no specific plans, agreements or commitments to do so and are not currently engaged in any negotiations for any acquisition or investment.
The amounts and timing of our use of proceeds will vary depending on a number of factors, including the amount of cash generated or used by our operations, the success of our product development efforts, competitive and technological developments, and the rate of growth, if any, of our business. As of the date of this prospectus, we cannot specify with certainty all of the particular uses for the net proceeds to be received upon the completion of this offering. Accordingly, our management will have broad discretion in the allocation of the net proceeds of this offering. Pending the uses described above, we will invest the net proceeds of this offering in cash, cash-equivalents, money market funds

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or short-term interest-bearing, investment-grade securities to the extent consistent with applicable regulations. We cannot predict whether the proceeds will be invested to yield a favorable return.
Based on our operating plans, we believe that the proceeds from this offering, together with our existing cash resources and government grant funding will be sufficient to finance our planned operations, including increases in spending for our Zemiva and MIBG clinical programs and for our preclinical product candidates through the second half of 2007.
DIVIDEND POLICY
We have never declared or paid any cash dividends on our capital stock. Contingent upon the closing of this offering, we intend to pay to certain existing preferred stockholders a one-time cash dividend in an aggregate amount of $          .  Following the completion of this offering and except for the one-time dividend payment to certain preferred holders, we anticipate that any earnings will be retained for development and expansion of our business and we do not anticipate paying any cash dividends in the foreseeable future on our common stock. Our Board of Directors has sole discretion to pay cash dividends based on our financial condition, results of operation, capital requirements, contractual obligations and other relevant factors. In the future, we may also obtain loans or other credit facilities that may restrict our ability to declare or pay dividends.

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CAPITALIZATION
The following table sets forth our capitalization as of June 30, 2005:
  •  on an actual basis;
 
  •  on a pro forma basis to reflect the conversion of all shares of preferred stock outstanding as of June 30, 2005 into                     shares of common stock upon the completion of this offering, the election of certain preferred stockholders to receive in the aggregate                     shares of common stock in lieu of a cash payment for accrued dividends and                     shares of common stock issuable upon the exercise of common stock warrants outstanding as of June 30, 2005 that will expire on or prior to the completion of this offering; and
 
  •  on a pro forma as adjusted basis to give effect to the sale of all of the shares of common stock in this offering at an assumed public offering price of $           per share, the mid-point of the range set forth on the cover of this prospectus, after deducting estimated underwriting discounts and commissions and our estimated offering expenses.
You should read this table in conjunction with our financial statements and related notes appearing elsewhere in this prospectus and with the sections of this prospectus entitled “Use of Proceeds,” “Description of Capital Stock” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”
                             
    As of June 30, 2005
     
        Pro Forma
    Actual   Pro Forma   As Adjusted
             
    (in thousands)
Redeemable convertible preferred stock, $0.01 par value; authorized 359,515 shares; 315,570 shares issued and outstanding
  $ 43,809                  
Stockholders’ (deficit) equity:
                       
 
Common stock, $0.01 par value; authorized, 115,000,000 shares; issued and outstanding, 26,466,283 shares
    265                  
 
Additional paid-in capital
    23,040                  
                   
 
Note receivable from officer/stockholder
    (296 )                
 
Deferred stock-based compensation
    (1,130 )                
                   
 
Deficit accumulated during the development stage
    (46,240 )                
                   
   
Total stockholders’ equity (deficit)
    (24,361 )                
                   
 
Total capitalization
  $ 19,448                  
                   
The above table does not include:
  •                       shares of common stock issuable upon the exercise of stock options outstanding as of                     , 2005, of which                     options having a weighted-average exercise price of $           per share were exercisable as of                     , 2005;
 
  •                       shares of common stock available for future grants under our 2005 Equity Incentive Plan; and
 
  •                       shares of our common stock that may be purchased by the underwriters pursuant to the underwriters over-allotment option.

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DILUTION
If you invest in our common stock, your interest will be diluted to the extent of the difference between the public offering price per share of our common stock and the pro forma as adjusted net tangible book value per share of our common stock after this offering. We calculate net tangible book value per share by calculating the total assets less intangible assets and total liabilities, and dividing it by the number of outstanding shares of common stock.
After giving effect to the sale of shares of common stock at an assumed initial public offering price of $           per share (less estimated underwriting discounts and commissions and estimated expenses), our pro forma net tangible book value as of June 30, 2005 would have been $                     , or $           per share. This represents an immediate increase in the pro forma as adjusted net tangible book value of $           per share to existing stockholders and an immediate dilution of $           per share to you, as illustrated in the following table:
                 
Assumed initial public offering price per share
          $    
Pro forma net tangible book value per share at June 30, 2005
  $            
Increase per share attributable to new investors
  $            
             
Pro forma net tangible book value per share after this offering
          $    
             
Dilution per share to new investors
          $    
             
The following table shows on a pro forma basis at June 30, 2005, the total number of shares of common stock purchased from us, the total consideration paid to us, and the average price per share paid by existing stockholders and by new investors before deducting the estimated underwriting discounts and commissions and estimated offering expenses payable by us:
                                           
    Shares Purchased   Total Consideration    
            Average Price
    Number   Percent   Amount   Percent   Per Share
                     
Existing stockholders (1)
                  $               $    
New investors
                                       
                               
 
Totals
            100%               100%          
                               
 
(1) Includes the conversion of all of our outstanding shares of preferred stock into                 shares of common stock upon the completion of this offering and the election of certain preferred stockholders to receive in the aggregate                 shares of common stock in lieu of a cash payment for accrued dividends. Also includes the exercise of outstanding warrants that will expire on or prior to the completion of this offering for                 shares of common stock.
You will experience additional dilution upon exercise of outstanding options. See “Management — 1997 Stock Option Plan.”

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SELECTED CONSOLIDATED FINANCIAL DATA
The selected consolidated financial data set forth below should be read in conjunction with our consolidated financial statements and related notes thereto and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this prospectus. The selected consolidated statements of operations data for the years ended December 31, 2002, 2003 and 2004 and the selected consolidated balance sheet data as of December 31, 2003 and 2004 are derived from our audited consolidated financial statements included elsewhere in this prospectus. The selected consolidated statements of operations data for the six months ended June 30, 2004 and 2005 and for the period from January 10, 1997 (Date of Inception) to June 30, 2005, and the selected consolidated balance sheet data as of June 30, 2005, are derived from our unaudited consolidated financial statements included elsewhere in this prospectus. The consolidated statements of operations data for the years ended December 31, 2000 and 2001 and the selected consolidated balance sheet data as of December 31, 2000, 2001 and 2002 are derived from audited consolidated financial statements not included in this prospectus. The historical results are not necessarily indicative of results to be expected in any future period.
                                                                   
                                Period From
                            January 10, 1997
        Six Months   (Date of Inception)
    Year Ended December 31,   Ended June 30,   to June 30,
             
    2000   2001   2002   2003   2004   2004   2005   2005
                                 
    (in thousands, except per share data)
Consolidated Statements of Operations Data:
                                                               
Revenue-research and development grants
  $ 616     $ 214     $ 624     $ 723     $ 569     $ 248     $ 427     $ 3,285  
Operating expenses:
                                                               
 
Research and development
    3,269       3,081       2,317       2,774       5,381       1,988       3,990       23,784  
 
General and administrative
    1,614       1,404       1,562       1,266       3,520       1,525       3,042       16,423  
 
Amortization of licensed patent rights (1)
    2,713       3,256       3,798                               9,767  
                                                 
Total operating expenses
    7,596       7,741       7,677       4,040       8,901       3,513       7,032       49,974  
                                                 
Loss from operations
    (6,980 )     (7,527 )     (7,053 )     (3,317 )     (8,332 )     (3,265 )     (6,605 )     (46,689 )
                                                 
Other (expense) income:
                                                               
 
Interest income
    84       32       3       1       20       11       133       301  
 
Interest expense
          (10 )     (6 )     (3 )     (3 )     (1 )     (7 )     (28 )
 
Interest expense — related parties
                (28 )     (29 )                       (57 )
 
Management fee income — related party
    33                                           233  
                                                 
Total other (expense) income, net
    117       22       (31 )     (31 )     17       10       126       449  
                                                 
Net loss
    (6,863 )     (7,505 )     (7,084 )     (3,348 )     (8,315 )     (3,255 )     (6,479 )     (46,240 )
Redeemable convertible preferred stock dividends and accretion of issuance costs
                      (613 )     (1,312 )     (638 )     (1,710 )     (3,635 )
                                                 
Net loss attributable to common stockholders
  $ (6,863 )   $ (7,505 )   $ (7,084 )   $ (3,961 )   $ (9,627 )   $ (3,893 )   $ (8,189 )   $ (49,875 )
                                                 
Basic and diluted net loss per share attributable to common stockholders
  $ (0.78 )   $ (0.72 )   $ (0.63 )   $ (0.19 )   $ (0.43 )   $ (0.18 )   $ (0.33 )        
                                                 
Weighted average shares used to compute basic and diluted net loss per share attributable to common stockholders
    8,832       10,437       11,275       21,090       22,641       21,981       25,039          
                                                 
footnotes on following page

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    As of December 31,   As of June 30,
         
    2000   2001   2002   2003   2004   2005
                         
    (in thousands)
Consolidated Balance Sheet Data:
                                               
Cash and cash equivalents (2)
  $ 2,284     $ 1,217     $ 13     $ 1,711     $ 846     $ 21,153  
Working capital (deficit) (2)
    1,901       (2,172 )     (2,128 )     (1,709 )     (2,566 )     19,148  
Total assets (1)
    9,801       5,331       212       2,232       1,573       21,912  
Long term obligations, net of current portion
    41       24       5       158       113       90  
Redeemable convertible preferred stock (2)
                      7,552       15,538       43,809  
Total stockholders’ (deficit) equity
    9,288       1,846       (5,238 )     (9,023 )     (17,831 )     (24,361 )
 
(1) The significant reduction in total assets in 2000, 2001 and 2002 and in the decrease in amortization expense related to licensed patent rights in periods subsequent to 2002 results from the amortization of licensed patent rights, which was fully amortized through December 31, 2002. The significant increase in total assets from December 31, 2004 to June 30, 2005 is a result of cash received for the issuance of Series C redeemable convertible preferred stock in March and April of 2005.
 
(2) The significant changes in cash and cash equivalents, working capital (deficit) and redeemable convertible preferred stock as of December 31, 2003, 2004 and June 30, 2005 from the previous periods presented result from cash received from the issuance of redeemable convertible preferred stock during the periods then ended.

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MANAGEMENT’S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS
When you read this section of this prospectus, it is important that you also read the financial statements and related notes included elsewhere in this prospectus. This section of this prospectus contains forward-looking statements that involve risks and uncertainties, such as statements of our plans, objectives, expectations, and intentions. We use words such as “anticipate,” “estimate,” “plan,” “project,” “continuing,” “ongoing,” “expect,” “believe,” “intend,” “may,” “will,” “should,” “could,” and similar expressions to identify forward-looking statements. Our actual results could differ materially from those anticipated in these forward-looking statements for many reasons, including the factors described below and in the “Risk Factors” section of this prospectus.
Overview
We are a development stage company. We were organized and commenced operations in 1997 to provide a platform to develop and commercialize biopharmaceutical products. We have devoted substantially all of our efforts towards the research and development of our product candidates. We have had no revenue from product sales and have funded our operations through the private placement of equity securities, debt financings and government grant funding. We have never been profitable and have incurred a cumulative net loss of $46.2 million from inception through June 30, 2005.
We expect to incur significant operating losses for the next several years. Research and development expenses relating to our product candidates will continue to increase. In particular, we expect to incur increased development costs in connection with clinical trials of Zemiva which we expect to commence in the first half of 2006. General and administrative costs will increase as we prepare for the commercialization of our product candidates and as we begin to operate as a public company.
Financial Operations Overview
Revenue. Our revenue to date has been derived from National Institutes of Health, or NIH, grants. We have not had any product sales and do not expect product sales in the near future. In the future, we will seek to generate revenue from a combination of product sales and collaborative or strategic relationships as well as from further grants.
Research and Development Expense. Research and development expense consists of expenses incurred in developing and testing product candidates. These expenses consist primarily of salaries and related expenses for employees as well as fees for consultants engaged in research and development activities, fees paid to professional service providers for monitoring our clinical trials and for acquiring and evaluating clinical trial data, costs of contract manufacturing services and materials used in clinical trials, depreciation of capital resources used to develop our product candidates and facilities costs. We expense research and development costs as incurred. Certain research and development activities are partially funded by NIH grants described above. All costs related to such grants are included in research and development costs. We believe that significant investment in product development is necessary and plan to continue these investments as we seek to develop our product candidates and proprietary technologies.
General and Administrative Expense. General and administrative expense consists primarily of salaries and other related costs for personnel in executive, finance, accounting, information technology and human resource functions. Other costs include facility costs not otherwise included in research and development expense, legal fees relating to patent and corporate matters and fees for accounting services.
Stock-Based Compensation Expense. Operating expenses include stock-based compensation expense. Stock-based compensation expense results from the issuance of stock-based awards such as options

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and restricted stock to employees, members of the Board of Directors and consultants in lieu of cash consideration for services received. We use the intrinsic value method of accounting for awards to employees and members of the Board of Directors. We use the fair value method of accounting for all other awards. In 2005, we hired an independent third party to assist in determining the fair value of our common stock in 2004 and 2005 for the purpose of determining compensation expense. Compensation expense for options and restricted stock granted to employees and nonemployees is classified either as research and development expense or general and administrative expense based on job function of the individual receiving the grant. See discussion under “Critical Accounting Policies and Estimates — Stock-Based Compensation.”
Other (Expense) Income, Net. Other (expense) income, net includes interest income and interest expense. Interest income consists of interest earned on our cash, cash equivalents and short-term investments. Interest expense consists of interest incurred on equipment leases and on debt instruments.
Redeemable Convertible Preferred Stock Dividends and Accretion of Issuance Costs. Redeemable convertible preferred stock dividends and accretion of issuance costs consists of cumulative, undeclared dividends payable on the securities and accretion of the issuance costs and costs allocated to issued warrants to purchase common stock. The issuance costs on these shares and warrants were recorded as a reduction to the carrying value of the redeemable convertible preferred stock when issued, and are accreted to redeemable convertible preferred stock using the interest method through the earliest redemption dates of each series of redeemable convertible preferred stock (A, B and C) by a charge to additional paid-in capital and net loss attributable to common stockholders. Upon the completion of this offering, the redeemable convertible preferred stock automatically converts into common stock on a 200-for-1 basis and the cumulative but unpaid dividends are either convertible into common stock (based upon formulas established at each issuance date of the securities) or payable in cash (at the accrued amount), at the election of each holder of the redeemable convertible preferred stock. Accordingly, upon completion of this offering, we will no longer record dividends and accretion on the redeemable convertible preferred stock.
Critical Accounting Policies and Estimates
Our discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities and expenses. On an on-going basis, we evaluate our estimates and judgments, including those related to accrued expenses, fair valuation of stock related to stock-based compensation and income taxes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements.
Accrued Expenses. As part of the process of preparing consolidated financial statements, we are required to estimate accrued expenses. This process involves identifying services that have been performed on our behalf and estimating the level of services performed and the associated cost incurred for such services as of each balance sheet date in our consolidated financial statements. Examples of estimated expenses for which we accrue include professional service fees such as legal and accounting fees; contract service fees such as fees paid to clinical monitors, data management organizations and investigators in conjunction with clinical trials; fees paid to contract manufacturers in conjunction with the production of clinical materials; and employee bonuses. In connection with such service fees, our estimates are most affected by our understanding of the status and timing of

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services provided relative to the actual levels of services incurred by such service providers. The majority of our service providers invoice us monthly in arrears for services performed. In the event that we do not identify certain costs which have begun to be incurred, or we under- or over-estimate the level of services performed or the costs of such services, our reported expenses for such period would be too low or too high. Determining the date on which certain services commence, the level of services performed on or before a given date and the cost of such services often involves judgment. We make these judgments in accordance with GAAP based upon the facts and circumstances known to us. We attempt to mitigate the risk of inaccurate estimates, in part, by communicating with our service providers when other evidence of costs incurred is unavailable.
Stock-Based Compensation. We issue stock awards such as options and restricted stock to employees, members of the Board of Directors and consultants for incentive purposes and in lieu of cash consideration for services received. We use the intrinsic value method of accounting for awards to employees and members of the Board of Directors (collectively referred to as employees for purposes of stock-based compensation) rather than the alternative fair value accounting method provided for under Statement of Financial Accounting Standards, or SFAS No. 123, Accounting for Stock-Based Compensation. Accordingly, we have not recorded stock-based compensation expense for stock awards issued to employees in fixed amounts with exercise prices at least equal to the fair value of the underlying common stock on the measurement date. If all terms are fixed, the measurement date is the date of grant. Stock-based compensation to the extent the fair value of our common stock exceeds the exercise price of stock options granted to employees on the measurement date is recorded as deferred stock-based compensation in the equity section of the consolidated balance sheets and is amortized on a straight-line basis over the vesting period of the awards in the consolidated statement of operations. In the notes to our consolidated financial statements, we provide pro forma disclosures in accordance with SFAS No. 123 and related pronouncements and SFAS No. 148, Accounting for Stock-Based Compensation-Transition and Disclosure.
We use the fair value method of accounting for all other awards. For stock options granted to nonemployees, the fair value of the stock options is estimated using the Black-Scholes valuation model. This model utilizes the estimated fair value of the common stock and requires that, at the measurement date of the award, which is usually the date services are completed, we make assumptions with respect to the expected life of the option, the volatility of the fair value of the common stock, risk free interest rates and expected dividend yields of our common stock. Higher estimates of volatility and expected life of the option increase the value of an option and the resulting expense. Stock-based compensation computed on awards to nonemployees is recognized over the period of expected service by the nonemployee (which is generally the vesting period). As the service is performed, we are required to update these assumptions and periodically revalue unvested options and make adjustments to the stock-based compensation expense using the new valuation. These adjustments may result in additional or less stock-based compensation expense than originally estimated or recorded, with a corresponding increase or decrease in compensation expense in the consolidated statements of operations in the periods of re-measurement. Ultimately, the final compensation charge for each option grant to nonemployees is unknown until the performance of services is completed. We account for transactions in which services are received in exchange for equity instruments based either on the fair value of such services received from nonemployees or of the equity instruments issued, whichever is more reliably measured. The two factors which most effect charges or credits to operations related to stock-based compensation for nonemployee awards are the fair value of the common stock underlying stock options for which such stock-based compensation is recorded and the volatility of such fair value.
The determination of the deemed fair value of our common stock has involved significant judgments, assumptions, estimates and complexities that impact the amount of deferred stock-based compensation recorded and the resulting amortization in future periods. If we had made different assumptions, the amount of our deferred stock-based compensation, stock-based compensation expense, operating loss, net loss attributable to common stockholders and net loss per share attributable to common

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stockholders amounts could have been significantly different. We believe that we have used reasonable methodologies, approaches and assumptions to determine the fair value of our common stock and that stock-based deferred compensation and related amortization have been recorded properly for accounting purposes.
Effective January 1, 2006, we must adopt new accounting provisions pursuant to the requirements of SFAS 123(R), Share-Based Payment , or SFAS 123(R). SFAS 123(R) addresses all forms of share-based payment awards, including shares issued under employee stock purchase plans, stock options, restricted stock and stock appreciation rights. SFAS 123(R) will require us to expense share-based payment awards measured at fair value. We continue to evaluate the effect that the adoption of SFAS 123(R) will have on our financial position and results of operations. We currently expect that our adoption of SFAS 123(R) may result in additional expense for historical option awards, thereby materially impacting our operating results in future periods.
Income Taxes. As part of the process of preparing our consolidated financial statements, we are required to estimate our income tax expense in each of the jurisdictions in which we operate. This process involves us estimating our current tax expense together with assessing temporary differences resulting from differing treatments of items for tax and financial reporting purposes. These differences result in deferred tax assets and liabilities. As a result of our historical operating losses, as of December 31, 2004, we had federal tax net operating loss carryforwards of $20.4 million and research and development tax credits of $1.2 million, which expire at various dates through 2024. As of December 31, 2004 we had a deferred tax asset aggregating $11.4 million. We have recorded a full valuation allowance of these otherwise recognizable deferred tax assets due to the uncertainty surrounding the timing of the realization of the tax benefit. In the event that we determine in the future that we will be able to realize all or a portion of the deferred tax asset, a reduction in the deferred tax valuation allowance would increase net income or reduce the net loss in the period in which such a determination is made. The Tax Reform Act of 1986 contains provisions that limit the utilization of net operating loss carryforwards and credits available to be used in any given year in the event of significant changes in ownership interest, as defined. The amount of the net operating loss carryforwards that may be utilized to offset future taxable income, when earned, may be subjected to certain limitations, based upon changes in the ownership of our stock that have and/or may occur. We have not conducted an evaluation as to whether any portion of our tax loss carryforwards have been limited, and therefore, based upon the changes in ownership, a limitation may have occurred.
Results of Operations
Six months ended June 30, 2004 and 2005
Revenue — Research and Development Grants. Revenue increased $179,000, or 72%, to $427,000 for the six months ended June 30, 2005 from $248,000 for the six months ended June 30, 2004. During each of the 2005 and 2004 periods we received funding under eight grants with the majority of reimbursable expenses recorded in the 2005 period.
Research and Development Expense. Research and development expense increased $2.0 million, or 101%, to $4.0 million for the six months ended June 30, 2005 from $2.0 million for the six months ended June 30, 2004. The six months ended June 30, 2004 included the Phase 2a Zemiva clinical trial costs, while the six months ended June 30, 2005 included costs for the Phase 2b Zemiva clinical trial which began in the second half of 2004 and continued through the first half of 2005. The Phase 2b clinical trial enrolled a significantly greater number of patients, resulting in an increase of approximately $1.2 million from the 2004 to the 2005 period. Also, contributing to the increase was the growth in the number of research and development personnel which resulted in $600,000 of additional expense in the 2005 period relative to the 2004 period. Stock-based compensation contributed to a lesser extent to the increase, increasing by $50,000 to $68,000 in the 2005 period from $18,000 in the 2004 period.

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As clinical sites are initiated and patients are enrolled in our clinical programs, we anticipate incurring increased costs from professional service firms helping to support the clinical program by performing independent clinical monitoring, data acquisition and data evaluation. We also anticipate incurring increased costs related to hiring of additional research and development and clinical personnel and increased costs associated with production and distribution of clinical trial material. We also expect that our research and development expense will increase as we pursue the identification and development of other product candidates, which we plan to fund through our own resources or through strategic collaborations.
General and Administrative Expense. General and administrative expense increased $1.5 million, or 99%, to $3.0 million for the six months ended June 30, 2005 from $1.5 million for the six months ended June 30, 2004. Of the increase, $700,000 resulted primarily from legal fees associated with stockholder litigation, patent applications, patent management and general corporate representation. Also contributing to the increase was growth in administrative headcount of three (from five to eight personnel) which amounted to $366,000 of additional expense from the 2004 to 2005 period. Stock-based compensation increased $364,000 to $606,000 in the 2005 period increasing from $242,000 in the 2004 period, due primarily to the effect of an increase in the fair value of our common stock on unvested restricted shares of common stock.
After completing this offering, we anticipate greater general and administrative expenses, such as increased costs for investor relations, Sarbanes-Oxley compliance and other activities associated with operating as a publicly-traded company. These increases will also likely include the hiring of additional personnel. We expect to continue to incur greater internal and external business development costs to support our various product development efforts, which can vary from period to period.
Other (Expense) Income, Net. Other income, net increased $115,000 to $126,000 for the six months ended June 30, 2005 from $11,000 for the six months ended June 30, 2004. During the six months ended June 30, 2005 and 2004, interest income was $133,000 and $12,000, respectively, and other interest expense was $7,000 and $1,000, respectively. The increase in interest income for the six months ended June 30, 2005 compared to the six months ended June 30, 2004 was primarily due to increased yields on investments resulting from greater average cash balances available for investment as a result of the sales of Series C redeemable convertible preferred stock in March and April of 2005.
Redeemable Convertible Preferred Stock Dividends and Accretion of Issuance Cost. Redeemable convertible preferred stock dividends and accretion of issuance costs increased to $1.7 million for the six months ended June 30, 2005 from $638,000 for the six months ended June 30, 2004. This increase was attributable to Series B redeemable convertible preferred stock outstanding for the entire 2005 period plus the Series C redeemable convertible preferred stock outstanding for a portion of the 2005 period. Also contributing to the increase in the 2005 period was a special dividend accrued related to the Series A redeemable convertible preferred stock in February 2005. Upon completion of this offering no redeemable convertible preferred stock will be outstanding, and, accordingly, there will be no further accrual of dividends or accretion of issuance costs on these shares.
Years Ended December 31, 2004 and 2003
Revenue — Research and Development Grants. Revenue decreased $154,000 or 21% to $569,000 for 2004 from $723,000 for 2003. During 2004 and 2003 we received funding under eight and six grants, respectively, with the majority of reimbursable expenses recorded in 2003.
Research and Development Expense. Research and development expense increased $2.6 million, or 94%, to $5.4 million for 2004 from $2.8 million for 2003. The increase resulted primarily from Phase 2b clinical trial costs for Zemiva. The Phase 2a clinical trial was completed in the first quarter of 2003 and Phase 2b, which commenced in the second half of 2004, had greater than three times the number of patients (105 versus 32) and greater than twice as many sites (10 versus 4) than Phase 2a. Clinical trial costs increased by $1.6 million from 2003 to 2004. Also contributing to the increase

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were increased consulting costs of approximately $570,000 in 2004, primarily for Zemiva, and general research and development costs. Personnel and related costs increased by $300,000 for 2004 due to an increase in staffing and bonuses. The increase costs were offset in part by a decrease in stock-based compensation of $188,000 to $48,000 for 2004 from $236,000 for 2003. In 2003 certain employees received stock in lieu of cash bonuses.
The balance of our research and development expense primarily consisted of indirect costs, such as costs for facilities and depreciation, as well as preclinical evaluation of other product candidates.
As clinical sites are initiated and patients are enrolled in our clinical programs, we anticipate incurring increased costs from professional service firms helping to support the clinical program by performing independent clinical monitoring, data acquisition and data evaluation. We anticipate incurring increased costs related to hiring additional research and development and clinical personnel and increased costs associated with production and distribution of clinical trial material. We also expect that our research and development expense will increase as we pursue the identification and development of other product candidates, which we plan to fund through our own resources or through strategic collaborations.
General and Administrative Expense. General and administrative expense for 2004 was $3.5 million compared to $1.3 million in 2003, an increase of $2.2 million or 178%. In 2004, legal costs related to stockholder litigation increased by $550,000 from 2003 and personnel costs, including bonuses increased by $560,000. Contributing to the increase was business consultant costs of $400,000, advertising, marketing studies and investor relations costs of $235,000 and accounting and auditing fees of $75,000, all of which increased for the period 2004. Stock-based compensation contributed to the increase to a lesser extent, with an increase of $55,000 to $311,000 in 2004 from $257,000 in 2003.
After completing this offering, we anticipate higher general and administrative expenses, such as increased costs for investor relations, Sarbanes-Oxley compliance and other activities associated with operating as a publicly-traded company. These increases will also likely include the hiring of additional personnel. We intend to continue to incur greater internal and external business development costs to support our various product development efforts, which can vary from period to period.
Other (Expense) Income, Net. Other income, net increased to $16,000 for 2004 from a net expense of $30,000 for 2003. During 2004 and 2003, interest income was $20,000 and $1,000, respectively, and interest expense was $3,000 and $32,000, respectively. The increase in interest income for 2004 compared to 2003 was primarily due to greater average cash balances available for investment, due to the sales of Series B redeemable convertible preferred stock. The decrease in interest expense was due to a decrease in indebtedness as a result of the conversion of promissory notes to Series B redeemable convertible stock.
Redeemable Convertible Preferred Stock Dividends and Accretion of Issuance Costs. Redeemable convertible preferred stock dividends and accretion of issuance costs increased to $1.3 million for 2004 and $613,000 for 2003. This increase is the result of the accrual of dividends on the Series B redeemable convertible preferred stock issued in 2004. Upon completion of this offering, no redeemable convertible preferred stock will be outstanding, and, accordingly, there will be no further accrual of dividends and accretion issuance costs on these shares.
Years Ended December 31, 2003 and 2002
Revenue — Research and Development Grants. Revenue increased $99,000, or 16%, to $723,000 for 2003 from $624,000 for 2002. During each of 2003 and 2002 we received funding under six grants, with the majority of reimbursable expenses recorded in 2003.
Research and Development Expense. Research and development expense increased $458,000, or 20%, to $2.8 million for the year ended December 31, 2003 from $2.3 million for 2002. The increase

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was due primarily to increased personnel and related costs. Stock-based compensation contributed with an increase of $239,000 to $236,000 for 2003 from ($3,000) for 2002. This increase was due primarily to certain employees receiving stock in lieu of cash bonuses in the 2003 period.
General and Administrative Expense. General and administrative expense decreased $300,000, or 19%, to $1.3 million for 2003 compared to $1.6 million for 2002. The change was primarily the result of decreased legal fees. Stock-based compensation increased to $257,000 for 2003 from $0 for 2002 due primarily to certain employees receiving stock in lieu of cash bonuses for the 2003 period.
Other (Expense) Income, Net. Other expense, net was approximately $30,000 for 2003 and $31,000 for 2002. This interest expense was directly related to promissory notes related to Series B stock subscriptions.
Amortization of License Patent Rights. On February 29, 2000, we acquired all of the outstanding stock of Biostream Therapeutics Incorporated and applied purchase accounting to the transaction. The acquired licensed patent rights of $9.8 million were assigned a three-year useful life. During 2002, we accelerated the amortization of this intangible asset as we were no longer pursuing the underlying research. Accordingly, we fully amortized the asset as of December 31, 2002. Amortization expense was $3.8 million in 2002.
Redeemable Convertible Preferred Stock Dividends and Accretion of Issuance Costs. Redeemable convertible preferred stock dividends and accretion of issuance costs totaled $613,000 for 2003 for Series A redeemable convertible preferred stock issued in 2003. Upon completion of this offering, no redeemable convertible preferred stock will be outstanding, and, accordingly, there will be no further accrual of dividends and accretion issuance costs on these shares.
Liquidity and Capital Resources
Historically, we have financed our business primarily through the issuance of equity securities, revenues from government grants, debt financings and equipment leases. Through June 30, 2005, we had received net cash proceeds of $49.2 million from the issuance of shares of preferred and common stock and $3.3 million from government grants. At June 30, 2005, we had $21.2 million in cash and cash equivalents available to finance future operations. Our cash and cash equivalents were held at one financial institution at June 30, 2005. Subsequent to June 30, 2005, cash equivalents were moved to several institutions to reduce our concentration. Management believes that all of the financial institutions it uses are of high credit quality.
Since our inception, we have generated significant losses in developing our product candidates. Accordingly, we have historically used cash in our operating activities, and for the six months ending June 30, 2005 we used approximately $6.4 million to fund these activities. As we continue to develop our product candidates and begin to incur increased sales and marketing costs related to commercialization of our future products, we expect to incur additional operating losses until such time, if any, as our efforts result in commercially viable products.
Based on our operating plans, we believe that the proceeds from this offering, together with our existing cash resources and government grant funding, will be sufficient to finance our planned operations through the second half of 2007. However, over the next several years, we will require significant additional funds to conduct clinical and non-clinical trials, achieve regulatory approvals and, subject to such approvals, commercially launch Zemiva and MIBG. Our future capital requirements will depend on many factors, including the scope of progress made in our research and development activities and our clinical trials. We may also need additional funds for possible future strategic acquisitions of businesses, products or technologies complementary to our business. If additional funds are required, we may raise such funds from time to time through public or private sales of equity or from borrowings. Financing may not be available to us on acceptable terms, or at all, and our failure to raise capital when needed could materially adversely impact our growth plans

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and our financial condition and results of operations. Additional equity financing may be dilutive to holders of our common stock and debt financing, if available, may involve significant cash payment obligations and covenants that restrict our ability to operate our business.
Cash flows for six months ended June 30, 2004 and 2005
Net cash used in operating activities increased by $3.7 million to $6.3 million for the six months ended June 30, 2005 compared to $2.6 million for the same period in 2004. The increase in cash used was due to the increase in the net loss of $3.3 million primarily related to expenditures on the Phase 2b clinical trial for Zemiva.
Net cash used by investing activities decreased $53,000 to $96,000 for the six months ended June 30, 2005 compared to $149,000 for the same period in 2004. This decrease was due to the expansion of research facilities in 2004.
Net cash provided by financing activities increased by $21.9 million to $26.7 million for the six months ended June 30, 2005 compared to $4.8 million for the same period in 2004. In the six months ended June 30, 2005, we raised $26.4 million from the issuance of Series C redeemable convertible preferred stock, and in the 2004 period, we raised $4.7 million from the issuance of Series B redeemable convertible preferred stock, all net of expenses incurred.
Annual cash flows
Years ended December 31, 2004 and 2003
Net cash used in operating activities increased $3.2 million from $3.0 million for 2003 to $6.2 million for 2004. This increase in cash used in operations is due primarily to the significant increase in clinical trial activity surrounding Zemiva.
Net cash used by investing activities increased by $177,000, from $26,000 in 2003 to $203,000 in 2004. Net cash used in investing activities in 2003 was primarily for office leasehold improvements and the purchase of property and equipment. In 2004 net cash used in investing activities was primarily for expansion of research facilities and the purchase of property and equipment.
Net cash provided by financing activities increased by $0.8 million, from $4.8 million in 2003 to $5.5 million in 2004. In 2004, we raised $4.7 million in Series B redeemable convertible preferred stock, received $250,000 in cash from the sale of common stock and warrants and issued $700,000 in promissory notes. In 2003, we received proceeds of $2.7 million from the issuance of Series A redeemable convertible preferred stock and $2.1 million in advances for Series B stock subscriptions.
Years ended December 31, 2003 and 2002
Net cash used in operating activities increased by $700,000, from $2.3 million in 2002 to $3.0 million in 2003. Accounts payable and accrued expenses increased by $860,000 in the 2002 period due to limited cash resources. In 2003, there was a decrease in accounts payable and accrued expenses of $275,000.
Net cash used in investing activities remained fairly constant at $26,000 in 2003 from $25,000 in 2002. The use of cash in both years related primarily to the purchase of property and equipment.
Net cash provided by financing activities increased $3.6 million, from $1.2 million in 2002 to $4.8 million in 2003. In 2003, we raised $2.7 million in Series A redeemable convertible preferred stock and received $2.1 million in advances for Series B stock subscriptions. In 2002, we received $572,000 in stock subscriptions for Series A and $550,000 from the issuance of promissory notes and warrants.

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Contractual Obligations
The following table summarizes our outstanding contractual obligations as of June 30, 2005:
                                         
    Payments Due by Period
     
        Less than       More than
Contractual Obligations   Total   1 Year   1-3 Years   3-5 Years   5 Years
                     
    (in thousands)
Operating leases
  $ 736     $ 123     $ 613     $     $  
Development and manufacturing (1)
    427       427                    
                               
    $ 1,163     $ 550     $ 613     $     $  
                               
 
(1) See “Strategic Agreements — Manufacturing Agreement with MDS Nordion.”
Operating Leases
Our commitments under operating leases consist of payments relating to our real estate leases in Cambridge, Massachusetts, expiring in 2008. The commitments are $123,000, $251,000, $241,000 and $121,000 for the years 2005 (balance of year), 2006, 2007 and 2008, respectively.
Capital Leases
We have no capital leases as of June 30, 2005.
Debt
In December 2004, we issued an unsecured convertible promissory note for $700,000, due one year from the date of issuance, at an annual rate of 3%. In 2005, the principal balance of $700,000 plus accrued interest of $6,000 were converted into 3,493 shares of Series C redeemable convertible preferred stock.
On September 30, 2005, we entered into a $5 million Loan and Security Agreement with Ritchie Multi-Strategy Global, LLC. The debt will be used for working capital and general corporate activities. The obligations are secured by a first priority security interest in our assets and intellectual property. We are required to pay interest only during the first three months of the term of the loan, and thereafter the entire loan will amortize over 35 months with equal monthly principal and interest payments. The interest rate of the loan is the lesser of (i) 395 basis points above the yield on the three-year U.S. Treasury Notes on the closing date of the loan and (ii) the maximum rate permitted by law. In addition, we are required to pay Ritchie Multi-Strategy Global, L.L.C a fee in the amount of $250,000 if we complete this offering prior to June 30, 2006, and if completed thereafter, the fee would be in the amount of $300,000.
Off-Balance Sheet Arrangements
Other than the operating leases for our office, pilot manufacturing and laboratory space, we do not engage in off-balance sheet financing arrangements.
Strategic Agreements
Manufacturing Agreement with MDS Nordion
We have entered into a development and manufacturing agreement with MDS Nordion to produce Zemiva for our clinical trial studies. Zemiva is labeled with MDS Nordion’s high-purity I-123 and is manufactured in a new cyclotron facility in Vancouver, Canada. MDS Nordion is a manufacturer of I-123 production systems and the major supplier of I-123 in North America. The agreement obligates

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us to make certain milestone payments as well as payments for clinical product to be used in the Phase 3 clinical trials for Zemiva. The agreement currently expires on December 31, 2006 unless extended by mutual agreement of the parties. During 2004 and the six months ended June 30, 2005 we made payments to MDS Nordion of $819,000 and $29,000, respectively. We expect to pay MDS Nordion an additional $427,000, provided that MDS Nordion completes certain milestones set forth in the agreement. Future payments for clinical materials are at a contractual rate and based on our material needs.
License Agreements with Georgetown University
We have entered into two license agreements with Georgetown University. Pursuant to the first agreement, we have licensed on an exclusive basis in the field of imaging applications, the use of ligands for metabotropic glutamate receptors and inhibitors of NAALADase. In exchange for these exclusive rights, we are obligated to pay certain royalties and up to $900,000 in total of milestone payments upon the attainment of certain approvals in the regulatory process. Such milestone payments may be reduced by up to 50% for subsequent new drug applications submitted for new uses of the same compound and are creditable against future royalty payments. Pursuant to the second license, we have exclusive rights to analogs of cocaine, for the therapeutic and diagnostic uses of these compounds in substance abuse, obesity, depression, Parkinson’s disease and related neuropsychological conditions and diseases. In exchange for these exclusive rights, we are obligated to pay certain royalties and up to $800,000 in total of milestone payments upon the attainment of certain approvals in the regulatory process. Such milestone payments may be reduced by up to 50% for subsequent new drug applications submitted for new uses of the same compound and are creditable against future royalty payments.
License Agreement with the University of Western Ontario
We have entered into a license agreement with the University of Western Ontario pursuant to which we license the patent rights to certain polymer precursors used in the creation of the BMIPP molecule on an exclusive basis. While the university retains the ownership of the patent rights, we shall own any improvements to the technology made by us or on our behalf. In exchange for these exclusive rights, we are obligated to pay to the University of Western Ontario certain royalty and milestone payments. The license terminates with respect to each patent on the earlier of July 30, 2023, or the date the applicable patent expires and the period of exclusivity terminates upon the expiration of each patent in each country.
License Agreement with Nihon Medi-Physics Co. Ltd.
We have entered into a license agreement with Nihon Medi-Physics Co. Ltd., or Nihon, for access to its non-patented, confidential clinical information related to its BMIPP product, Cardiodine. As part of this agreement, we pay Nihon certain royalties on net sales of our Zemiva product for its first indication, if the use of Nihon’s clinical data enables us to omit or limit any of the clinical trial phases in the U.S. regulatory approval process for Zemiva. While we have used the data from Nihon in a supportive manner, we have not been able to omit or limit the clinical trials in support of a new drug application, or NDA, for Zemiva, therefore, do not expect to pay any royalties to Nihon upon sales of Zemiva.
Funding Requirements
We expect to use the majority of the net proceeds of this offering to continue the development and prepare for the commercialization of our lead product candidate, Zemiva, and to initiate and expand the clinical development of Ultratrace MIBG, our lead targeted radiotherapeutic candidates for cancer.

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To a lesser extent, we anticipate using the net proceeds of this offering to:
  •  expand our research and development programs (approximately $          );
 
  •  advance our pre-clinical development of new product candidates (approximately $          );
 
  •  initiate clinical development of additional indications for Zemiva (approximately $          );
 
  •  in-license technology and acquire or invest in businesses, products or technologies that are complementary to our own (approximately $          );
 
  •  fund investment in manufacturing capacity for Zemiva in collaboration with our anticipated commercial manufacturing partner(s) (approximately $          ); and
 
  •  fund other working capital and general corporate activities (approximately $          ).
We may also use a portion of the net proceeds for the repayment of $5 million in debt and related interest under the terms of a Loan and Security Agreement with Ritchie Multi-Strategy Global, L.L.C. dated as of September 30, 2005. For a description of the terms of the loan, see “Debt” above.
We may also use a portion of the net proceeds to pay to certain existing preferred stockholders a one-time cash dividend in an aggregate amount of $          .
We may also use a portion of the net proceeds to acquire additional businesses, services, products or technologies or invest in additional businesses that we believe will complement our current or future business. However, we have no specific plans, agreements or commitments to do so and are not currently engaged in any negotiations for any acquisition or investment.
The amounts and timing of our use of proceeds will vary depending on a number of factors, including the amount of cash generated or used by our operations, the success of our product development efforts, competitive and technological developments, and the rate of growth, if any, of our business. As of the date of this prospectus, we cannot specify with certainty all of the particular uses for the net proceeds to be received upon the completion of this offering. Accordingly, our management will have broad discretion in the allocation of the net proceeds of this offering. Pending the uses described above, we will invest the net proceeds of this offering in cash, cash-equivalents, money market funds or short-term interest-bearing, investment-grade securities to the extent consistent with applicable regulations. We cannot predict whether the proceeds will be invested to yield a favorable return.
We believe that the net proceeds from this offering, together with our existing cash resources and government grant funding, will be sufficient to finance our planned operations, including increases in spending for our Zemiva and MIBG clinical programs and for our preclinical product candidates through the second half of 2007. However, over the next several years, we will require significant additional funds to conduct clinical and non-clinical trials, achieve regulatory approvals and, subject to such approvals, commercially launch Zemiva and Ultratrace MIBG. Our future capital requirements will depend on many factors, including the scope of progress made in our research and development activities and our clinical trials. We may also need additional funds for possible future strategic acquisitions of businesses, products or technologies complementary to our business. If additional funds are required, we may raise such funds from time to time through public or private sales of equity or from borrowings. Financing may not be available to us on acceptable terms, or at all, and our failure to raise capital when needed could materially adversely impact our growth plans and our financial condition and results of operations. Additional equity financing may be dilutive to holders of our common stock and debt financing, if available, may involve significant cash payment obligations and covenants that restrict our ability to operate our business.
Recent Accounting Pronouncements
In December 2004, the Financial Accounting Standards Board issued SFAS No. 123(R), Share Based Payment. SFAS No. 123(R) addresses accounting for share-based awards, including shares issued under

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employee stock purchase plans, stock options, and stock awards and stock appreciation rights. SFAS 123(R) will require us to expense share-based with compensation cost measured using the fair value of the awards. SFAS 123(R) is effective for us beginning January 1, 2006. We have not yet determined the effect that the adoption of SFAS 123(R) will have on our financial position and results of operations, although compensation costs recognized in operations will increase from historical levels for all fixed awards.
Quantitative and Qualitative Disclosures about Market Risk
We have not used derivative financial instruments for speculation or trading purposes. However, we are exposed to market risk related to changes in interest rates. Our current policy is to maintain an investment portfolio consisting mainly of U.S. money market and government-grade securities, directly or through managed funds, with maturities of one year or less. Our cash is deposited in and invested through highly rated financial institutions in North America. Our short-term investments are subject to interest rate risk and will fall in value if market interest rates increase. If market interest rates were to increase immediately and uniformly by 10% from levels at June 30, 2005, we estimate that the fair value of our investment portfolio would decline by an immaterial amount. While our cash and investment balances will increase upon completion of this offering made by this prospectus, we will have the ability to hold our fixed income investments until maturity, and therefore we would not expect our operating results or cash flows to be affected to any significant degree by the effect of a change in market interest rates on our investments.
Effects of Inflation
Our assets are primarily monetary, consisting of cash, cash equivalents and short-term investments. Because of their liquidity, these assets are not directly affected by inflation. We also believe that we have intangible assets in the value of our technology. In accordance with GAAP, we have not capitalized the value of this intellectual property on our consolidated balance sheet. Due to the nature of this intellectual property, we believe that these intangible assets are not affected by inflation. Because we intend to retain and continue to use our equipment, furniture and fixtures and leasehold improvements, we believe that the incremental inflation related to replacement costs of such items will not materially affect our operations. However, the rate of inflation affects our expenses, such as those for increased personnel and contract services, which could increase our level of expenses and the rate at which we use our resources.

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BUSINESS
Overview
We are a biopharmaceutical company focused on the research, development and commercialization of innovative molecular imaging pharmaceuticals and targeted radiotherapeutics. Our product candidates target markets with significant unmet needs in the areas of cardiology, oncology and neurology. We believe that our product candidates offer significant benefits to patients, healthcare providers and third-party payers by enabling improved diagnosis, treatment and management of disease in a more cost-effective manner.
Our lead product candidate, Zemiva (iodofiltic acid I 123), is a radiolabeled fatty acid analog that we are developing as a molecular imaging pharmaceutical for the diagnosis of insufficient blood flow to the heart, or cardiac ischemia. We believe that Zemiva enables improved diagnosis and management of disease in a more cost-effective and expeditious manner and has significant advantages over the current standard of care in both the emergency department and non-acute settings. Also known as BMIPP, this molecule has been sold in Japan under the name Cardiodine in the non-acute setting for over ten years with no significant safety events reported. Cardiodine has been used in over 500,000 patients and has been the subject of over 200 peer-reviewed articles.
We have recently completed a Phase 2b clinical trial for Zemiva. In this clinical trial, we evaluated the safety and efficacy of Zemiva and initial findings suggest that Zemiva has the ability to detect areas of cardiac ischemia with results generally consistent with the current standard of care. Moreover, Zemiva appeared to have significant predictive value in ruling out cases in which cardiac ischemia was not present. We believe that these findings support our decision to commence a Phase 3 clinical trial for Zemiva in the first half of 2006.
Market Opportunity
Diagnosis of Cardiac Ischemia in the Emergency Department Setting
The initial target market for Zemiva is for the diagnosis of cardiac ischemia in the emergency department setting. In the United States, approximately five to eight million chest pain patients present to emergency departments each year to determine whether their chest pain is caused by cardiac ischemia or myocardial infarction (heart attack). Of these chest pain patients, over three million are admitted to the hospital to achieve diagnosis, of which only approximately 15% are ultimately diagnosed with acute coronary syndrome, or ACS, an umbrella term which refers to cardiac ischemia and myocardial infarction. These life-threatening disorders are a major cause of emergency medical care and hospitalization.
There are many methods used to detect cardiac ischemia and myocardial infarction, all of which have certain limitations. A diagnosis of cardiac ischemia is based on the clinical judgment of the physician, who interprets and weighs findings from the patient’s medical history, clinical exam and diagnostic tests such as an electrocardiogram, cardiac stress test, radionuclide imaging and coronary angiography.
Noninvasive imaging of the heart in the emergency department setting using perfusion, or blood flow, agents is attractive to physicians as a means to diagnose ACS. The significant medical and economic value of imaging chest pain patients in the emergency department setting has been demonstrated in numerous clinical trials. While these findings are important, the widespread use of currently available perfusion agents in the emergency department has practical limitations due to the need to image chest pain patients within two hours after the cessation of chest pain symptoms.
Because of the limitations associated with the current standard of care to detect ACS in the emergency department, diagnosis continues to be a source of uncertainty and error. Moreover, the current standard of care to detect ACS also results in a high rate of “missed” diagnoses. Of the approximately 25% of patients with chest pain who are discharged from the emergency department having not been

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diagnosed with ACS or admitted for further assessment, 1% to 5% actually have ACS. We believe theses statistics highlight a significant opportunity to reduce hospitalizations and expenses to the healthcare system through improved diagnostic techniques.
Unnecessary hospitalizations and “missed” diagnoses are costly in many ways. The current standard of care to detect ACS results in an estimated $3 to $6 billion per year in inpatient expenses that we believe could be avoided with an improved diagnostic. The complications in discharged patients whose ACS is “missed” account for approximately 20% of malpractice awards against emergency department physicians, even though patients with chest pain comprise approximately 6% of a typical emergency physician’s practice. Therefore we believe there is a substantial unmet need for improved diagnosis of ACS, and thus cardiac ischemia, in emergency department settings.
Diagnosis of Cardiac Ischemia in the Non-Acute Setting
In 2002 over nine million nuclear stress tests were performed in the United States for the purpose of diagnosis, prognosis and risk stratification in patients who may be at risk for cardiac ischemia. Stress tests are performed using perfusion agents such as Cardiolite, Myoview and generic thallium. We estimate that the world-wide sales of these agents in the non-acute setting were approximately $1 billion in 2004.
While myocardial perfusion stress tests are generally effective in terms of diagnosis, the manner in which they are conducted is inconvenient, time consuming and expensive because of the inherent limitations of current imaging agents. As a result, we believe there is a substantial unmet need for an improved imaging agent that will shorten the time required to perform stress tests, which typically amounts to 3 to 4 hours and up to 24 hours in certain cases. By reducing this period, we believe that patient convenience and throughput will be increased and overall costs will be reduced.
Our Lead Product Candidate: Zemiva
Zemiva is a radiolabeled fatty acid analog that is also known as BMIPP. This molecule has been sold in Japan under the name Cardiodine in the non-acute setting for over ten years and, to our knowledge, no significant safety events have been reported. Cardiodine has been used in over 500,000 patients and has been the subject of over 200 peer-reviewed articles.
We believe that Zemiva offers significant advantages over the current standard of care with respect to the diagnosis of cardiac ischemia in both the emergency department and non-acute setting:
  •  Emergency Department. We believe that our clinical data show that Zemiva enables the detection of cardiac ischemia up to 30 hours following an ischemic episode. Currently available imaging agents are only effective when used during ongoing symptoms or within two hours after cessation of symptoms. After this period, a time consuming and expensive series of diagnostic tests is required, including a stress test after the patient has been stabilized. As a result of Zemiva’s extended “imaging window,” we believe that Zemiva will offer more timely, convenient and cost effective diagnosis when compared with the current standard of care.
 
  •  Non-Acute Setting. Utilizing Zemiva, a stress test will require approximately one hour. With currently available imaging agents such as Cardiolite and Myoview, stress tests typically require 3 to 4 hours, and may require up to 24 hours in certain cases. By reducing the time required for a stress test, we believe that Zemiva will offer increased patient throughput and convenience at a lower overall cost to the healthcare system.
Mechanism of Action
Under normal conditions, 70% to 80% of the energy for the heart is produced by the metabolism of fatty acids. However, in ischemic conditions, fatty acid metabolism is drastically reduced and the

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metabolism of carbohydrates becomes the heart’s primary source of energy. More importantly, this shift in metabolic activity from fatty acids to carbohydrates persists for some time and results in a phenomenon described as “ischemic memory” that can be evidenced in a Zemiva image of reduced fatty acid utilization.
Zemiva is a methyl branched-chained fatty acid analog, and is trapped in healthy heart cells that have appropriate blood supply. In contrast, retention of Zemiva is reduced in ischemic heart cells. Because of its high heart uptake and long retention in healthy heart cells, Zemiva provides high quality images of the heart. Uptake of Zemiva in the heart most likely reflects normal fatty acid metabolism. In the setting of cardiac ischemia, reduction in fatty acid metabolism is mirrored by decreased cardiac uptake of Zemiva.
In the clinical setting, the finding of persistent and prolonged disturbances in fatty acid uptake, long after resolution of ischemic symptoms, may provide a direct imprint as to the underlying cause of the patient’s symptoms. In patients who present to the emergency department with acute chest pain and no myocardial infarction, sustained alterations of myocardial fatty acid metabolism as assessed by Zemiva have been described in the absence of abnormalities in regional cardiac blood flow. The potential importance of this observation is that Zemiva imaging extends the “imaging window” for identifying cardiac ischemia long after cessation of chest pain and restoration of resting myocardial blood flow.
Use of BMIPP in Japan
The underlying molecule for Zemiva, BMIPP, has been approved for use in Japan for over 10 years. BMIPP is marketed there as Cardiodine by Nihon Medi-Physics, which is a joint venture between Sumitomo Chemical Co., Ltd. and a subsidiary of General Electric Company (the maker of Myoview). Cardiodine has an established safety profile and has demonstrated clinical utility through use in more than 500,000 patients in Japan. It has been the subject of over 200 peer-reviewed articles. From this clinical experience in Japan, no serious adverse events or safety concerns related to BMIPP have been reported.
Cardiodine is used in patients with angina, myocardial infarct and cardiomyopathy in the non-acute setting. To our knowledge, Nihon Medi-Physics is not pursuing development in the emergency department market and has not aggressively marketed Cardiodine against existing perfusion agents, such as General Electric Company’s Myoview, and generic thallium. In addition to Cardiodine’s extensive experience in the stress test segment, several peer-reviewed articles have described the utility of BMIPP in Japan for imaging congestive heart failure, left ventricular dysfunction, myocardial viability and acute myocardial infarction.
To our knowledge, Nihon Medi-Physics does not have BMIPP patent rights in or outside of Japan. We do, however, have an agreement with Nihon Medi-Physics that allows us to read and reference data from their Japanese regulatory filings and Phase 4 study in Japan in connection with our submissions to the FDA. For Nihon Medi-Physics to enter the U.S. marketplace for BMIPP before the expiration of our expected market exclusivity it would need to initiate and complete a new clinical and regulatory program and secure manufacturing capabilities in North America. We do not believe that Nihon Medi-Physics has initiated a clinical program in support of an NDA, in the United States for this product.
Completed Clinical Studies
We have completed three clinical studies, including two multi-center Phase 2 studies and a Phase 1 study at Massachusetts General Hospital. Data from these studies have been presented at leading scientific forums, including the American Society of Nuclear Cardiology and the American Heart Association annual scientific meetings. Results from our Phase 2a trial were published recently in the peer-reviewed journal Circulation and cited at the recent American Society of Nuclear Cardiology meeting. Taken in the aggregate, we believe that our clinical results provide preliminary indications of

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the safety and efficacy of Zemiva. More detailed information with respect to these studies is as follows:
  •  Multi-Center Phase 2b Clinical Trial. In March 2005, we completed enrollment of 105 patients in our multi-center Phase 2b clinical trial of Zemiva. This trial was designed to evaluate the safety and feasibility of Zemiva for the detection of cardiac ischemia in patients with suspected ACS whose symptoms occurred within 30 hours prior to Zemiva injection. The objectives of the study were to evaluate: 1) the performance characteristics (accuracy, sensitivity, specificity, positive predictive value and negative predictive value) of Zemiva imaging for detection/exclusion of ACS; and 2) the safety of a single injection of Zemiva in patients suspected of ACS. The study was designed as an open-label Phase 2 study that recruited high-likelihood and intermediate- to low-likelihood ACS patients. Patients were imaged with Zemiva for the presence or absence of altered fatty acid metabolism due to cardiac ischemia. Preliminary findings of this study suggest that Zemiva demonstrates the ability to detect areas of cardiac ischemia with results generally consistent with traditional diagnostic techniques, including those requiring substantially greater time to complete. Preliminary analysis also suggests that there is a high negative predictive value when Zemiva is administered to these patients at rest. We expect the findings of this study to support the decision to continue evaluation of the safety and efficacy of Zemiva in Phase 3 clinical research.
 
  •  Multi-Center Phase 2a Clinical Trial. We enrolled 32 patients in our multi-center Phase 2a clinical trial of Zemiva. This trial evaluated the safety and feasibility of Zemiva for the detection of ischemia subsequent to a documented ischemic event. The multi-center Phase 2a study was designed to characterize the cardiac uptake of Zemiva in the hearts of patients who have experienced an ischemic event (induced during the exercise portion of clinically indicated stress/rest cardiac perfusion imaging test) within 30 hours prior to study drug administration. The results of the Zemiva cardiac images were also compared with the results of the cardiac perfusion study. We believe that the data demonstrate that Zemiva administered to resting patients with ischemia safely detects an ischemic event up to 30 hours after the event occurred, without the use of a stress test. Currently marketed perfusion agents must be used within two hours as recommended by the American Society of Nuclear Cardiology’s position paper on diagnosing suspected ischemia in the emergency department setting.
 
  •  Phase 1 Clinical Trial. We enrolled six volunteers in our single-center Phase 1 clinical trial of Zemiva. This trial evaluated the safety, radiation dosimetry, organ distribution and effects of fasting on cardiac uptake. Each volunteer was studied twice: once while fasting and once after a predetermined meal. Zemiva demonstrated safety, high quality cardiac images and a five- to six-fold reduction in radiation dose compared to current perfusion agents.
Clinical Development Plan
Our goal is to achieve regulatory approval for Zemiva in the United States in the most expeditious manner possible. We have conducted two multi-center Phase 2 trials and a Phase 1 trial. We believe that the data from these trials as well as the safety and efficacy data from the use of BMIPP in Japan strongly support our decision to advance Zemiva into Phase 3 development.
As part of our U.S. regulatory strategy for Zemiva, we expect to conduct additional clinical trials as follows:
  •  Phase 2 Normals Database Clinical Trial. We expect to begin a Phase 2 clinical trial to develop our own reference database of normal images for myocardial SPECT imaging, or a Normals database, in the first half of 2006. A Normals database is a valuable tool for the physician interpreting the cardiac image, regardless of whether the study is read by a nuclear

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  cardiologist, nuclear medicine physician or nuclear radiologist. Such a database enables the interpreting physician to compare a patient’s cardiac image against that of a “normal” image as defined by computer-compiled data. Consistent with this standard practice, we intend to conduct a Phase 2 clinical trial to develop our own Normals database that will be used as part of our Phase 3 clinical trial and in the commercialization of Zemiva, if approved by the FDA or comparable regulatory bodies outside the United States. This trial is expected to include approximately 120 patients.
 
  •  Phase 3 Clinical Trial. We are in the process of designing our Phase 3 clinical trial protocol for Zemiva and anticipate conducting a multi-center study with approximately 450 patients at 20 centers in North America, with a possible Phase 4 follow-up requirement. We intend to commence this clinical trial in the first half of 2006. The final protocol design, including the number of patients and trials, will depend upon the final results of our Phase 2 trial data and input from the FDA.

We believe that the data from these anticipated clinical trials, along with the data from our previous clinical trials as well as that derived from the use of BMIPP in Japan, will provide a basis for us to file for regulatory approval in the United States.
Other Product Candidates
In addition to Zemiva, we are developing a portfolio of product candidates for cardiovascular molecular imaging as well as for oncological molecular imaging and targeted radiotherapy using our proprietary technologies. Applied independently and in combination, these technologies enable the development of novel molecular imaging pharmaceuticals and targeted radiotherapeutics using both

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small molecule and protein-based agents. The following table summarizes our product candidates in development:
(FLOW CHART)
Ultratrace MIBG
We are developing new molecular imaging pharmaceuticals and radiotherapeutics to detect, treat and manage cancer. Ultratrace MIBG, or MIP-120T (I 131-metaiodobenzyl-guanidine, or MIBG) is our product candidate for the treatment of neuroendocrine tumors, such as neuroblastoma, pheochromocytoma and carcinoid. We plan to begin a U.S. Phase 1 clinical trial with Ultratrace MIBG involving 6 to 10 volunteers in the first half of 2006.
MIBG is an analog of the biogenic amine norepinephrine, which was first described by researchers at the University of Michigan. It has been used in its radiolabeled forms (usually I-131 or I-123) since the early 1980s at centers that specialize in the treatment of neuroblastoma and at centers that evaluate patients with neuroendocrine tumors. Iodine has many useful radioactive isotopes for use in medicine. I-123 is used primarily for imaging and I-131 is used primarily for therapeutic applications.
I-123 MIBG is marketed in Europe and Japan for imaging, but is not an FDA-approved product in the United States. While I-131 MIBG is commercially available in the United States for diagnostic purposes, it is considered a poor isotope for diagnostic imaging since it results in a high radiation dose to the patient and inferior image quality compared with I-123.
The mechanism by which MIBG molecules accumulate in tumors is very selective and controlled by the protein called the norepinephrine transporter, or NET, which is expressed in limited amounts on the cell surface. Like the hormone norepinephrine, MIBG is concentrated by NET and it is stored within specific types of neuronal tissue and tumor cells. This uptake and prolonged retention of MIBG within tumor cells constitutes a superior targeting mechanism. However, the number of MIBG molecules taken up by a tumor cell is limited. Thus, if the goal is to maximize the accumulation of radioactive molecules of MIBG in tumors so that tumors can be clearly visualized or effectively treated by the radioactivity, the amount of non-radioactive MIBG molecules present in the drug formulation must be minimized.

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Through the use of our Ultratrace technology, we have created a platform to enable the production of ultrapure radioactive MIBG. This technology greatly reduces the amount of non-radioactive MIBG molecules, or cold contaminants, by several orders of magnitude and thereby enhances tumor accumulation. The anticipated result is improved tumor visualization and therapeutic efficacy as well as improved patient safety by reducing chemical toxicity. Our collaborators from the University of Glasgow demonstrated a superior and sustained arrest of tumor growth in animal studies using high-specific activity MIBG that is enabled by our Ultratrace platform technology. We believe that these early but promising results suggest a potentially significant opportunity for us to apply our Ultratrace platform technology to develop targeted radiotherapeutics such as Ultratrace MIBG for certain kinds of cancer. We commenced preclinical studies for Ultratrace MIBG in the second half of 2005, and intend to initiate a Phase 1 clinical trial in the first half of 2006.
Cardiovascular Discovery Product Candidates
We are conducting discovery studies on second-generation fatty acid compounds that are based on enhanced structural features of Zemiva, as well as on third-generation fatty acid analogs that will focus on a new class of proprietary radiolabeled fatty acid analogs. We believe that these compounds may provide us with a robust, patented and differentiated extension to the Zemiva franchise. In conjunction with scientists at the University of Maryland Medical Center, we have engaged in NIH-sponsored development of cardiovascular compounds to target the angiotensin converting enzyme, or ACE, as markers for the assessment of heart failure patients. Such compounds would be novel, in that they would enable the evaluation of ACE in human hearts with chronic ischemia and heart failure using external imaging.
Oncology Discovery Product Candidates
Prostate cancer is the most commonly diagnosed cancer among men in the United States, with approximately 230,000 men newly diagnosed each year. We are engaged in discovery studies of radiopharmaceuticals to bind to prostate specific membrane antigen, or PSMA, that would allow us to image the tumor and monitor response therapy. This technology employs a novel class of synthetic dipeptides used in conjunction with our SAAC technology. We are also collaborating with investigators at the University of California at San Diego on the design of peptide-modified SAAC-containing polymers to target the integrin receptors that are found on newly growing, or angiogenic, blood vessels within tumors. We believe that our approach should lead to new targeting molecules that would allow us to image angiogenesis in a variety of tumors and to monitor response to anti-angiogenic tumor therapy.
Neurology Discovery Product Candidate
Our neurology preclinical discovery candidate, MIP-170D, represents a class of high-affinity radiolabeled dopamine transporter ligand that is being developed to aid in the diagnosis of disorders that involve dopamine-rich regions of the brain. We believe that MIP-170D has the potential to aid in the objective diagnosis of Parkinson’s disease and Attention Deficit Hyperactivity Disorder, or ADHD.
Our Proprietary Technology Platforms
Our core proprietary technologies drive development of our current portfolio and should enable the research and development of future molecular imaging pharmaceuticals and targeted radiotherapeutic candidates. Our core proprietary technologies, applied independently and together, include:
  •  Ultratrace Technology. Our Ultratrace Technology is a proprietary solid-phase radiolabeling technology that enables the development of ultrapure radiopharmaceuticals, such as Ultratrace MIBG, that display greater specificity and potency by eliminating unwanted non-radioactive targeting molecules. Current radiolabeling technologies are not efficient in linking radioisotopes to the active targeting molecule. The resulting products are

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  mixtures that contain both radiolabeled and unlabeled active targeting molecules, which are unwanted cold contaminants. Providing no known benefits, cold contaminants bind to receptor sites of target cancer molecules, precluding radiolabeled molecules from being able to bind to the target sites and deliver their radioactive therapy. Ultratrace creates ultrapure product candidates with a substantially greater proportion of radiolabeled targeting molecules. Our strategy is to validate the Ultratrace platform with Ultratrace MIBG and to explore broader applications in cancer therapy and molecular imaging.
 
  •  SAAC Technology. The ability to reliably and robustly incorporate medically useful radioactive metals into biologically relevant targeting molecules is critical to the design of successful radiopharmaceuticals for molecular imaging and targeted radiotherapy. Single Amino Acid Chelate, or SAAC, is our unique metal binding chemistry platform technology. It represents a new family of compounds with superior metal binding properties for leading radionuclides used for imaging and therapy, namely technetium-99m and rhenium-186 and rhenium-188. This technology incorporates a metal binding, or chelating, group that can rapidly and efficiently bind to technetium or rhenium for diagnostic and therapeutic uses with an amino acid portion that allows it to be incorporated into any peptide sequence through the use of conventional peptide chemistry. SAAC opens up the possibility of creating many new compounds that can be screened for molecular targeting of a variety of disease states.
 
  •  SAACQ Technology. Two widely employed techniques for visualizing specific biological processes are fluorescence microscopy and radioisotope imaging. The new fluorescence-based technology called SAACQ enables the visualization of radiopharmaceuticals interacting with cellular structures. This advance promises to accelerate the development of molecular imaging pharmaceuticals and targeted radiotherapeutics by allowing live cell activity to be viewed by fluorescent microscopy. SAACQ technology may enable our scientists to bridge the gap between research in isolated cells and research in live subjects by increasing the understanding of cellular behavior, potentially resulting in the development of a new generation of molecular imaging pharmaceuticals and targeted radiotherapeutics.
 
  •  Nanotrace Discovery. Our Nanotrace Discovery targeting platform technology allows for the rapid creation and screening of new leads for molecular targeting of disease. We believe that we can utilize this technology to create libraries of radiolabeled compounds in a relatively short period of time. These compounds can be more efficiently and effectively screened in cell culture and in animal models than through current screening methods. Nanotrace Discovery appears to be applicable to major disease categories such as cardiovascular disease, oncology and neurology.

Our Business Strategy
We intend to become a leader in the research, development and commercialization of innovative molecular imaging pharmaceuticals and targeted radiotherapeutics that improve patient diagnosis and care. Our strategy is to build our product portfolio in each of these areas through our internal research, using our proprietary technologies and by acquiring or in-licensing complementary products and technologies. We plan to take the following steps to implement our strategy:
  •  Seek regulatory approval of Zemiva for the diagnosis of cardiac ischemia in the emergency department setting. Our primary focus is to seek regulatory approval for Zemiva in the United States. We plan to begin a U.S. multi-center Phase 3 clinical trial with Zemiva in the first half of 2006 as well as a Phase 2 clinical trial to develop our own Normals database that will be used as part of our Phase 3 clinical trial and in the commercialization of Zemiva, if approved by the FDA and other regulatory bodies.

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  •  Develop our own specialty sales and marketing team to market Zemiva in the United States and establish strategic collaborations to market Zemiva abroad. We intend to develop our own specialty sales and marketing team to market Zemiva in the United States following regulatory approval. We plan to grow our sales force from approximately 30 salespeople at product launch to 100 individuals in order to broaden our coverage to smaller hospitals. We expect to seek one or more strategic partners to market Zemiva outside the United States.
 
  •  Expand the indications for which Zemiva may be used, beginning with indications in the non-acute setting. We believe that Zemiva may offer significant benefits over the current standard of care in the non-acute setting for the diagnosis of coronary disease. Our plan is to initiate a U.S. Phase 2 clinical trials for Zemiva in non-acute settings in the second half of 2006. Following Phase 2 and 3 clinical trials in the non-acute setting, we plan to file a supplemental new drug application, or sNDA, to include the use of Zemiva in the non-acute setting as an additional approved indication in the Zemiva NDA. We are also exploring the use of Zemiva in other indications such as the detection and monitoring of heart failure, cardiomyopathy and diabetes-related cardiac disease.
 
  •  Advance Ultratrace MIBG into clinical trials for the detection and treatment of neuroendocrine tumors. We believe that Ultratrace MIBG may offer increased efficacy and reduced side effects in the treatment of patients with certain difficult-to-treat neuroendocrine tumors. We plan to begin clinical trials in adult neuroendocrine tumors for Ultratrace MIBG in the first half of 2006.
 
  •  Advance the development of our preclinical product candidates. We have several early stage development programs which will expand our activity in molecular cardiology, oncology and neurology. These programs focus on novel approaches in target selection and the use of our technology platforms to provide innovative new product candidates.
 
  •  Expand our product pipeline through our proprietary platform technologies, acquisitions and strategic licensing arrangements. We intend to leverage our proprietary platform technologies to grow our portfolio of product candidates for cardiology, oncology, neurology and other areas of unmet medical need. In addition, we intend to continue to in-license and acquire products, product candidates and technologies that are consistent with our research and development and business focus and strategies.
Sales and Marketing
We intend to market Zemiva through our own specialty sales and marketing team. Considering the concentrated nature of our initial target markets, we believe that a dedicated sales force of approximately 30 individuals upon commercial launch of Zemiva will be sufficient to support the market for Zemiva in the first year. Over time we plan to grow our sales force for Zemiva to approximately 100 individuals. To support medical education efforts for the product, we plan to hire a group of 5 to 10 medical liaisons with emergency department or nuclear medicine expertise to provide technical training and education.
Our initial marketing focus for Zemiva will be on large hospitals with over 200 beds that have nuclear medicine capabilities available 24 hours a day. There are approximately 1,800 hospitals in the United States with emergency departments and over 200 beds. Of these, 80% have nuclear medicine available 24 hours a day. Thus, our target hospital focus will be on approximately 1,400 hospitals that tend to be clustered in concentrated areas of large populations. Approximately 76% of emergency department visits occur at hospitals with over 200 beds.

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Manufacturing
Zemiva is currently manufactured for our preclinical and clinical trials at a manufacturing facility owned by MDS Nordion located in Vancouver, Canada which is to our knowledge compliant with current Good Manufacturing Practices or cGMP. We believe that the MDS Nordion facility is sufficient to produce Zemiva required for use through our clinical trials. We do not, however, have any experience in commercial-scale manufacturing. Therefore, if we receive FDA approval of Zemiva, we may need to rely on contractual relationships with third-party manufacturers for commercial scale production.
We anticipate that the manufacture of the other products in our development pipeline will be outsourced to experienced cGMP-compliant medical manufacturing companies.
Strategic Agreements
Manufacturing Agreement with MDS Nordion
We have entered into a development and manufacturing agreement with MDS Nordion to produce Zemiva for our clinical trial studies. Zemiva is labeled with MDS Nordion’s high-purity I-123 and is manufactured in a new cyclotron facility. MDS Nordion is a respected manufacturer of I-123 production systems and the major supplier of I-123 in North America. The agreement obligates us to make certain milestone payments as well as payments for clinical product to be used in the Phase 3 clinical trial for Zemiva. The agreement currently expires on December 31, 2006 unless extended by mutual agreement of the parties.
License Agreements with Georgetown University
We have entered into two license agreements with Georgetown University. Pursuant to the first agreement, we have licensed on an exclusive basis, in the field of imaging applications, the use of ligands for metabotropic glutamate receptors and inhibitors of NAALADase. In exchange for these exclusive rights, we are obligated to pay certain royalties and up to $900,000 in total of milestone payments upon the attainment of certain approvals in the regulatory process. Such milestone payments may be reduced for subsequent new drug applications submitted for new uses of the same compound and are creditable against future royalty payments. Pursuant to the second license, we have exclusive rights to analogs of cocaine, for the therapeutic and diagnostic uses of these compounds in substance abuse, obesity, depression, Parkinson’s disease and related neuropsychological conditions and diseases. In exchange for these exclusive rights, we are obligated to pay certain royalties and up to $800,000 in total of milestone payments upon the attainment of certain approvals in the regulatory process. Such milestone payments may be reduced for subsequent new drug applications submitted for new uses of the same compound and are creditable against future royalty payments.
License Agreement with the University of Western Ontario
We have entered into a license agreement with the University of Western Ontario pursuant to which we license the patent rights to certain polymer precursors used in the creation of the BMIPP molecule on an exclusive basis. While the university retains the ownership of the patent rights, we shall own any improvements to the technology made by us or on our behalf. In exchange for these exclusive rights, we are obligated to pay to the University of Western Ontario certain royalty and milestone payments. The license terminates with respect to each patent on the earlier of July 30, 2023 or the date the applicable patent expires, and the period of exclusivity terminates upon the expiration of each patent in each country.
License Agreement with Nihon Medi-Physics Co. Ltd.
We have entered into a license agreement with Nihon Medi-Physics Co. Ltd., or Nihon, for access to its non-patented, confidential clinical information related to its product, Cardiodine. As part of this

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agreement, we pay Nihon certain royalties on net sales of our Zemiva product for its first indication, if the use of Nihon’s clinical data enables us to omit or limit any of the clinical trial phases in the United States regulatory approval process for Zemiva. While we have used the data from Nihon in a supportive manner, we have not been able to omit or limit the clinical trials in support of our Zemiva NDA and, therefore, do not expect to pay any royalties to Nihon upon sales of Zemiva.
Competition
We will compete for market share against large pharmaceutical and biotechnology companies, smaller companies that are collaborating with larger pharmaceutical companies, new companies, academic institutions, government agencies and other public and private research organizations. Many of these competitors, either alone or together with their partners, may develop new product candidates that will compete with ours, and these competitors may, and in certain cases do, operate larger research and development programs or have substantially greater financial resources than we do.
If approved, Zemiva’s competition in the emergency department setting will be the current standard of care in the assessment of chest pain patients who present to emergency departments. This standard involves several diagnostic products and procedures, in some cases involving the use of perfusion imaging agents, which in the aggregate may require several hours or days of hospitalization to reach an ultimate diagnosis.
Perfusion imaging agents such as Cardiolite (from Bristol-Myers Squibb Imaging), Myoview (from Amersham, a subsidiary of General Electric Company) and thallium, are unable to reliably detect cardiac ischemia more than two hours after the cessation of chest pains, thereby making them of limited value in the emergency department setting. Many patients who present with chest pain in the emergency department are beyond the perfusion agents’ two-hour window of active symptoms when they arrive or their symptoms subside while waiting in the emergency department. Additionally, as their hearts may be unstable, stress testing with these agents is contraindicated in patients with suspected ACS in the emergency department setting. Sales of perfusion agents in the acute setting account for approximately 2% of the overall sales for these agents.
Perfusion agents would be, however, Zemiva’s main competition in the non-acute market if regulatory approval is obtained. We estimate that worldwide sales of Cardiolite, Myoview and thallium were approximately $1 billion in 2004. Currently, these perfusion agents are used almost exclusively in non-acute settings in connection with stress testing where the patient’s stress is induced (either by exercise or a pharmacological stress agent) as they must be used within two hours after the cessation of chest pain.
Patents and Proprietary Rights
Our success depends in part on our ability to obtain and maintain a competitive position in the marketplace. This includes obtaining proprietary protection for our product candidates, technology, and know-how; preventing others from infringing our proprietary rights; and operating without infringing the proprietary rights of others. Our policy is to seek to protect our proprietary position by, among other methods, applying for and obtaining U.S. and foreign patents relating to our proprietary technologies, inventions, and improvements that are important to our business. This includes obtaining patent term extensions or restorations when possible. In addition, we rely on trade secrets, know-how, continuing technological innovation and in-licensing opportunities to develop and maintain our proprietary positions. Furthermore, we intend to build brand identity in our company, our technologies and our product candidates, and for this purpose have applied for certain trademarks, as described below.
As of September 30, 2005, we have seven issued patents granted to us by the United States Patent and Trademark Office and four issued foreign patents, including counterparts to U.S. filings. We have nine pending U.S. patent applications, two pending filings under the Patent Cooperation Treaty that are not

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yet nationalized, and 34 nationalized and pending foreign patent applications. Additionally, we have obtained licenses from third parties for the rights to use certain proprietary technologies and compounds. Our in-licensed technology provides us certain rights to three issued U.S. patents, three issued foreign patents, including counterparts to U.S. filings, one pending U.S. patent application, and five nationalized and pending foreign patent applications. For a discussion of these agreements, see “Other Agreements.” While we believe our patents and patent applications may be important for certain aspects of our business, such as those related to specific product candidates such as BMIPP derivatives, which patents and applications expire between 2016 and 2023, we believe that our success also depends upon innovation, technical expertise, and responsiveness to the medical needs of an aging patient population. While our patented technology may delay or deter a competitor in offering a competing product, we believe our technical capability should also allow us to obtain limited market exclusivity in the United States under the Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Act, and abroad through similar legislation.
The original patent protecting the composition of BMIPP expired in 2003. However, we believe that Zemiva, or BMIPP, is a new chemical entity in the United States and Europe and, therefore, should be eligible for market exclusivity under the FDCA as amended by the Hatch-Waxman Act. We are also pursuing three additional patent families (in the United States and internationally) to provide up to 18 years of new patent-based exclusivity for certain aspects of BMIPP and BMIPP-derivative compositions.
The Hatch-Waxman Act provides a five-year period of non-patent marketing exclusivity to the first applicant to gain approval of an NDA for a new chemical entity, meaning that the FDA has not previously approved any other new drug containing the same active agent. During the exclusivity period, the FDA may not accept for review an abbreviated new drug application, or ANDA, or a 505(b)(2) NDA submitted by another company for another version of such drug, where the applicant does not own or have a legal right of reference to all the data required for approval. Protection under the Hatch-Waxman Act will not prevent the filing or approval of another full NDA, but the applicant would be required to conduct its own adequate and well-controlled clinical trials to demonstrate safety and effectiveness. The Hatch-Waxman Act also provides three years of marketing exclusivity for an NDA, 505(b)(2) NDA or supplements to existing NDAs if new clinical investigations are essential to the approval of the applications, for example, for new indications, dosages, or strengths of an existing drug. This three-year exclusivity covers only the conditions associated with the new clinical investigations and does not prohibit the FDA from approving ANDAs for drugs containing the original active agent.
The Hatch-Waxman Act also permits a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years. The patent term restoration period is generally one-half the time between the effective date of an investigational new drug exemption, or IND, and the submission date of an NDA, plus the time between the submission date of an NDA and the approval of that application. Only one patent applicable to an approved drug is eligible for the extension and it must be applied for prior to expiration of the patent. The United States Patent and Trademark Office, in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we may consider applying for restorations of patent term for some of our currently owned or licensed patents to add patent life beyond the current expiration date, depending on the expected length of clinical trials and other factors involved in the filing of the relevant new drug application.
The patent positions of companies like ours are generally uncertain and involve complex legal and factual questions. Our ability to maintain and solidify our proprietary position for our technology will depend on our success in obtaining effective claims and enforcing those claims once granted. We do not know with certainty whether any of our patent applications or those patent applications that we license will result in the issuance of any new patents. Our issued patents and those that may issue in

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the future, or those licensed to us, may be challenged, invalidated, or circumvented, which could limit our ability to stop competitors from marketing related products, or could affect the length of term of patent protection that we may have for our products. In addition, the rights granted under any issued patents may not provide us with sufficient proprietary protection or competitive advantages against competitors with similar technology. Furthermore, our competitors may independently develop similar technologies or duplicate any technology developed by us and, to the extent they seek to protect these technologies through patents and such technologies are determined to contain valid and enforceable claims, they could achieve a legal determination that our products or technologies are infringing these third-party patents. Because of the extensive time required for development, testing and regulatory review of a potential product, it is possible that before any of our products can be commercialized, any related patent may expire, or that such patent may remain in force for only a short period following commercialization of a product candidate, thereby reducing any advantage of the patent with respect to that product candidate. While patent term restoration is available under the Hatch-Waxman Act and similar laws, we cannot predict whether such patent term restoration will be granted to us as to any particular patent covering such product candidate.
We rely in some circumstances on trade secrets to protect our technology, particularly with respect to certain aspects of our Zemiva manufacturing process. Trade secrets, however, can be difficult to protect. We seek to protect our proprietary technology and processes, in part, by confidentiality agreements with our employees, consultants, scientific advisors, contract manufacturers and other entities with whom we do business. However, these agreements may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our employees, consultants or contractors use intellectual property owned by others in their work for us, disputes may arise as to the proprietary rights or resulting know-how generated in related inventions.
We currently use Molecular Insight tm and the Molecular Insight logo as trademarks in the United States and other countries. We have sought U.S. trademark registration for Molecular Insight tm and plan to seek similar protection for this mark outside the United States. We have also filed intent to use registrations with the United States Patent and Trademark Office, for the trademarks Ultratrace tm , Zemiva tm and Velepin tm and plan to seek similar protection for these marks outside the United States. We use SAAC tm , SAACQ tm and Nanotrace tm Discovery as trademarks in the United States and other countries, and are exploring the applicability of U.S. and foreign registration for these trademarks. We cannot guarantee any of these marks will be approved in the United States or in foreign jurisdictions. In addition, we have obtained rights to the following Internet domain names: www.molecularinsight.com, www.zemiva.com, www.zemiva.org, www.zemiva.net, www.velepin.com, www.velepin.org, www.velepin.net, www.ultratrace.org, and www.ultratrace.net.
Government Regulation
Government authorities in the United States and foreign countries extensively regulate, among other things, the research, development, testing, manufacture, labeling, promotion, advertising, distribution, sampling, marketing and import and export of pharmaceutical products. Our molecular imaging pharmaceuticals and targeted radiotherapeutics in the United States will be subject to FDA regulation as drugs under the FDCA, and require FDA approval prior to commercial distribution. The process of obtaining governmental approvals and complying with ongoing regulatory requirements requires the expenditure of substantial time and financial resources. In addition, statutes, rules, regulations and policies may change and new legislation or regulations may be issued that could delay such approvals. If we fail to comply with applicable regulatory requirements at any time during the product development process, approval process, or after approval, we may become subject to administrative or judicial sanctions. These sanctions could include the FDA’s refusal to approve pending applications, withdrawals of approvals, clinical holds, warning letters, product recalls, product seizures, total or

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partial suspension of our operations, injunctions, fines, civil penalties or criminal prosecution. Any agency enforcement action could have a material adverse effect on us.
The U.S. regulatory scheme for the development and commercialization of new pharmaceutical products can be divided into three distinct phases: an investigational phase including both preclinical and clinical investigations leading up to the submission of an NDA, a period of FDA review culminating in the approval or refusal to approve the NDA, and the post-marketing period. Each of these phases is described below.
Preclinical Phase
The preclinical phase involves the characterization, product formulation and animal testing necessary to prepare an IND for submission to the FDA. The IND must be reviewed and authorized by the FDA before the drug can be tested in humans. Once a new pharmaceutical agent has been identified and selected for further development, preclinical testing is conducted to confirm pharmacological activity, to generate safety data, to evaluate prototype dosage forms for appropriate release and activity characteristics, and to confirm the integrity and quality of the material to be used in clinical trials. A bulk supply of the active ingredient to support the necessary dosing in initial clinical trials must be secured. Data from the preclinical investigations and detailed information on proposed clinical investigations are compiled in an IND submission and submitted for FDA before human clinical trials may begin. If the FDA does not formally communicate an objection to the IND within 30 days, the specific clinical trials outlined in the IND may go forward.
Clinical Phase
The clinical phase of drug development follows a successful IND submission and involves the activities necessary to demonstrate the safety, tolerability, efficacy, and dosage of the substance in humans, as well as the ability to produce the substance in accordance with the FDA’s cGMP requirements. Data from these activities are compiled in an NDA requesting approval to market the drug for a given use, or indication. Clinical trials must be conducted under the supervision of qualified investigators in accordance with good clinical practice, and according to IND-approved protocols detailing, among other things, the study objectives and the parameters, or endpoints, to be used in assessing safety and efficacy. Each trial must be reviewed, approved and conducted under the auspices of an independent Institutional Review Board, or IRB, and each trial, with limited exceptions, must include all subjects’ informed consent. The clinical evaluation phase typically involves the following sequential process:
Phase 1 clinical trials are conducted in a limited number of healthy subjects to determine the drug’s safety, tolerability, and biological performance. The total number of subjects in Phase 1 clinical trials varies, but is generally in the range of 20 to 80 people (or less in some cases, such as drugs with significant human experience).
Phase 2 clinical trials involve administering the drug to subjects suffering from the target disease or condition to evaluate the drug’s potential efficacy and appropriate dose. The number of subjects in Phase 2 trials is typically several hundred subjects or less.
Phase 3 clinical trials are performed after preliminary evidence suggesting effectiveness has been obtained and safety, tolerability, and appropriate dosing have been established. Phase 3 clinical trials are intended to gather additional data needed to evaluate the drug’s overall benefit-risk relationship of the drug and to provide adequate instructions for its use. Phase 3 trials usually include from several hundred to several thousand subjects.
Throughout the clinical testing phase, samples of the product made in different batches are tested for stability to establish shelf life constraints. In addition, increasingly large-scale production protocols and written standard operating procedures must be developed for each aspect of commercial manufacture and testing.

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The clinical trial phase is both costly and time-consuming, and may not be completed successfully within any specified time period, if at all. The FDA closely monitors the progress of each of the three phases of clinical trials that are conducted under an IND and may, at its discretion, reevaluate, alter, suspend, or terminate the testing at any time for various reasons, including a finding that the subjects or patients are being exposed to an unacceptable health risk. The FDA can also request additional clinical testing as a condition to product approval. Additionally, new government requirements may be established that could delay or prevent regulatory approval of our products under development. Furthermore, institutional review boards, which are independent entities constituted to protect human subjects in the institutions in which clinical trials are being conducted, have the authority to suspend clinical trials in their respective institutions at any time for a variety of reasons, including safety issues.
New Drug Application and Review
After the successful completion of Phase 3 clinical trials, the sponsor of the new drug submits an NDA to the FDA requesting approval to market the product for one or more indications. An NDA is a comprehensive, multi-volume application that includes, among other things, the results of all preclinical and clinical studies, information about the drug’s composition, and the sponsor’s plans for producing, packaging, and labeling the drug. In most cases, the NDA must be accompanied by a substantial user fee. FDA has 60 days after submission to review the completeness and organization of the application, and may refuse to accept it for continued review, or refuse to file, if the application is found deficient. After filing, the FDA reviews an NDA to determine, among other things, whether a product is safe and effective for its intended use. Drugs that successfully complete NDA review may be marketed in the United States, subject to all conditions imposed by the FDA.
Prior to granting approval, the FDA generally conducts an inspection of the facilities, including outsourced facilities that will be involved in the manufacture, production, packaging, testing and control of the drug product for cGMP compliance. The FDA will not approve the application unless cGMP compliance is satisfactory. If the FDA determines that the marketing application, manufacturing process, or manufacturing facilities are not acceptable, it will outline the deficiencies in the submission and will often request additional testing or information. Notwithstanding the submission of any requested additional information, the FDA ultimately may decide that the marketing application does not satisfy the regulatory criteria for approval and refuse to approve the application by issuing a “not approvable” letter.
The length of the FDA’s review can range from a few months to several years or more. Once an NDA is in effect, significant changes such as the addition of one or more new indications for use generally require prior approval of an sNDA including additional clinical trials or other data required to demonstrate that the product as modified remains safe and effective.
Fast-Track Review
The Food and Drug Administration Modernization Act of 1997, or the Modernization Act, establishes a statutory program for relatively streamlined approval of “Fast-Track” products, which are defined under the Modernization Act as new drugs or biologics intended for the treatment of a serious or life-threatening condition that demonstrates the potential to address unmet medical needs for this condition. Fast-Track status requires an official designation by the FDA.
Abbreviated New Drug Application and Review
An ANDA is a type of NDA that is used for the review and approval of a generic drug product. A generic drug product is one that is the same as a previously approved innovator drug product, which means it has the same active ingredient, dosage form, strength, route of administration, quality, performance characteristics, and intended use. An ANDA is generally not required to include preclinical and clinical data to establish safety and effectiveness. Instead, generic applicants must

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scientifically demonstrate that their product is bioequivalent to the previously approved drug, which means that it performs in the same manner. None of the products currently under development by Molecular Insight will be eligible for ANDA approval, although it is possible that competing products based on our product could be approved by this route at some future time.
Section 505(b)(2) Applications
If a proposed drug product represents only a limited change from a product that has already been approved by the FDA, yet differs in more ways than those permitted under the ANDA requirements, then the applicant may be able to submit a type of NDA referred to as a 505(b)(2) application. This route of approval is potentially applicable to the development of Ultratrace MIBG, which has previously been approved as an imaging agent for pheochromocytoma and neuroblastoma. In effect, a 505(b)(2) applicant is permitted to rely on information in the scientific literature, or previous safety and efficacy determinations by the FDA, rather than submitting the full complement of clinical or other data that would otherwise be required for NDA approval. However, the 505(b)(2) sponsor must provide any additional clinical or other data needed to supplement and/or establish the relevance and applicability of prior findings for the new product formulation.
Orphan Drug Status
Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. We may file for orphan drug designation for the use of Ultratrace MIBG as a targeted radiotherapeutic for the treatment of neuroendocrine tumors, however obtaining FDA approval to market a product with orphan drug exclusivity may not provide us with a material commercial advantage.
Orphan drug designation must be requested before submitting an NDA. After the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Although orphan drug designation does not shorten or otherwise convey any advantage in the regulatory approval process, approved orphan drugs are to a seven year period of market exclusivity during which FDA may not approve any other application to market the same drug for the same disease except in very limited circumstances. These circumstances are an inability to supply the drug in sufficient quantities, or a situation in which a subsequent product has shown superior safety or efficacy. This exclusivity, however, could also block the approval of our product for seven years if a competitor obtains earlier approval of the same drug for the same indication.
Post-Approval Phase
Once the FDA has approved a new drug for marketing, the product becomes available for physicians to prescribe in the United States. After approval, we must comply with post-approval requirements, including ongoing compliance with cGMP regulations, delivering periodic reports to the FDA, submitting descriptions of any adverse reactions reported, and complying with drug sampling and distribution requirements. We are required to maintain and provide updated safety and efficacy information to the FDA. We are also required to comply with requirements concerning advertising and promotional labeling.
Compliance with post-approval requirements will require us to expend time, money, and effort on an ongoing basis. We use, and will continue to use, third-party manufacturers, including MDS Nordion, to produce certain of our products in clinical and commercial quantities. Future FDA inspections may identify compliance issues at our facilities or at the facilities of our contract manufacturers that may disrupt production or distribution, or require substantial resources to correct.
In addition, discovery of problems with a product or the failure to comply with requirements may result in restrictions including withdrawal or recall of the product from the market or other voluntary

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or FDA-initiated action that could delay further marketing. Newly discovered or developed safety or efficacy data may require changes to a product’s approved labeling, including the addition of new warnings and contraindications. Also, the FDA may require post-market testing and surveillance to monitor the product’s safety or efficacy, including additional clinical studies, known as Phase 4 trials, to evaluate long-term effects.
Other Regulation in the United States
Healthcare Reimbursement
Government and private sector initiatives to limit the growth of healthcare costs, including price regulation, competitive pricing, coverage and payment policies, and managed-care arrangements, are continuing in many countries where we do business, including the United States. These changes are causing the marketplace to put increased emphasis on the delivery of more cost-effective medical products. Government programs, including Medicare and Medicaid, private healthcare insurance and managed-care plans have attempted to control costs by limiting the amount of reimbursement they will pay for particular procedures or treatments. This has created an increasing level of price sensitivity among customers for our products. Some third-party payers must also approve coverage for new or innovative devices or therapies before they will reimburse healthcare providers who use the medical devices or therapies. Even though a new medical product may have been cleared for commercial distribution, we may find limited demand for the product until reimbursement approval has been obtained from governmental and private third-party payers.
Environmental Regulation
We are also subject to various environmental laws and regulations both within and outside the United States. Like many other pharmaceutical and medical device companies, our operations involve the use of substances, including hazardous wastes, which are regulated under environmental laws, primarily manufacturing and sterilization processes. We do not expect that compliance with environmental protection laws will have a material impact on our consolidated results of operations, financial position or cash flow. These laws and regulations are all subject to change, however, and we cannot predict what impact, if any, such changes might have on our business, financial condition or results of operations.
Our research is also dependent on our maintenance of a Radioactive Materials license from the Massachusetts Department of Public Health which allows us to acquire, use and store quantities of radioactive isotopes that are critical for the manufacture and testing of research products.
Foreign Regulation
Whether or not we obtain FDA approval for a product, we must obtain approval from the comparable regulatory authorities of foreign countries before we can commence clinical trials or marketing of the product in those countries. The approval process varies from country to country, and the time may be longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement also vary greatly from country to country. Although governed by the applicable jurisdiction, clinical trials conducted outside of the United States typically are administered under a three-phase sequential process similar to that discussed above for pharmaceutical products.
Under European Union regulatory systems, we may submit marketing authorization applications either under a centralized or decentralized procedure. The centralized procedure, which is available for medicines produced by biotechnology or which are highly innovative, provides for the grant of a single marketing authorization that is valid for all European Union member states. This authorization is a marketing authorization approval, or MAA. The decentralized procedure provides for mutual recognition of national approval decisions. Under this procedure, the holder of a national marketing

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authorization may submit an application to the remaining member states. Within 90 days of receiving the applications and assessment report, each member state must decide whether to recognize approval. This procedure is referred to as the mutual recognition procedure, or MRP.
In addition, regulatory approval of prices is required in most countries other than the United States. We face the risk that the prices which result from the regulatory approval process would be insufficient to generate an acceptable return to us or our collaborators.
Employees
As of September 30, 2005, we had 25 full-time employees and 1 part-time employee. None of our employees is represented by labor unions or covered by collective bargaining agreements. We have not experienced any work stoppages and we consider our employee relations to be good.
Facilities
Our principal executive and administrative office is a leased facility located in Cambridge, Massachusetts that consists of approximately 6,728 square feet of office space and 1,481 square feet of laboratory space. These facilities are occupied pursuant to a lease agreement that expires on June 30, 2008. We believe that our current facilities will meet our anticipated needs for the foreseeable future.
Legal Proceedings
On June 30, 2004 a small group of stockholders comprised of David Elmaleh, Havacom, N.V., IBS Turnaround Fund, L.P., John Pattillo and Greg Shoukimas commenced a civil suit in Massachusetts Superior Court against us and certain of our present and former officers. The complaint alleges that the officers breached fiduciary duties to us and to the plaintiffs by approving and benefiting from stock transactions in 2001 and 2002. The plaintiffs allege that these transactions resulted in our receiving less money in connection with the sale of stock and in an improper dilution of certain stockholders. In March 2005, the individual defendants moved for a dismissal of the claims asserted directly against them. On July 1, 2005, the Court found, as a matter of law, that the individual defendants did not breach their fiduciary duties to the plaintiffs and dismissed those claims, leaving only the derivative claims purportedly asserted on behalf of us pending. On October 11, 2005 the plaintiffs served a Motion for Reconsideration of the Court’s dismissal of their direct claims. There has been no Court action on this motion.
Promptly after receiving notice of the service of the complaint, the disinterested members of our Board of Directors appointed a Special Litigation Committee, or SLC, comprised of disinterested directors to investigate the allegations. The Special Litigation Committee has retained independent counsel at Wilmer, Cutler, Pickering, Hale and Dorr LLP to assist it in its investigation. On July 14, 2005, the SLC unanimously determined that the transactions in question were proper and submitted a report to the remaining disinterested members of the Board of Directors with its conclusions and the recommendation that we seek to terminate the remaining claims against us. On July 24, 2005, the remaining disinterested members of the Board of Directors adopted the report and its recommendations. On August 9, 2005, our counsel served a motion to dismiss the remaining derivative claims on plaintiffs and we await Court action on this motion. At the present time it is not possible to estimate the potential losses, if any, related to this lawsuit and we continue to protect our legal rights and defend ourselves in this suit.
We have indemnified the defendant officers pursuant to our bylaws, and will continue to indemnify them pursuant to our Restated Articles of Organization. See “Description of Capital Stock — Indemnification of Directors and Executive Officers and Limitation of Liability.”
Except for the foregoing, we are not a party to any material legal proceedings.

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MANAGEMENT
Executive Officers, Key Employees and Directors
The following table sets forth certain information with respect to our executive officers, key employees and members of our Board of Directors and a nominee to our Board of Directors as of September 30, 2005:
             
Name   Age   Position(s)
         
David S. Barlow*
    48     Chairman of the Board of Directors; Chief Executive Officer
John W. Babich, Ph.D.*
    48     Director; President and Chief Scientific Officer
John E. McCray*
    55     Chief Operating Officer
Nicholas Borys, M.D.*
    46     Chief Medical Officer
Bob Gallahue, C.P.A.*
    45     Chief Financial Officer
John Barrett, Ph.D. 
    51     Vice President of Research
Joshua Hamermesh
    33     Vice President of Commercial and Business Development
Priscilla Harlan
    52     Vice President, Corporate Communications
James F. Kronauge, Ph.D. 
    50     Vice President, Process Chemistry
James Wachholz
    52     Vice President, Regulatory Affairs and Quality Assurance
William C. Eckelman, Ph.D.
    64     Director
Daniel Frank
    48     Director
Kim Lamon, M.D., Ph.D. 
    53     Director
Harry Stylli, Ph.D. 
    44     Director
Andrew Jay, D.M.D. (4)
    43     Director
Lionel Sterling (4)
    68     Director Nominee
 
Denotes executive officer.
(1) Member of the Audit Committee.
(2) Member of the Compensation Committee.
(3) Member of the Governance and Nominating Committee.
(4) Dr. Jay has agreed to resign from our Board of Directors as of the listing of our common stock on the Nasdaq National Market and Mr. Sterling has agreed to join our Board of Directors as of such time.
David S. Barlow has served as the Chairman of our Board of Directors and our Chief Executive Officer since January 2003. He has more than 25 years of experience in the global biopharmaceutical industry. He joined Molecular Insight as its Chairman in early 2000 and added the Chief Executive Officer responsibilities in January 2003. Prior to Molecular Insight, Mr. Barlow was President, Pharmaceuticals at Sepracor Inc. During his tenure at Sepracor from 1993 to 1999, Pharmaceuticals was built into a fully integrated pharmaceutical company with a strong product pipeline, a complete research and development and United States sales and marketing capability, and several significant corporate partnerships. Before Sepracor, Mr. Barlow worked for Rhone-Poulenc Rorer, where he led the turnaround of the Armour Pharmaceutical Division. He had previously worked for Pfizer Inc and ARES-Serono in a variety of business development and marketing positions. Mr. Barlow is a Trustee of McLean Hospital, Bates College, and Newton Country Day School and on the Board of Directors of New River Pharmaceuticals. He is also a member of the President’s Council at Massachusetts General Hospital. Mr. Barlow received a B.A. from Bates College and an M.B.A. from Stanford University.

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John W. Babich, Ph.D., a founder of the Company in 1997, serves as our President and Chief Scientific Officer, and is a member of our Board of Directors. He has been an active researcher in the field of molecular imaging and targeted radionuclide therapy for the past 20 years. Prior to joining the Company, he was Assistant Professor of Radiology at Harvard Medical School and Staff Radiopharmaceutical Chemist at Massachusetts General Hospital (MGH), Boston, Massachusetts. Prior to joining MGH, Dr. Babich was Principal Scientist and Head of the Radiopharmaceutical Section at the Institute of Cancer Research in England. Dr. Babich’s current research efforts focus on molecular imaging in cardiovascular disease, oncology and neurology. His previous research experience includes detection of breast and colorectal cancer using monoclonal antibodies, pharmacological and in vivo biological studies of novel small molecules for targeted therapy of neuroblastoma, the use of peptide-based molecular imaging agents for the detection of infection and cancer, and the use of positron emission tomography for the study of drug behavior in humans. He has published more than 100 research articles in a variety of peer-reviewed journals as well as several book chapters and invited reviews. He is inventor or co-inventor of several issued and pending patents licensed to or property of the Company. He is also co-inventor of a cardiac imaging product currently marketed by Mallinckrodt-TycoHealthcare, Inc. as Ultra-Tag. Dr. Babich recently served as President of the Society of Nuclear Medicine’s Radiopharmaceutical Science Council. Dr. Babich received a B.S. in Pharmacy from St. John’s University, an M.S. from University of Southern California, and a Ph.D. from the University of London.
John E. McCray has served as our Chief Operating Officer since joining Molecular Insight in March 2003. He has over 20 years of marketing, operations and public policy experience in the biopharmaceutical industry, including product launches, manufacturing scale-up and new market openings in developing countries. From 1999 to 2003, Mr. McCray served as the Chief Operating Officer at Pan Pacific Pharmaceuticals. For six years ending in 1999, he worked with various subsidiaries of Sepracor Inc. Before joining Sepracor, Mr. McCray held the position of Director, Worldwide Marketing at Armour Pharmaceutical Company. His pharmaceutical experience also includes a five-year tenure at Pfizer Inc where he managed reimbursement, formulary and public policy issues. Mr. McCray received a B.A. from the University of Texas and an M.B.A. from The Wharton School, University of Pennsylvania.
Nicholas Borys, M.D. has served as our Chief Medical Officer since April 2004. He has 15 years of experience in the pharmaceutical and healthcare industry including drug development work with molecular imaging companies. His background includes strategic planning and management of pharmaceutical development for FDA approval. From 2002 to 2004 he worked at Taiho Pharma USA, where he served as Chief Medical Officer for global clinical development. Dr. Borys’ molecular imaging experience includes BRACCO Diagnostics where he was Executive Medical Director from 2000 to 2002, responsible for early and late stage development for international development projects in both MRI and nuclear medicine. He also served for six years as Director of Medical Affairs for Amersham Healthcare, Inc. where he oversaw development of cardiovascular, oncology and neurology products. Dr. Borys has also worked as a senior medical affairs officer of two oncology companies, Cytogen Corporation and Anthra Pharmaceuticals, and as Director, Medical and Clinical Services for a division of Hoffman La-Roche, Inc. Dr. Borys received a B.A. from Rutgers University and an M.D. from the American University of the Caribbean.
Bob Gallahue, C.P.A. has served as our Chief Financial Officer since July 2005. He has over 15 years of financial management experience at public and private biotechnology companies, including Millennium Pharmaceuticals, LeukoSite, Inc., Keryx Biopharmaceuticals and VaxInnate Corp. He joined Molecular Insight from VaxInnate, where he was Interim Chief Financial Officer from 2004 to 2005. From 2000 to 2003, he was Chief Financial Officer and Treasurer of Keryx Biopharmaceuticals. Prior to Keryx, he served in financial positions at LeukoSite, Inc., which was later acquired by Millennium Pharmaceuticals, and Repligen Corporation. Mr. Gallahue is a C.P.A and received a B.A. from Middlebury College and an M.S.A. from Bentley College.

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John A. Barrett, Ph.D. has served as our Vice President of Research since August 2005. He has over 20 years of experience in the discovery and development of agents in oncology and angiogenesis-directed tumor imaging and therapy. He came to Molecular Insight from Infinity Pharmaceuticals where he worked from 2003 to 2005 and served as the Senior Director Pharmacology/ Toxicology, ADME, and Bioanalytical Chemistry. Prior to Infinity Pharmaceuticals, Dr. Barrett was Senior Director of Pharmacology/ Toxicology at EPIX Medical, Inc. from 2000 to 2003. In 1993, Dr. Barrett was recruited to DuPont Merck Radiopharmaceutical Division as a Principal Research Scientist in Biological Research Imaging, and later was appointed as Director Discovery Biology Research Imaging and Animal Resources. He has held positions at Rorer Pharmaceuticals where he was Group Leader of Cardiovascular Pharmacology and as Research Manager in Vascular Biology at the RWJ Pharmaceutical Research Institute. Dr. Barrett received a B.S. from the State University of New York at Oneonta and a Ph.D. from St. John’s University.
Joshua Hamermesh has served as our Vice President of Commercial and Business Development since May 2005. From 1999 to 2005, he worked at Genzyme Corporation, where he was the Business Director, Cardiac Cell Therapy and Chief Operating Officer of the company’s MG Biotherapeutics unit. Mr. Hamermesh held several cardiovascular product marketing and business development positions at Genzyme, including Director, Cardiovascular Business Development and Marketing Manager, Genzyme Surgical Products. Previously, he was a strategy consultant at Monitor Company. Mr. Hamermesh received a B.A. from Amherst College and an M.B.A. from Harvard Business School.
Priscilla Harlan has served as our Vice President, Corporate Communications since July 2005. From 2000 to 2005, Ms. Harlan worked at Complete Healthcare Communications, a medical communications consultancy, where she was an Account Director for pharmaceutical clients. Previously, she served in senior investor relations positions at Feinstein Kean Healthcare, a communications consulting firm, where she designed and implemented strategic communications initiatives for emerging companies. Prior to that she directed corporate communications and investor relations at Sepracor, Inc. and one of its subsidiaries. Ms. Harlan received a B.A. in Biology and History from the University of North Carolina.
James F. Kronauge, Ph.D. has served as our Vice President of Process Chemistry since August 2005. He joined the company in December 1999. He has been an active researcher in the field of radiology and nuclear medicine for the past 20 years and has published more than 50 research articles in a variety of peer-reviewed journals. He is inventor or co-inventor of six issued patents, including one for the use of Cardiolite, a perfusion imaging agent for the detection of cardiac ischemia. Prior to joining Molecular Insight, he was Assistant Professor of Radiology at Harvard Medical School and Associate Director of Radiopharmacy in the Joint Program in Nuclear Medicine at Brigham and Women’s Hospital, Boston, Massachusetts. His research efforts have focused on the development of diagnostic agents for measurement of tissue perfusion in cardiovascular disease, developing imaging agents for the detection of various cancers and monitoring multi-drug resistance in tumors. His experience includes synthetic organic and inorganic chemistry, elucidation of drug interactions by in vitro cell culture techniques and in vivo animal models, HPLC analysis, pharmacodynamics and metabolism studies, radiochemistry and pharmaceutical chemistry. He has been involved with the discovery and development of CardioGen (Bracco) and Mebrofennin (Bracco). Dr. Kronauge received a B.S in Chemistry from the University of Cincinnati, an M.S. from Rutgers University and a Ph.D. in Inorganic Chemistry from M.I.T. under the guidance of Professor Alan Davison.
James Wachholz has served as our Vice President, Regulatory Affairs and Quality Assurance since May 2005. He has over 20 years of experience in regulatory affairs and product development at biotechnology and pharmaceutical companies. From 2003 to May 2005, he worked at Accentia Biopharmaceuticals, where he served as Chief Regulatory Officer. From 1998 to 2003 Mr. Wachholz worked at Sepracor Inc., where he served as the Executive Director of Regulatory Affairs. Previously, Mr. Wachholz held regulatory and compliance positions at Hybridon, Inc., Searle Pharmaceuticals and

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Baxter International. Mr. Wacholz received a B.S. in Biochemistry from Northwestern University and an M.B.A. from DePaul University.
William C. Eckelman, Ph.D. has served as a member of our Board of Directors and Chair of our scientific advisory committee since December 2000. From 1991 to 2004, he was Chief of the Positron Emission Tomography (PET) Department at the National Institutes of Health. From 1987 to 1991, Dr. Eckelman worked at Squibb Institute for Medical Research, where he served as the Vice President for Diagnostics Research & Development. In addition to his research efforts, Dr. Eckelman has been the editor-in-chief of Nuclear Medicine and Biology since 1985 and a member of the Diagnostic Radiology Study section from 1982 to 1986 and 1998 to 2001. He has also served the Society of Nuclear Medicine, the Department of Energy and the National Academy of Sciences in various capacities. Dr. Eckelman received the Paul C. Aebersold Award for Outstanding Achievement in Basic Science, Applied to Nuclear Medicine in 1988 and the American College of Nuclear Physicians Corporate Achievement Award in 1995. He also has received the Georg deHevesy Nuclear Pioneer Award in 1997, the Institute for Clinical PET Distinguished Scientist Award in 2000, and the Great Golden Seal of Padua University in recognition of contributions to Radiopharmaceutical Development in 2002. He has published over 380 research papers, books and book chapters. Dr. Eckelman received a B.S. from St. Louis University, an M.A. from Washington University in St. Louis and his Ph.D. from Washington University.
Daniel Frank has served as a member of our Board of Directors since 2004. Since 2001, he has worked at Cerberus Capital Management, L.P., a private investment firm. From 1999 to 2001, Mr. Frank served as a Managing Director and Portfolio Manager of ACI Capital Strategic Fund, a New York-based hedge fund, and prior to that he served as a portfolio manager for Chatterjee/ Soros Fund Management. From 1979 to 1996, Mr. Frank was employed by Fidelity Management and Research (Fidelity Investments). While at Fidelity, Mr. Frank served as Assistant Portfolio Manager to Peter Lynch on the Magellan Fund and as Vice President and sole Portfolio Manager, for over a decade, of the Fidelity Strategic Opportunities/ Special Situations Fund. In 1996, Mr. Frank was ranked by Barron’s magazine as one of the Top 100 U.S. Mutual Fund Managers. Mr. Frank served on the Board of Directors of i-STAT Corporation from 2001 until its sale to Abbott Laboratories in 2003. From 1986 until its sale in 1996, Mr. Frank was board member and largest stockholder of Corsearch, a New York-based trademark research firm that is now part of CCH-Wolters Klower Inc. Mr. Frank received a B.S. and a B.A. from Boston University School of Management.
Kim D. Lamon, M.D., Ph.D. has served as a member of our Board of Directors since 2004. He has more than 20 years of experience in the pharmaceutical, biotechnology and diagnostics industries. Dr. Lamon was appointed to Valeant Pharmaceutical International’s Board of Directors in August 2002. Since January 2003, Dr. Lamon has worked at Ribapharm, Inc., where he served as the President and Chief Executive Officer and was subsequently appointed President and Chief Scientific Officer upon the reacquisition of Ribapharm by Valeant in September 2003. From 1999 to 2003, Dr. Lamon worked at SciPharma Consulting, LLC, a consulting company to the biotechnology, diagnostics and pharmaceutical industries, where he served as President. From 1996 to 1999, he worked at Covance Clinical and Periapproval Services, were he served as Corporate Senior Vice President and Group President. From 1994 to 1996, Dr. Lamon served as Executive Vice President and Chief Medical Officer for Corning Clinical Laboratories (now Quest Diagnostics, Inc.), as well as Senior Vice President of Science and Technology for Corning Life Sciences, Inc. From 1982 to 1994, he also served as Senior Vice President and Executive Medical Director for Rhone-Poulenc Rorer (now sanofi-aventis) and held other senior management positions in this company. Currently, Dr. Lamon serves on the Scientific Advisory Board of VivoMetrics, Inc. Dr. Lamon served on the Board of Directors of Valeant Pharmaceutical International. Dr. Lamon received an M.D. and a Ph.D. from the Thomas Jefferson University School of Medicine, and a B.S. in Biology and Chemistry from Juniata College in Huntingdon, Pennsylvania. He is trained as an internist and pharmacologist.

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Harry Stylli, Ph.D. has served as a member of our Board of Directors since 2004. Dr. Stylli has been Chief Executive Officer of Sequenom since 2005. From 2004 until 2005 he was President and Chief Executive Officer of Xenecor. Dr. Stylli co-founded Aurora Biosciences in 1995, where he served as Senior Vice President of Screening Technology and New Ventures from 2001 to 2002 and as Senior Vice President of Commercial Development from 1999 to 2001. In 2001, following the merger between Aurora and Vertex Pharmaceuticals, Dr. Stylli served as President of Aurora Biosciences and Panvera. From 2002 to 2003, he served as President and Chief Executive Officer of CovX Pharmaceuticals. From 1987 to 1995, Dr. Stylli held varying positions of increasing responsibility in the global discovery organization of GlaxoSmithKline. He currently serves as a Director of Scitegic, a privately-held bioinformatics company. Dr. Stylli received a B.S. from the University of East London, an M.B.A from Open University in the United Kingdom and his Ph.D. from London University.
Andrew Jay, D.M.D. has served as a member of our Board of Directors since 2005 and has agreed to resign from our Board of Directors as of the listing of our common stock on the Nasdaq National Market. Since 2002 he has headed the Medical Solutions Fund at Siemens Venture Capital Inc. From 1994 to 2002, he was an analyst following the medical technology industry at Alex Brown and Wachovia Securities. Dr. Jay’s prior experience includes consulting for Arthur D. Little and operating his dental practice. Dr. Jay received a B.S from Rensselaer Polytechnic Institute, a D.M.D. from the University of Pennsylvania and an M.B.A. from the Kellogg School at Northwestern.
Lionel Sterling has agreed to join our Board of Directors as of the listing of our common stock on the Nasdaq National Market. In 1987, Mr. Sterling founded Equity Resources Inc., a private investment firm, where he has served as President since 1987. He is currently a member of the Board of Directors of Third Wave Technologies. From 1988 to 1993, Mr. Sterling served as co-Founder and Managing Partner of Whitehead/ Sterling, a private investment firm, and from 1981 to 1985, he served as Chairman of the Board of Rayovac Corporation. In addition, from 1981 to 1982, Mr. Sterling served as Executive Vice President and member of the Board of Directors of United Brands Company, and from 1974 to 1981, he was with American Can Company, where he served as a Chief Financial Officer and Sector Executive. He has also served as Vice President and a managing director of Donaldson, Lufkin & Jenrette, Inc.’s venture capital and private investment activities, as well as having held various operating and financial responsibilities at ITT Corporation within its technology and services divisions. Mr. Sterling has held a number of public and private Board positions and has served as an advisor to a number of venture capital and buyout firms, as well as being an investor in a number of privately-held companies. Mr. Sterling has been on the Board of Overseers of New York University Schools of Business and on the Board of Overseers of the Dartmouth Institute, and serves with a number of non-profit organizations. Mr. Sterling received a B.A. from Brooklyn College in New York and an M.B.A. in Finance from New York University.
Our Board of Directors currently consists of seven members and upon the closing of this offering, two newly created vacancies, which can be filled by the action of a majority of the directors then in office. Our Board of Directors has determined that, upon the closing of this offering, four of its members will be “independent directors” as defined under the rules of the Nasdaq Stock Market, Inc. and Rule 10A-3(b)(i) under the Securities Exchange Act of 1934. The independent members will consist of Messrs. Frank, Lamon, Stylli and nominee Sterling. Dr. Jay has agreed to resign from our Board of Directors as of the listing of our common stock on the Nasdaq National Market and Mr. Sterling has agreed to join our Board of Directors as of such time.
Effective upon the closing of this offering, our Board of Directors will divide into three classes that will serve staggered three-year terms:
  •  Class I, whose initial term will expire at the annual meeting of stockholders to be held in 2006;
 
  •  Class II, whose initial term will expire at the annual meeting of stockholders to be held in 2007; and

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  •  Class III, whose initial term will expire at the annual meeting of stockholders to be held in 2008.
Upon the closing of this offering, Class I will initially consist of Messrs. Frank, Eckelman and Lamon; Class II will consist of Messrs. Stylli and Sterling and Class III will consist of Messrs. Barlow and Babich. At each annual meeting of stockholders after the initial classification, the successors to directors whose terms will expire on such date shall serve from the time of election and qualification until the third annual meeting following election and until their successors are duly elected and qualified.
Committees of the Board of Directors
Our Board of Directors has established an audit committee, a compensation committee, and a governance and nominating committee that will be constituted as of the completion of this offering:
Audit Committee. The audit committee will perform the following functions, among others:
  •  appointing and replacing our independent registered public accounting firm;
 
  •  reviewing compliance with legal and regulatory requirements;
 
  •  evaluating our audit and internal control functions;
 
  •  review the proposed scope and results of the audit; and
 
  •  review and pre-approve the independent registered public accounting firm’s audit and non-audit services rendered.
Upon the listing of our stock on Nasdaq, the audit committee will consist of three independent directors,                     ,                     and                     . Each member of the audit committee is able to read and understand fundamental financial statements, including our balance sheet, income statement and cash flows statements. Our Board of Directors has determined that                     is an “audit committee financial expert” as that term is defined in Securities and Exchange Commission regulations. The Board of Directors has approved and adopted a written charter for the audit committee, and the chairperson of the audit committee will be selected following this offering.
Compensation Committee. The compensation committee will perform the following functions, among others, as set forth in its committee charter:
  •  recommending and approving salaries, incentive compensation, and equity-based plans for our executive officers and managers;
 
  •  reviewing corporate goals and objectives relative to executive compensation;
 
  •  evaluating our Chief Executive Officer’s performance in light of corporate objectives;
 
  •  setting our Chief Executive Officer’s compensation based on the achievement of corporate objectives;
 
  •  developing plans for Chief Executive Officer succession; and
 
  •  preparing and issuing reports required under the committee charter.
Following this offering, the compensation committee will be comprised of Messrs.                     ,                     and                     . The chairperson of the compensation committee will be selected following this offering.

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Governance and Nominating Committee. The governance and nominating committee will perform the following functions, among others, as set forth in its committee charter:
  •  developing criteria for director selection;
 
  •  identifying and recommending to the full Board of Directors the director-nominees to stand for election at annual meetings of the stockholders;
 
  •  recommending members of the Board of Directors to serve on the various committees of the Board of Directors;
 
  •  evaluating and ensuring the independence of each member of each committee of the Board of Directors;
 
  •  recommending to the Board of Directors our corporate governance principles; and
 
  •  recommending to the Board of Directors a code of conduct for our company’s directors, officers and employees.
The governance and nominating committee will be comprised of Messrs.                     ,                     and                     , and the chairperson of the governance and nominating committee will be selected following this offering. Prior to this offering, the activities of the governance and nominating committee were conducted by the full Board.
Scientific Advisory Board. Our Board of Directors has established a group of respected scientists in the biochemistry, organic and inorganic chemistry, cardiology, radiation oncology, nuclear medicine and radiology fields to advise it on scientific, technical and commercialization issues. The scientific advisory board does not have any authority with respect to the governance of our company but provides advice on the scientific results and strategy of our products and research and development efforts. The advisors are currently William C. Eckelman, Ph.D., who serves as chairman; Ronald L. Van Heertum, M.D.; Ross J. Baldessarini, M.D.; Peter Conti, M.D., Ph.D.; Alan Davison, Ph.D., F.R.S.; Duncan H. Hunter, Ph.D.; Alan P. Kozikowski, Ph.D.; Rob Mairs, Ph.D.; H. William Strauss, M.D.; Vladimir Torchilin, Ph.D.; John F. Valliant, Ph.D.; Barry Zarett, M.D.; and Jon A. Zubieta, Ph.D.
Compensation Committee Interlocks
No member of the Compensation Committee serves as a member of the Board of Directors or compensation committee of any entity that has one or more executive officers serving as a member of our Board of Directors.
Director Compensation
Currently, non-employee directors who are not affiliated with any principal stockholder receive a fee of $36,000 per year, payable quarterly, as a retainer fee for service on our Board of Directors and its committees. In addition, each such director receives $1,500 for each meeting of the Board of Directors attended in person and $500 for each meeting of the Board of Directors attended via teleconference. All of our non-employee and non-investor-related directors are also eligible to receive stock option grants under our 1997 Stock Option Plan. These grants are for the purchase of up to  shares of Common Stock and vest over a two year period with 50% of the options vesting on the end of the first anniversary of the date of grant and the balance upon the second anniversary of the date of grant if the optionee is still a director as of the vesting date. The options have a ten year term and an exercise price equal to the fair market value of our common stock as of the date of grant. No director who is an employee or who is affiliated with any principal stockholder receives separate compensation for services rendered as a director.

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We intend to adopt a new director compensation policy to be effective upon completion of this offering. Under this new policy, all non-employee directors will receive $36,000 per year, payable quarterly, as a retainer fee for service on our Board of Directors and its committees. The non-employee directors will also receive a fee of $1,500 for each meeting of the Board of Directors attended in person, $500 for each meeting of the Board of Directors attended via teleconference, and $500 for each committee meeting attended either in-person or via teleconference. The chairman of the audit committee will receive an additional $12,000 per year and the chairman of each other committee of the Board of Directors will receive an additional $8,000 per year. Under this policy, upon initial election to the Board of Directors and upon each anniversary of such election during the director’s three year term, a non-employee director will receive an automatic stock option grant to purchase 25,000 shares of our common stock. Each such option will have a term of ten years, an exercise price equal to the fair market value as of the date of grant and will vest at the end of one year from the date of grant. A non-employee director will be entitled to similar automatic option grants upon reelection to the Board of Directors and for each year of subsequent three year terms of service. No director who is an employee will receive separate compensation for services rendered as a director.
Executive Compensation
The following summary compensation table sets forth information concerning compensation for services rendered to us in all capacities during the year ended December 31, 2004 by our Chief Executive Officer and other executive officers, otherwise referred to as our named executive officers, for the year ended December 31, 2004.
SUMMARY COMPENSATION TABLE
                                                 
        Long-Term    
    Annual Compensation   Compensation    
             
        Securities    
        Other Annual   Underlying   All Other
Name and Principal Position   Year   Salary   Bonus   Compensation   Options   Compensation
                         
David S. Barlow, Chief Executive Officer
    2004     $ 215,769     $ 176,000                          
John Babich, President, Chief Scientific Officer
    2004       200,600       160,000                          
John McCray, Chief Operating Officer
    2004       175,000       126,875                          
Nicholas Borys, Chief Medical Officer
    2004       147,692       77,625                          
Bob Gallahue, Chief Financial Officer
    2004*                                          
Mr. Gallahue’s employment began on July 1, 2005.

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OPTIONS GRANTED LAST YEAR
The following table sets forth information with respect to grants of stock options by us during our 2004 fiscal year to our named executive officers. Potential realizable value represents hypothetical gains that could be achieved for the options if exercised at the end of the option term based upon the assumed initial public offering price of our common stock of $          , which is the mid-point of the range listed on the cover of this prospectus. The assumed 5% and 10% rates of stock price appreciation are provided in accordance with the rules of the Securities and Exchange Commission and do not represent our estimate or projection of our future common stock price.
                                                         
        Potential Realizable
    Individual Grants   Value at Assumed
        Annual
    Number   Percentage       Market       Rates of Stock
    of   of Total       Price of       Price
    Securities   Options       Underlying       Appreciation for
    Underlying   Granted to   Exercise   Security       Option Term
    Options   Employees   Price   on Date of   Expiration    
Name   Granted   in 2004 (1)   Per Share   Grant   Date   5%   10%
                             
David S. Barlow,
Chief Executive Officer
                                                       
John Babich,
President, Chief Scientific Officer
                                                       
John McCray,
Chief Operating Officer
                                                       
Nicholas Borys,
Chief Medical Officer
            57.14 %                     5/13/14                  
Bob Gallahue,
Chief Financial Officer
                                                       
 
(1) Based on an aggregate of                 shares subject to options granted by us to our employees in fiscal year 2004, including named executive officers.
AGGREGATE OPTION EXERCISES IN LAST YEAR AND YEAR-END VALUES
The following table sets forth information with respect to the aggregate stock option exercises by our named executive officers during our 2004 fiscal year and the year-end value of unexercised options held by such executive officers. There was no public trading market for our common stock as of December 31, 2004. Accordingly, these values have been calculated on the basis of the mid-point of the estimated price range set forth on the cover of this prospectus, which is $          , less the applicable exercise price per share, multiplied by the number of shares issued or issuable, as the case may be, on

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the exercise of the option. This mid-point does not necessarily represent the actual value of our common stock at December 31, 2004.
                                                 
            Number of Unexercised   Value of Unexercised in-the-
    Shares       Options at Year End   Money Options at Year End
    Acquired on   Value        
Name   Exercise   Realized   Exercisable   Unexercisable   Exercisable   Unexercisable
                         
David S. Barlow,
Chief Executive Officer
                                               
John Babich,
President, Chief Scientific Officer
                                               
John McCray,
Chief Operating Officer
                                               
Nicholas Borys,
Chief Medical Officer
                                               
Bob Gallahue,
Chief Financial Officer
                                               
 
Executive Employment Agreements
David S. Barlow. On February 7, 2003, we entered into an employment agreement with David S. Barlow, Chairman of our Board of Directors and our Chief Executive Officer. Either we or Mr. Barlow may terminate the employment agreement at any time, with or without cause. However, if we terminate Mr. Barlow’s employment without cause or he voluntarily resigns for good reason, then he will be entitled to severance compensation of one year’s base salary for the 12-month period following the date of termination and continuation of any benefits, including health insurance, for the 12-month period. For purposes of the agreement, good reason means the reduction of Mr. Barlow’s salary or insurance benefits without his consent, a significant change in Mr. Barlow’s title, responsibilities and/or duties which constitutes a demotion or the relocation of his principal place of employment by more than 50 miles. Mr. Barlow is entitled to a base salary of $330,000 per year for the year 2005. The agreement further provides that during the time of his employment and ending one year from the termination of the agreement, he may not solicit customers and will not engage in or own any business that is competitive with us. In connection with his employment, Mr. Barlow was issued an option to purchase                     shares of restricted common stock for a purchase price of $           per share. Mr. Barlow immediately exercised the option and purchased the common shares pursuant to a stock restriction agreement. The shares were paid for with a cash payment of $32,850 and a non-interest bearing promissory note in the amount of $295,650. On November 4, 2005, Mr. Barlow repaid this loan in full. See discussion in note 3 of our audited consolidated financial statements relating to the accounting treatment pertaining to the repayment of this loan. The shares of restricted stock vest over a four-year period, with 20% vested on the date of purchase and 5% vesting with the close of each three-month period thereafter while Mr. Barlow remains employed by us. Under the agreement, Mr. Barlow is entitled to piggy-back registration rights for the vested shares, which he has waived for this offering. See the section captioned “Description of Capital Stock — Registration Rights” for a description of these rights.
John Babich. On January 1, 2003, we entered into an employment agreement with John Babich, our President and Chief Scientific Officer. Either we or Mr. Babich may terminate the employment agreement at any time, with or without cause. However, if we terminate Mr. Babich’s employment without cause or he voluntarily resigns for good reason, then he will be entitled to severance compensation of one year’s base salary for the 12-month period following the date of termination and continuation of any benefits, including health insurance, for the 12-month period. For purposes of the agreement, good reason means the reduction of Mr. Babich’s salary or insurance benefits without his consent, a significant change in Mr. Babich’s title, responsibilities and/or duties which constitutes a

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demotion or the relocation of his principal place of employment by more than 50 miles. Mr. Babich is entitled to a base salary of $300,000 per year for the year 2005. The agreement further provides that during the time of his employment and ending one year from the termination of the agreement, he may not solicit customers and will not engage in or own any business that is competitive with us. In connection with his employment, Mr. Babich was granted incentive stock options to purchase up to                     shares of our common stock at an exercise price of $           per share. These options vest over a four-year period with 20% vested on the date of purchase and 5% vesting with the close of each three-month period thereafter while Mr. Babich remains employed by us. The vesting provisions accelerate so that all of these options are vested upon the closing of a sale of the Company. Under the agreement, Mr. Babich is entitled to piggy-back registration rights for the shares issued upon exercise of these options and for his additional stock, which rights he has waived for this offering. See the section captioned “Description of Capital Stock — Registration Rights” for a description of these rights.
John McCray. On March 3, 2003, we entered into an employment agreement with John McCray, our Chief Operating Officer. Either we or Mr. McCray may terminate the employment agreement at any time, with or without cause. However, if we terminate Mr. McCray’s employment without cause or he voluntarily resigns for good reason, then he will be entitled to severance compensation of one year’s base salary for the 12-month period following the date of termination and continuation of any benefits, including health insurance, for the 12-month period. For purposes of the agreement, good reason means the reduction of Mr. McCray’s salary or insurance benefits without his consent, a significant change in Mr. McCray’s title, responsibilities and/or duties which constitutes a demotion or the relocation of his principal place of employment by more than 50 miles. Mr. McCray is entitled to a base salary of $210,000 per year for the year 2005. The agreement further provides that during the time of his employment and ending one year from the termination of the agreement, he may not solicit customers and will not engage in or own any business that is competitive with us. In connection with his employment, Mr. McCray was granted incentive stock options to purchase up to                     shares of our common stock at an exercise price of $           per share. These options vest over a four-year period with 20% vested on the date of purchase and 5% vesting with the close of each three-month period thereafter while Mr. McCray remains employed by us. The vesting provisions accelerate so that all of these options are vested upon the closing of a sale of the Company. Under the agreement, Mr. McCray is entitled to piggy-back registration rights for the shares issued upon exercise of these options and for his additional stock, which rights he has waived for this offering. See the section captioned “Description of Capital Stock — Registration Rights” for a description of these rights.
Nicholas Borys. On May 1, 2004, we entered into an employment agreement with Nicholas Borys, our Chief Medical Officer. Either we or Mr. Borys may terminate the employment agreement at any time, with or without cause. However, if we terminate Mr. Borys’ employment without cause or he voluntarily resigns for good reason, then he will be entitled to severance compensation of one year’s base salary for the 12-month period following the date of termination and continuation of any benefits, including health insurance, for the 12-month period. For purposes of the agreement, good reason means the reduction of Mr. Borys’ salary or insurance benefits without his consent, a significant change in Mr. Borys’ title, responsibilities and/or duties which constitutes a demotion or the relocation of his principal place of employment by more than 50 miles. Mr. Borys is entitled to a base salary of $250,000 per year for the year 2005. The agreement further provides that during the time of his employment and ending one year from the termination of the agreement, he may not solicit customers and will not engage in or own any business that is competitive with us. In connection with his employment, Mr. Borys was granted incentive stock options to purchase up to                     shares of our common stock at an exercise price of $           per share. These options vest over a four-year period with 25% vesting on each anniversary of Mr. Borys’ date of hire as long as Mr. Borys is employed by us. The vesting provisions accelerate so that all of these options are vested upon the closing of a sale of the Company. Additionally, Mr. Borys is eligible to receive an additional option to purchase                     shares of common stock if certain performance objectives are met, with the objectives to be mutually

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determined by Mr. Borys and us. Under the agreement, Mr. Borys is entitled to piggy-back registration rights for the shares issued upon exercise of these options and for his additional stock, which rights he has waived for this offering. See the section captioned “Description of Capital Stock — Registration Rights” for a description of these rights.
Bob Gallahue. On July 1, 2005, we entered into an employment agreement with Bob Gallahue, our Chief Financial Officer. Either we or Mr. Gallahue may terminate the employment agreement at any time, with or without cause. However, if we terminate Mr. Gallahue’s employment without cause or he voluntarily resigns for good reason, he will be entitled to severance compensation of one year’s base salary for the 12-month period following the date of termination and continuation of any benefits, including health insurance, for the 12-month period. For purposes of the agreement, good reason means the reduction of Mr. Gallahue’s salary or insurance benefits without his consent, a significant change in Mr. Gallahue’s title, responsibilities and/or duties which constitutes a demotion or the relocation of his principal place of employment by more than 50 miles. Under the terms of the agreement, Mr. Gallahue is entitled to a base salary of $225,000 per year. The agreement further provides that during the time of his employment and ending one year from the termination of the agreement, he may not solicit customers and will not engage in or own any business that is competitive with us. In connection with his employment, Mr. Gallahue was granted incentive stock options to purchase up to           shares of our common stock at an exercise price of $          per share.            of these options vest in four equal installments on the anniversary of Mr. Gallahue’s date of hire with the remainder vesting on the fourth anniversary of the date of hire. The vesting provisions accelerate so that all of these options are vested upon the closing of a sale of the Company.
1997 Stock Option Plan
Our Board of Directors and stockholders adopted the 1997 Stock Option Plan, or 1997 Plan, on January 9, 1997. The 1997 Plan provides for grants of incentive stock options, within the meaning of Section 422 of the Internal Revenue Code of 1986, as amended, to our employees and for grants of non-qualified stock options to our employees, consultants and directors. The 1997 Plan was adopted to facilitate the retention of current employees, consultants and directors as well as to secure and retain the services of new employees, consultants and directors, and to provide incentive for such persons to exert maximum efforts to promote our financial success.
The 1997 Plan is administered by our Board of Directors unless the Board of Directors delegates the administration to its compensation committee. The administrator has the power to administer and interpret the 1997 Plan, including determining the terms of the options granted, the exercise price, the number of shares subject to the option and the vesting of the options thereof. The administrator of the 1997 Plan establishes the option exercise price. In the case of an incentive stock option, the exercise price must be at least the fair market value of a share of the stock on the date of the grant or, in the case of all options, 110% of fair market value with respect to optionees who own at least 10% of all classes of stock. Fair market value is determined in good faith by our Board of Directors, or the compensation committee if so empowered, and in a manner consistent with the Internal Revenue Code in the case of incentive stock options.
Options granted under the 1997 Plan are generally not transferable by the optionee except by will or the laws of descent and distribution, and each option is exercisable, during the lifetime of the optionee, only by the optionee. In the case of an incentive stock option granted to an employee, the option must be exercised within three months following the date of the optionee’s employment other than for death or disability (or before the termination, in the case of a termination for cause), or 12 months following the optionee’s termination by disability or death. However, in no event may an option be exercised later than the earlier of the expiration of the term of the option or ten years from the date of the grant of the option or, where an optionee owns stock representing more than 10% of the voting power, five years from the date of the grant of the option in the case of incentive stock options.

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Any incentive stock options granted to an optionee which, when combined with all other incentive stock options becoming exercisable for the first time in any calendar year that are held by that person, would have an aggregate fair market value in excess of $100,000 shall automatically be treated as non-qualified stock options.
The 1997 Plan provides that it may be amended, modified, suspended or terminated by our Board of Directors, or the compensation committee if so empowered, at any time; provided, however, that without the approval of the stockholders, there shall be (a) no increase in the total number of shares of stock covered by the 1997 Plan, (b) no change in the class of persons eligible to receive incentive stock options and (c) no extension of the period during which incentive stock options may be granted beyond the date which is ten years following the date the 1997 Plan was adopted. In any event, no such amendment, modification, suspension or termination may adversely affect the terms of any individual option previously granted without the consent of the affected optionee. As of the effectiveness of this offering, we expect that the 1997 Plan will terminate and that our Board of Directors and stockholders will have adopted the 2005 Stock Incentive Plan, or 2005 Plan. As a result, the authority to grant incentive stock options under the 1997 Plan will terminate, although the termination will not affect any options outstanding on the termination date and all such options will continue to remain outstanding and be governed by the 1997 Plan.
As of June 30, 2005, we had options to purchase                      shares of our common stock outstanding under our 1997 Plan and exercisable at a weighted average price of $           per share. As of June 30, 2005                     common shares had been issued upon exercise of options under the plan.
401(k) Savings Plan
Effective January 1, 2001, we adopted a tax-qualified employee savings and retirement plan, or 401(k) plan, that covers all of our employees. Pursuant to our 401(k) plan, participants may elect to reduce their current compensation, on a pre-tax basis, by any percentage the participant elects, up to statutorily prescribed annual limit, and have the amount of the reduction contributed to the 401(k) plan. The 401(k) plan also permits us, in our sole discretion, to make employer matching contributions equal to a specified percentage (as we determine) of the amount a participant has elected to contribute to the plan, and/or employer profit-sharing contributions equal to a specified percentage (as we determine) of an employee’s compensation. We do not currently make employer contributions to the 401(k) plan, but may determine to do so in the future.

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RELATIONSHIPS AND RELATED TRANSACTIONS
During the past three years, we have been a party to the following transactions with our executive officers, directors, holders of more than 5% of our voting securities, and their respective affiliates.
Stock Issuances and Acquisitions
Common Stock. In May 2003 we issued to David Barlow, our Chairman and Chief Executive Officer, an option to purchase                     shares of our common stock for $0.10 per share, the then fair market value of the common stock as determined by our Board of Directors. Mr. Barlow immediately exercised the option and purchased the common shares pursuant to a stock restriction agreement. The shares were paid for with a cash payment of $32,850 and a non-interest bearing promissory note in the amount of $295,650. On November 4, 2005, Mr. Barlow repaid this loan in full. See discussion in note 3 of our audited consolidated financial statements relating to the accounting treatment pertaining to the repayment of this loan. Mr. Barlow is entitled to piggyback registration rights for the vested shares, which he has waived for this offering. See “Registration Rights.”
Series A Preferred Stock. Between September 2001 and June 2002 we received advance subscriptions in anticipation of the issuance of our Series A Preferred Stock at a per share price of $70. A total of 43,862.14 shares of Series A Preferred Stock were issued on January 6, 2003 to a total of nine investors at the $70 per preferred share price, the date on which the Series A Preferred Stock were authorized for issuance under our certificate of organization. Between July 2002 and December 2003, we continued to raise money in connection with the issuance of our Series A Preferred Stock but at $54 per preferred share. Additional shares of Series A Preferred Stock were authorized for issuance on January 30, 2003 and during 2003 a total of 76,455 addition shares of Series A Preferred Stock were issued to a total of 34 investors at the $54 per preferred share price. David Barlow, our Chairman and Chief Executive Officer, was among the investors purchasing Series A Preferred Stock and he purchased 23,571.43 shares at the $70 per preferred share price and 25,724 shares at the $54 per preferred share price. His brother, Peter Barlow, purchased 555 shares of Series A Preferred Stock at $54 per preferred share. Jack and Gladys Barlow, David Barlow’s parents, purchased 429 and 370 shares of Series A Preferred Stock, respectively, at $54 per share. John Babich, our President and Chief Scientific Officer, purchased 641 Series A Preferred Stock at $54 per preferred share. Each share of the Series A Preferred Stock will automatically convert into 200 shares of Common Stock immediately prior to the closing of this offering. In addition, holders of Series A preferred stock have the election to receive cash or common stock valued at $ for all accrued and unpaid dividends on the Series A preferred stock.
Series B Preferred Stock. Between March 4, 2004 and June 30, 2004 we issued a total of 53,663 shares of our Series B Preferred Stock at a price of $132 per preferred share to a total of 33 investors. In connection with the issuance of Series B Preferred Stock, each investor was issued a warrant to purchase Common Stock in the Company, where the number of shares subject to such warrant equals 20% of the dollar amount invested by such purchaser. The warrants issued in this financing all have an exercise price of $0.66 per common share. Cerberus Partners, L.P. and Daniel Frank purchased 22,728 and 1,894 shares of Series B Preferred Stock, respectively, and received warrants to purchase                and                common shares, respectively. Mr. Frank’s sister and brother each purchased 189 shares of Series B Preferred Stock and each received a warrant to purchase                common shares. Daniel Frank is a member of our Board of Directors and Mr. Frank is a Managing Director of Cerberus Capital Management, L.P. Mr. Frank disclaims beneficial ownership of shares of Series B Preferred Stock owned by Cerberus Partners, L.P. and his family members. William C. Eckelman, a member of our Board of Directors, purchased 841 shares of Series B Preferred Stock and received a warrant to purchase  shares of Common Stock. Peter Barlow, David Barlow’s brother, purchased 228 shares of Series B Preferred Stock and received a warrant to purchase                shares of Common Stock. Each share of the Series B Preferred Stock will automatically convert into                     shares of Common Stock immediately prior to the closing of this offering. In addition,

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holders of Series B preferred stock have the election to receive cash or common stock valued at $                    for all accrued and unpaid dividends on the Series B preferred stock.
Series C Preferred Stock. Between March 29, 2005 and April 14, 2005 we issued a total of 141,590 shares of our Series C Preferred Stock at a price of $202 per preferred share to a total of 52 investors. Cerberus Partners, L.P. and Daniel Frank purchased 34,653 and 1,488 shares of Series C Preferred Stock, respectively. Mr. Frank’s brother, sister and mother each purchased 311, 75 and 247 shares of Series C Preferred Stock, respectively. Daniel Frank is a member of our Board of Directors and he is a partner in, and works for, Cerberus Partners, L.P. Mr. Frank disclaims beneficial ownership of shares of Series C Preferred Stock owned by Cerberus Partners, L.P. and his family members. Siemens Venture Capital GmbH purchased 14,851 shares of Series C Preferred Stock. Andrew Jay, a member of our Board of Directors, is an employee of Siemens, but disclaims beneficial ownership of the shares owned by Siemens. Jack and Gladys Barlow, David Barlow’s parents, purchased 495 and 148 shares of Series C Preferred Stock, respectively. Each shares of the Series C Preferred Stock will automatically convert into                     shares of Common Stock immediately prior to the closing of this offering. In addition, holders of Series C preferred stock have the election to receive cash or common stock valued at $                    for all accrued and unpaid dividends on the Series C preferred stock.
Loans Made to the Company by Affiliates
In June 2002, David Barlow loaned the Company $200,000, which was converted into shares of Series A Preferred Stock at the rate of $54 per preferred share in May 2003. The Company does not have any further indebtedness to Mr. Barlow.
Loans Made by the Company to Affiliates
In connection with the purchase of 3,285,000 shares of restricted common stock at $0.10 per share, David S. Barlow paid for the shares with a cash payment of $32,850 and a non-interest bearing promissory note in the amount of $295,650. On November 4, 2005, Mr. Barlow repaid this loan in full by paying to the Company $295,650 in cash.
Relationship with ATP Therapeutics, Inc.
ATP Therapeutics, a wholly-owned subsidiary of ours, was dissolved on October 26, 2005. We had previously owned 63.6% of the equity of this subsidiary with the balance of the equity owned by Eliezer Rapaport. As of October 6, 2005, we exchanged all the assets of ATP in exchange for the equity held by Dr. Rapaport. These assets consisted of written records and other items that we deemed were not material to our operations. The entity had been formed for the purpose of further researching and developing certain patent technology owned by Dr. Rapaport related to the therapeutic applications of adenosine 5-triphosphate. This technology was licensed by Dr. Rapaport to the subsidiary and, after it was later determined not to pursue these patents any further, the license agreement was terminated by Dr. Rapaport.
Relationship with Biostream Therapeutics, Inc.
We no longer conduct any activities through Biostream Therapeutics, Inc., our wholly-owned subsidiary formerly known as Zebra Pharmaceuticals, Inc.
Consulting Agreement with William C. Eckelman
On January 1, 2005 we entered into a Consulting Agreement with William C. Eckelman which expires on December 31, 2009, to serve as our Chief Scientific Advisor and as the Chairman of our Scientific Advisory Board for the compensation of $12,500 per month.

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Relationship with Peter Barlow and Foley & Lardner LLP
The law firm of Foley & Lardner LLP has provided legal services for the Company since February 1, 2005. From February 1, 2005 through June 30, 2005, we paid $415,779 in legal fees to Foley & Lardner. Peter Barlow is a partner of Foley & Lardner LLP and is the brother of David Barlow, our Chairman and Chief Executive Officer. Prior to February 1, 2005, the law firm of Epstein, Becker & Green P.C. provided legal services for the Company. Peter Barlow was a partner of Epstein, Becker & Green P.C. during this period.
Employment Agreements and Indemnification Agreements
We have entered into employment agreements with our executive officers, as described more fully in the section of this prospectus entitled “Management — Executive Employment Agreements.” In addition, our directors and officers are provided indemnification protections in our Restated Articles of Organization. See “Description of Capital Stock — Indemnification of Directors and Executive Officers and Limitation of Liability.”

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PRINCIPAL STOCKHOLDERS
The following table sets forth information regarding the beneficial ownership of our common stock as of September 30, 2005 by:
  •  each person that beneficially owns more than 5% of our outstanding common stock,
 
  •  each of our executive officers identified in the Summary Compensation Table above and our directors plus the director nominee who has agreed to join our Board of Directors at the closing of this offering, and
 
  •  all directors and executive officers as a group.
Beneficial ownership is determined in accordance with the rules of the Securities and Exchange Commission and includes voting or investment power with respect to the securities. Shares of common stock subject to options, warrants, or convertible securities that are exercisable or convertible, or exercisable or convertible within 60 days of September 30, 2005 are deemed to be outstanding and beneficially owned by the person holding such options, warrants, or convertible securities. Such shares, however, are not deemed outstanding for purposes of computing the percentage ownership of any other person.
Unless otherwise indicated and subject to community property laws where applicable, each of the stockholders has sole voting and investment power with respect to the shares beneficially owned. Unless otherwise noted in the footnotes, the address for each principal stockholder is in care of Molecular Insight Pharmaceuticals, Inc. at 160 Second Street, Cambridge, Massachusetts 02142.
                         
        Percent of Common Stock
    Number of Shares of   Beneficially Owned
    Common Stock    
Beneficial Owner   Beneficially Owned   Before Offering   After Offering
             
5% Stockholders
                       
Stephen Feinberg (1)
            13.7 %        
Ann Barlow
            6.2 %        
James Poitras
            6.6 %        
Named Executive Officers, Directors, and Director Nominee
                       
David S. Barlow
            13.8 %        
John Babich (2)
            3.1 %        
John McCray (3)
            1 %        
Nicholas Borys (4)
            *          
Bob Gallahue
            *          
William C. Eckelman (5)
            *          
Daniel Frank (6)
            *          
Kim Lamon (7)
            *          
Harry Stylli (8)
            *          
Andrew Jay
                     
Lionel Sterling (9)
            1.1 %        
Executive Officers, Directors, and
                       
Director Nominees as Group (11 persons)
            19.8 %        
 
Less than 1.0%
  (1) Includes                 shares of common stock and                  shares of common stock issuable upon the exercise of a warrant in all cases held in the name of Cerberus Partners, L.P. Mr. Feinberg has sole voting and investment power over all of the shares of common stock held by Cerberus Partners, L.P. and affiliates.
Footnotes continued on following page

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  (2) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005.
 
  (3) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005.
 
  (4) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005.
 
  (5) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005, and                 shares of shares of common stock issuable upon the exercise of a warrant.
 
  (6) Includes                 shares of common stock issuable upon the exercise of a warrant.
 
  (7) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005.
 
  (8) Includes                 shares of common stock issuable upon the exercise of options which are currently exercisable or which are exercisable within 60 days of September 30, 2005.
 
  (9) Includes                 shares of common stock issuable upon the exercise of a warrant.

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DESCRIPTION OF CAPITAL STOCK
General
The following description of our common stock and preferred stock and the relevant provisions of our Restated Articles of Organization and Amended and Restated Bylaws to be effective upon the closing of this offering are summaries and are qualified by reference to our Restated Articles of Organization and Amended and Restated Bylaws, copies of which have been filed with the Securities and Exchange Commission as exhibits to our registration statement, of which this prospectus forms a part.
Upon the closing of this offering, our authorized capital stock will consist of                     shares of common stock, par value $0.01 per share, and                     shares of preferred stock $0.01 par value per share.
Common Stock
As of June 30, 2005 there were                     shares of common stock outstanding held of record by 238 stockholders, after giving effect to the conversion of all outstanding shares of preferred stock upon the closing of this offering. Additionally, as of June 30, 2005, we have reserved an aggregate of                     shares of common stock for issuance in respect of options outstanding under our 1997 Plan,                     shares of common stock for issuance under our 2005 Equity Incentive Plan and                     shares of common stock for issuance upon exercise of warrants.
Holders of our common stock are entitled to one vote for each share of common stock held on all matters to be voted upon by stockholders and do not have cumulative voting rights. In accordance with Massachusetts law, the affirmative vote of a majority of the shares represented and voting at a duly held meeting at which a quorum is present shall be the act of the stockholders. Thus, directors are elected by a plurality of the votes of the shares present in person or by proxy at the meeting and entitled to vote in such election.
Shares of our common stock have no preemptive rights, no redemption or sinking fund provisions, and are not liable for further call or assessment. The holders of such common stock are entitled to receive dividends when and as declared by our Board of Directors out of funds legally available for dividends. We intend to pay to certain existing preferred stockholders a one-time cash dividend in an aggregate amount of $          . Following the completion of this offering and except for the one-time dividend payment to certain preferred holders, we do not anticipate paying any cash dividends on our capital stock for the foreseeable future.
Upon a liquidation, dissolution or winding-up of our Company, holders of common stock would be entitled to receive a pro rata distribution per share of any net assets available after the payment of all of our debts and other liabilities. The rights, preferences, and privileges of holders of common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of preferred stock which we may designate and issue in the future.
Preferred Stock
Upon the closing of this offering there will be no shares of preferred stock outstanding. Our Board of Directors will be authorized to issue up to                     shares of preferred stock from time to time in one or more series. Our Board also may fix the rights, preferences, privileges, and restrictions of those shares, including dividend rights, conversion rights, voting rights, redemption rights, terms of sinking funds, liquidation preferences and the number of shares constituting any series or the designation of the series. Any preferred stock terms selected by our Board of Directors could decrease the amount of earnings and assets available for distribution to holders of our common stock or adversely affect the rights and power, including voting rights, of the holders of our common stock without any further vote or action by the stockholders. The rights of holders of our common stock will be subject to, and

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may be adversely affected by, the rights of the holders of any preferred stock that may be issued by us in the future.
The issuance of preferred stock, while providing desired flexibility in connection with possible acquisitions and other corporate purposes, could adversely affect the voting power or other rights of the holders of common stock. The issuance of preferred stock could also have the effect of delaying or preventing a change in control or acquisition of our company or make removal of management more difficult. We have no present plans to issue any shares of preferred stock.
Warrants
As of June 30, 2005 we had the following warrants outstanding to purchase a total of                     shares of our common stock:
  •  warrant to purchase                     shares of our common stock at an exercise price of $          per share that will expire upon the closing of this offering;
 
  •  warrants to purchase                     shares of our common stock at an exercise price of $          per share that will expire upon the closing of this offering; and
 
  •  warrant to purchase                     shares of our common stock at an exercise price of $          per share that will expire upon the closing of this offering.
Stock Options
We have granted options to purchase shares of common stock under our 1997 Plan. As of June 30, 2005 we had options to purchase                      shares of our common stock outstanding and exercisable under our 1997 Plan at a weighted average price of $           per share. As of June 30, 2005, we had not granted any options under our 2005 Plan as such plan had not yet been established.
Registration Rights
Pursuant to the terms of a registration rights agreement, after this offering and the conversion of all shares of preferred stock into common stock, the holders of approximately                     shares of common stock will be entitled to certain rights with respect to the registration of such shares under the Securities Act of 1933. Under the terms of the registration rights agreement, if we propose to register any of our securities under the Securities Act after this initial public offering, either for our own account or for the account of other stockholders, the holders are entitled to notice of such registration and may include shares of their common stock in such registration. Additionally, the holders of currently outstanding Series C Preferred Stock are entitled to certain demand registration rights pursuant to which they may require us to file up to two registration statements under the Securities Act at our expense with respect to their shares of common stock, provided that the demand cannot be made within 180 days after the effective date of this offering and only once in any twelve month period. The holders of Series A and Series B Preferred Stock (together) are entitled to demand registration rights as well pursuant to which they may require us to file up to two registration statements under the Securities Act at our expense with respect to their shares of common stock, provided that the portion of the shares they request for registration equals at least 25% of the shares of common stock issuable upon the conversion of the Series A and Series B Preferred Stock (combined) and the gross proceeds from the sale are reasonably expected to exceed $30 million. The holders of Series A and Series B Preferred Stock are also limited to one demand in any twelve month period and may not make a demand until 180 days after the effective date of this offering. Further, if we become eligible to register the sale of our securities on Form S-3 under the Securities Act, the holders of Series A, Series B and Series C Preferred Stock are entitled to include their shares of common stock in such registration on Form S-3. All of the foregoing registration rights are subject to conditions and limitations, including the right of the underwriters of an offering to limit the number of

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shares included in such registration and our right to defer a registration for up to 45 days if it is in the best interest of the Company. In connection with any of the registrations described herein, we are obligated to indemnify the selling stockholders and bear all registration fees, costs and expenses.
Pursuant to a Principal Stockholder Agreement previously entered into by the Company with each of Keith Greenfield, David Elmaleh, John Babich, Greg Shoukimas, Enrico Petrillo and John Connors, each of these holders of our common stock is entitled to piggyback registration rights in this offering and we must use our best efforts to include any shares they request be included in this offering, subject to underwriter cutbacks.
Pursuant to the employment agreements between the Company and each of Messrs. Barlow, Babich, McCray and Borys, each of Messrs. Barlow, Babich, McCray and Borys are entitled to piggyback registration rights on the same basis as the most favorable provisions received by any third party from the Company. Accordingly, Messrs. Barlow, Babich, McCray and Borys have piggyback registration rights equivalent to those granted under the Principal Stockholder Agreements described above. Each of Messrs. Barlow, Babich, McCray and Borys have waived their piggyback registration rights in connection with this offering.
Indemnification of Directors and Executive Officers and Limitation of Liability
We are a Massachusetts corporation. Section 2.02 of the Massachusetts Business Corporation Act, or MBCA, permits a corporation to eliminate or limit the personal liability of a director for monetary damages for violations of the director’s fiduciary duty, except for (i) any breach of the director’s duty of loyalty to the corporation or its stockholders, (ii) acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) for authorizing unauthorized distributions and for making loans to directors, officers and certain stockholders pursuant to Section 6.40 of the MBCA or (iv) any transaction from which a director derived an improper personal benefit.
Section 8 of the MBCA provides that a corporation may indemnify directors, officers, employees and other agents and persons who serve at its request as directors, officers, employees or agents of another organization or who serve at its request in any capacity with respect to any employee benefit plan, to the extent specified or authorized by the articles of organization, any bylaw adopted by the stockholders or a vote adopted by the holders of a majority of the shares of stock entitled to vote on the election of directors. Such indemnification may include payment by the corporation of expenses incurred in defending a civil or criminal action or proceeding in advance of the final disposition of such action or proceeding, upon receipt of any undertaking by the person indemnified to repay such payment if he shall be adjudicated to be not entitled to indemnification under Section 8 which undertaking may be accepted without reference to the financial ability of such person to make repayment. Any such indemnification may be provided although the person to be indemnified is no longer an officer, director, employee or agent of the corporation or of such other organization or no longer serves with respect to such employee benefit plan. No indemnification shall be provided, however, for any person with respect to any matter where there is a court determination that such person, in the matter in question, did not act in good faith in the reasonable belief that his action was in the best interest of the corporation or, to the extent that the matter relates to service with respect to an employee benefit plan, that such person did not act in the best interest of the participants or beneficiaries of such employee benefit plan.
In addition to the indemnification granted to officers and directors under the MBCA, Article VI of our Restated Articles of Organization provides that each person who was or is made a party or is threatened to be made a party to or is otherwise involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he or she is or was a director or an officer of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other

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enterprise, including service with respect to an employee benefit plan, whether the basis of such proceeding is alleged action in an official capacity as a director, officer, employee or agent or in any other capacity while serving as a director, officer, employee or agent, shall be indemnified and held harmless by the corporation to the fullest extent authorized by the MBCA, as the same exists or may hereafter be amended against all expense, liability and loss (including attorneys’ fees, judgments, fines, ERISA excise taxes or penalties and amounts paid in settlement) reasonably incurred or suffered by such indemnitee in connection therewith.
The right to indemnification conferred in our Restated Articles of Organization includes, in the case of a director or officer at the level of vice president or above, and in the case of any other officer or any employee may include (in the discretion of the Board of Directors), the right to be paid by the Company the expenses incurred in defending any such proceeding in advance of its final disposition. The rights to indemnification and to the advancement of expenses conferred in our Restated Articles of Organization continue as to an indemnitee who has ceased to be a director, officer, employee or agent and inure to the benefit of the indemnitee’s heirs, executors and administrators. We believe that these provisions are necessary to attract and retain qualified persons as directors and executive officers. Additionally, the Amended and Restated Bylaws permit us to secure insurance on behalf of any officer, director, employee, or other agent for any liability arising out of his or her actions in connection with their services to us, regardless of whether our articles of incorporation or bylaws permit such indemnification. We have obtained such insurance.
To the extent that indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling the Company pursuant to the foregoing provisions, the Securities Exchange Commission has expressed its opinion that such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.
There is pending litigation involving certain of our directors and officers as to which indemnification had been provided by us pursuant to our bylaws, and will continue to be provided pursuant to our Restated Articles of Organization. See Section “Business — Legal Proceedings” for a further description. There is no other pending litigation or proceeding involving our directors, officers, employees or agents pending for which indemnification is sought, nor are we aware of any pending or threatened litigation that may result in claims for indemnification by any director, officer, employee or other agent.
Potential Anti-Takeover Effect of Provisions of our Articles of Organization and Bylaws
Our Restated Articles of Organization and Amended and Restated Bylaws include a number of provisions that may have the effect of deterring hostile takeovers or delaying or preventing changes in our control or our management, including, but not limited to, the following:
•  Our Board of Directors can issue up to                      shares of preferred stock, with any rights or preferences, including the right to approve or not approve an acquisition or other change in control.
 
•  Our Amended and Restated Bylaws provide that stockholders seeking to present proposals before a meeting of stockholders or to nominate candidates for election as directors at a meeting of stockholders must provide timely notice in writing and also specify requirements as to the form and content of a stockholder’s notice. These provisions may delay or preclude stockholders from bringing matters before a meeting of stockholders or from making nominations for directors at a meeting of stockholders, which could delay or deter takeover attempts or changes in management.
 
•  Our Amended and Restated Bylaws provide that special meetings of the stockholders may be called only by the President or the Board of Directors or by the person designated in the written request of the holders of not less than      % of all shares entitled to vote at the meeting.
 
•  Our Board of Directors will be divided into three classes following this offering, with each class serving a staggered three-year term. The classification of our Board of Directors will have the effect

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of requiring at least two annual stockholder meetings, instead of one, to replace a majority of our authorized directors, which could have the effect of delaying or preventing a change in our control or management.
 
•  Our Restated Articles of Organization provide that, subject to the rights of the holders of any outstanding series of preferred stock, all vacancies, including newly created directorships, may, except as otherwise required by law, be filled by the affirmative vote of a majority of directors then in office, even if less than a quorum. In addition, our Restated Articles of Organization provide that our Board of Directors may fix the number of directors by resolution.
 
•  Our Restated Articles of Organization provide that, following this offering, our directors may not be removed without cause.
 
•  Our Restated Articles of Organization do not provide for cumulative voting for directors. The absence of cumulative voting may make it more difficult for stockholders who own an aggregate of less than a majority of our stock to elect any directors to our Board.

These and other provisions contained in our Restated Articles of Organization and Amended and Restated Bylaws could delay or discourage transactions involving an actual or potential change in control of us or our management, including transactions in which our stockholders might otherwise receive a premium for their shares over then current prices, and may limit the ability of stockholders to remove our current management or approve transactions that our stockholders may deem to be in their best interests and, therefore, could adversely affect the price of our common stock.
Nasdaq Trading
We have applied to have the shares of our common stock approved for quotations on the Nasdaq National Market System under the symbol “MIPI.”
Transfer Agent and Registrar
The transfer agent and registrar for our common stock is American Stock Transfer and Trust Company. The transfer agent’s address is 59 Maiden Lane, New York, NY 10038 and its telephone number is (718) 921-8201.

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SHARES ELIGIBLE FOR FUTURE SALE
Prior to this offering, there was no market for our common stock. Based on shares outstanding as of June 30, 2005, upon completion of this offering, we will have                      shares of common stock outstanding, assuming no exercise of the underwriters’ over-allotment option and no exercise of options outstanding. Of these shares, the                      shares sold in this offering will be freely transferable without restrictions or further registration under the Securities Act unless such shares are purchased by our affiliates, as that term is defined in Rule 144 and the Securities Act. No predictions can be made as to the effect, if any, that market sales of shares of common stock from time to time, or the availability of shares for future sale, may have on the market price for our common stock. Sales of substantial amounts of common stock, or the perception that such sales could occur, could adversely affect prevailing market prices for our common stock and could impair our future ability to obtain capital through an offering of equity securities.
Sale of Restricted Shares
The remaining                      shares of common stock held by our existing stockholders upon completion of the offering will be “restricted securities,” as that phrase is defined in Rule 144, and may not be resold in the absence of registration under the Securities Act or pursuant to an exemption from such registration pursuant to exemptions provided by Rules 144 or 701 under the Securities Act. These rules are summarized below. Of these restricted shares,                      shares will be available for resale in the public market in reliance on Rule 144(k),           % of which are restricted by the terms of the lock-up agreements described below. The remaining                      shares become eligible for resale in the public market at various dates thereafter,           % of which are restricted by the terms of the lock-up agreements.
In general, under Rule 144 as currently in effect, a person who has beneficially owned shares for at least one year, including an “affiliate” of the Company, as that term is defined in the Securities Act, is entitled to sell, within any three-month period, a number of shares that does not exceed the greater of:
  •  one percent of the then outstanding shares of our common stock (approximately                      shares immediately following the offering); or
 
  •  the average weekly trading volume during the four calendar weeks preceding filing of notice of such sale.
Sales under Rule 144 are also subject to certain provisions pertaining to the manner of the sale, notice requirements and the availability of current public information about us. A stockholder who is deemed not to have been an “affiliate” of ours at any time during the 90 days preceding a sale, and who has beneficially owned restricted shares for at least two years, would be entitled to sell such shares under Rule 144(k) without regard to the volume limitations, manner of sale provisions or public information requirements of Rule 144.
Rule 701 provides that the shares of common stock acquired upon the exercise of currently outstanding options may be resold, to the extent not restricted by the terms of the lock-up agreements, by persons, other than affiliates, beginning 90 days after the date of this prospectus, subject only to the manner of sale provisions of Rule 144, and by affiliates under Rule 144 without compliance with its one year minimum holding period, subject to certain limitations. As of June 30, 2005, we had options to purchase                      shares of our common stock outstanding and exercisable at a weighted average price of $           per share. On                     , 2005, our Board of Directors terminated our 1997 Plan and adopted our 2005 Plan, under which an additional                      shares of common stock are reserved for issuance. We intend to register the shares of common stock issuable or reserved for issuance under these stock option plans within 90 days after the date of this prospectus.
          % of our affiliates have agreed to further restrict their shares by entering into lock-up arrangements as discussed below.

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After the 180-day period following the closing of this offering as it may be extended, the holders of                      shares of common stock that will be outstanding after this offering are entitled to require us to register the sale of their shares under the Securities Act. See “Description of Capital Stock — Registration Rights.”
Lock-up Arrangements
Except for sales of common stock to the underwriters in accordance with the terms of the underwriting agreement, we, all of our executive officers and directors, and certain other security holders, holding in the aggregate approximately           % of our outstanding common stock, have agreed not to sell or otherwise dispose of any shares of common stock not registered in this offering for a period of 180 days after the date of this prospectus, subject to extensions in certain cases, without the prior written consent of Piper Jaffray, on behalf of the underwriters. Upon the expiration of these lock-up agreements, additional shares will be available for sale in the public market. The agreements provide exceptions for (1) our sales in connection with the exercise of options granted and the granting of options to purchase up to an additional                     shares under the our existing stock option plans and (2) certain other exceptions.

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UNDERWRITING
The underwriters named below have agreed to buy, subject to the terms of the purchase agreement, the number of shares listed opposite their names below. Piper Jaffray & Co. and SG Cowen & Co., LLC are acting as joint book-running managers for this offering and, together with Oppenheimer & Co. Inc. and Roth Capital Partners LLC, are acting as representatives of the underwriters. The underwriters are committed to purchase and pay for all of the shares if any are purchased, other than those shares covered by the over-allotment option described below.
           
    Number of
Underwriters   Shares
     
Piper Jaffray & Co.
       
SG Cowen & Co., LLC
       
Oppenheimer & Co. Inc. 
       
Roth Capital Partners, LLC
       
       
 
Total
       
       
The underwriters have advised us that they propose to offer the shares to the public at $           per share. The underwriters propose to offer the shares to certain dealers at the same price less a concession of not more than $          per share. The underwriters may allow and the dealers may reallow a concession of not more than $          per share on sales to certain other brokers and dealers. After the offering, these figures may be changed by the underwriters.
At our request, the underwriters have reserved for sale at the initial public offering price up to                     shares of common stock to directors, employees and person have business relationships with or otherwise related to Molecular Insight Pharmaceuticals. The number of shares of common stock available for sale to the general public will be reduced to the extent that such individuals purchase all or a portion of these reserved shares. Any reserved shares which are not purchased will be offered by the underwriters to the general public on the same basis as the shares of common stock offered hereby.
We have granted to the underwriters an option to purchase up to an additional                     shares of common stock from us at the same price to the public, and with the same underwriting discount, as set forth in the table above. The underwriters may exercise this option any time during the 30-day period after the date of this prospectus, but only to cover over-allotments, if any. To the extent the underwriters exercise the option, each underwriter will become obligated, subject to certain conditions, to purchase approximately the same percentage of the additional shares as it was obligated to purchase under the purchase agreement.
We estimate that the total fees and expenses payable by us, excluding underwriting discounts and commissions, will be approximately $          . The following table shows the underwriting fees to be paid to the underwriters in connection with this offering. These amounts are shown assuming both no exercise and full exercise of the over-allotment option.
                 
    No Exercise   Full Exercise
         
Per share
  $       $    
Total
  $       $    
We have agreed to indemnify the underwriters against certain liabilities, including civil liabilities under the Securities Act, or to contribute to payments that the underwriters may be required to make in respect of those liabilities.
Except for sales of common stock to the underwriters in accordance with the terms of the underwriting agreement, we, all of our executive officers and directors, and certain other security holders, holding in the aggregate approximately           % of our outstanding common stock, have agreed not to sell or otherwise dispose of any shares of common stock not registered in this offering for a

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period of 180 days after the date of this prospectus, subject to extensions in certain cases, without the prior written consent of Piper Jaffray, on behalf of the underwriters. Upon the expiration of these lock-up agreements, additional shares will be available for sale in the public market. The agreements provide exceptions for (1) our sales in connection with the exercise of options granted and the granting of options to purchase up to an additional                     shares under the our existing stock option plans and (2) certain other exceptions.
Prior to the offering, there has been no established trading market for the common stock. The initial public offering price for the shares of common stock offered by this prospectus was negotiated by us and the underwriters. The factors considered in determining the initial public offering price include the history of and the prospects for the industry in which we compete, our past and present operations, our historical results of operations, our prospects for future earnings, the recent market prices of securities of generally comparable companies and the general condition of the securities markets at the time of the offering and other relevant factors. There can be no assurance that the initial public offering price of the common stock will correspond to the price at which the common stock will trade in the public market subsequent to this offering or that an active public market for the common stock will develop and continue after this offering.
To facilitate the offering, the underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the common stock during and after the offering. Specifically, the underwriters may over-allot or otherwise create a short position in the common stock for their own account by selling more shares of common stock than have been sold to them by us. The underwriters may elect to cover any such short position by purchasing shares of common stock in the open market or by exercising the over-allotment option granted to the underwriters. In addition, the underwriters may stabilize or maintain the price of the common stock by bidding for or purchasing shares of common stock in the open market and may impose penalty bids. If penalty bids are imposed, selling concessions allowed to syndicate members or other broker-dealers participating in the offering are reclaimed if shares of common stock previously distributed in the offering are repurchased, whether in connection with stabilization transactions or otherwise. The effect of these transactions may be to stabilize or maintain the market price of the common stock at a level above that which might otherwise prevail in the open market. The imposition of a penalty bid may also effect the price of the common stock to the extent that it discourages resales of the common stock. The magnitude or effect of any stabilization or other transactions is uncertain.
These transactions may be effected on the Nasdaq National Market or otherwise and, if commenced, may be discontinued at any time. In connection with this offering, some underwriters (and selling group members) may also engage in passive market making transactions in the common stock on the Nasdaq National Market. Passive market making consists of displaying bids on the Nasdaq National Market limited by the prices of independent market makers and effecting purchases limited by those prices in response to order flow. Rule 103 of Regulation M promulgated by the SEC limits the amount of net purchases that each passive market maker may make and the displayed size of each bid. Passive market making may stabilize the market price of the common stock at a level above that which might otherwise prevail in the open market and, if commenced, may be discontinued at any time.
From time to time in the ordinary course of their respective business, certain of the underwriters and their affiliates have engaged in and may in the future engage in commercial banking or investment banking transactions with us and our affiliates.

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LEGAL MATTERS
The validity of the shares of common stock issued in this offering will be passed upon for us by the law firm of Foley & Lardner LLP, Boston, Massachusetts. Certain legal matters in connection with this offering will be passed upon for the underwriters by the law firm of Willkie Farr & Gallagher LLP, New York City, New York.
EXPERTS
Our consolidated financial statements as of December 31, 2003 and 2004 and for each of the three years in the period ended December 31, 2004 included in this prospectus have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report appearing herein and have been so included in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.
WHERE YOU CAN FIND MORE INFORMATION
We have filed a registration statement on Form S-1 with the SEC for the stock we are offering by this prospectus. This prospectus does not include all of the information contained in the registration statement. You should refer to the registration statement and its exhibits for additional information. Whenever we make reference in this prospectus to any of our contracts, agreements or other documents, the references are not necessarily complete and you should refer to the exhibits attached to the registration statement for copies of the actual contract, agreement or other document. When we complete this offering, we will also be required to file annual, quarterly and special reports, proxy statements and other information with the SEC.
You can read our SEC filings, including the registration statement, over the Internet at the SEC’s web site at www.sec.gov. You may also read and copy any document we file with the SEC at its Public Reference Room at 100 F Street, N.E., Room 1580, Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the operation of the public reference facilities. Our SEC filings are also available at the office of the Nasdaq National Market. For further information on obtaining copies of our public filings at the Nasdaq National Market, you should call (212) 656-5060. Our Internet website is: www.molecularinsight.com. Information on our Internet website does not constitute a part of this prospectus.

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MOLECULAR INSIGHT PHARMACEUTICALS, INC. AND SUBSIDIARIES
(A Development Stage Company)
TABLE OF CONTENTS
         
    F-2  
Consolidated Financial Statements:
       
    F-3  
    F-4  
    F-5  
    F-8  
    F-10  

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors and Stockholders of Molecular Insight Pharmaceuticals, Inc.
Cambridge, Massachusetts
We have audited the accompanying consolidated balance sheets of Molecular Insight Pharmaceuticals, Inc. (a development stage company) and subsidiaries (the “Company”) as of December 31, 2003 and 2004, and the related consolidated statements of operations, redeemable convertible preferred stock and stockholders’ (deficit) equity, and cash flows for each of the three years in the period ended December 31, 2004 and the consolidated statements of redeemable convertible preferred stock and stockholders’ (deficit) equity for the period from January 10, 1997 (date of inception) through December 31, 2004. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.
In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2003 and 2004, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2004, in conformity with accounting principles generally accepted in the United States of America.
/s/ Deloitte & Touche LLP
Boston, Massachusetts
November 7, 2005

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED BALANCE SHEETS
                               
    As of December 31,    
        As of June 30,
    2003   2004   2005
             
            (Unaudited)
ASSETS
Current assets:
                       
 
Cash and cash equivalents
  $ 1,710,500     $ 846,154     $ 21,152,694  
 
Accounts receivable — research and development grants
    49,378       86,465       125,308  
 
Prepaid expenses and other current assets
    76,119       254,543       243,813  
                   
     
Total current assets
    1,835,997       1,187,162       21,521,815  
Property and equipment — net
    383,830       378,803       388,286  
Deposits
    12,291       6,891       1,891  
                   
Total assets
  $ 2,232,118     $ 1,572,856     $ 21,911,992  
                   
 
LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK
AND STOCKHOLDERS’ DEFICIT
Current liabilities:
                       
 
Notes payable
  $     $ 851,414     $ 22,864  
 
Capital lease obligations
    5,101              
 
Advances received from stockholders for stock subscriptions
    2,118,800              
 
Accounts payable
    850,916       1,611,391       839,903  
 
Accrued expenses
    249,812       1,098,130       1,204,471  
 
Accrued expenses — related parties
    320,266       177,996       231,464  
 
Deferred revenue — government grants
          14,233       74,976  
                   
   
Total current liabilities
    3,544,895       3,753,164       2,373,678  
                   
Deferred rent — less current portion
    157,987       112,847       90,277  
                   
Commitments and contingencies (Note 10) 
                       
Redeemable convertible preferred stock, $0.01 par value — at carrying value, including accrued dividends; authorized 211,000 shares at December 31, 2003 and 2004 and 359,515 (unaudited) shares at June 30, 2005; 120,317, 173,980, 315,570 (unaudited) shares issued and outstanding at December 31, 2003, 2004 and June 30, 2005, respectively (liquidation preference and redemption value of approximately $10,647,000 and $7,760,000 at December 31, 2003, $21,406,000 and $15,861,000 at December 31, 2004, and $52,596,000 (unaudited) and $45,323,000 (unaudited) at June 30, 2005)
    7,552,080       15,538,074       43,808,844  
                   
Stockholders’ deficit
                       
 
Common stock, $0.01 par value; authorized, 78,000,000 shares at December 31, 2003 and 2004 and 115,000,000 (unaudited) shares at June 30, 2005; issued and outstanding, 23,779,444, 25,959,142 and 26,466,283 (unaudited) shares at December 31, 2003, 2004 and June 30, 2005, respectively
    237,794       259,591       264,662  
 
Additional paid-in capital
    22,480,605       22,381,484       23,039,918  
 
Note receivable from officer/stockholder
    (295,650 )     (295,650 )     (295,650 )
 
Deferred stock-based compensation
          (415,658 )     (1,130,187 )
 
Deficit accumulated during the development stage
    (31,445,593 )     (39,760,996 )     (46,239,550 )
                   
   
Total stockholders’ deficit
    (9,022,844 )     (17,831,229 )     (24,360,807 )
                   
Total liabilities, redeemable convertible preferred stock and stockholders’ deficit
  $ 2,232,118     $ 1,572,856     $ 21,911,992  
                   
See notes to consolidated financial statements.

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF OPERATIONS
                                                     
                    Period From
        Six Months Ended   January 10, 1997
    Year Ended December 31,   June 30,   (Date of Inception)
            to
    2002   2003   2004   2004   2005   June 30, 2005
                         
                    (Unaudited)
                (Unaudited)    
Revenue — research and development grants
  $ 624,161     $ 723,475     $ 569,273     $ 247,895     $ 426,962     $ 3,285,403  
Operating expenses:
                                               
 
Research and development
    2,217,003       2,700,948       5,298,317       1,946,766       3,892,651       23,033,767  
 
Research and development — related parties
    99,602       73,855       83,156       41,578       96,876       749,739  
 
General and administrative
    1,333,712       1,157,559       3,108,640       1,458,109       2,638,113       15,271,627  
 
General and administrative — related parties
    228,248       108,449       411,060       66,920       404,108       1,151,865  
 
Amortization of licensed patent rights
    3,798,329                               9,767,130  
                                     
   
Total operating expenses
    7,676,894       4,040,811       8,901,173       3,513,373       7,031,748       49,974,128  
                                     
Loss from operations
    (7,052,733 )     (3,317,336 )     (8,331,900 )     (3,265,478 )     (6,604,786 )     (46,688,725 )
Other (expense) income:
                                               
 
Interest income
    3,367       1,261       19,601       11,736       133,019       301,304  
 
Interest expense
    (5,540 )     (3,052 )     (3,104 )     (1,141 )     (6,787 )     (28,263 )
 
Interest expense–related parties
    (28,600 )     (28,600 )                       (57,200 )
 
Management fee income–related party
                                  233,334  
                                     
   
Total other (expense) income, net
    (30,773 )     (30,391 )     16,497       10,595       126,232       449,175  
                                     
Net loss
    (7,083,506 )     (3,347,727 )     (8,315,403 )     (3,254,883 )     (6,478,554 )     (46,239,550 )
Redeemable convertible preferred stock dividends and accretion of issuance costs
          (612,895 )     (1,312,132 )     (638,132 )     (1,710,267 )     (3,635,294 )
                                     
Net loss attributable to common stockholders
  $ (7,083,506 )   $ (3,960,622 )   $ (9,627,535 )   $ (3,893,015 )   $ (8,188,821 )   $ (49,874,844 )
                                     
Net loss per share attributable to common stockholders:
                                               
Basic and diluted net loss per share attributable to common stockholders
  $ (0.63 )   $ (0.19 )   $ (0.43 )   $ (0.18 )   $ (0.33 )        
                                     
Weighted average shares used to compute basic and diluted net loss per share attributable to common stockholders
    11,274,886       21,089,850       22,640,633       21,981,086       25,039,069          
                                     
See notes to consolidated financial statements.

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ (DEFICIT) EQUITY
                                                                                         
            Stockholders’ (Deficit) Equity
         
    Redeemable Convertible        
    Preferred Stock,   Common Stock               Deficit    
    $0.01 Par Value   $0.01 Par Value       Treasury Stock   Note       Accumulated    
            Additional       Receivable   Deferred Stock–   During the   Total
    Number of   Carrying   Number of       Paid-In   Number of       from   Based   Development   Stockholders’
    Shares   Value   Shares   Par Value   Capital   Shares   Cost   Stockholder   Compensation   Stage   (Deficit) Equity
                                             
Inception of Company,
January 10, 1997
                                                                                       
Issuance of common stock in 1997
        $       2,996,800     $ 29,968     $ 528,286           $     $     $ (546,000 )   $     $ 12,254  
Issuance of common stock for services in 1997
                1,846,800       18,468       1,672,982                         (1,673,200 )           18,250  
Issuance of common stock in 1998
                792,690       7,926       1,280,195                                     1,288,121  
Issuance of common stock in 1999
                650,000       6,500       1,618,500                                     1,625,000  
Repurchase of common stock in 1999
                                  (210,000 )     (50,400 )                       (50,400 )
Issuance of common stock and warrants, net of $663,406 of issuance costs in 2000
                2,258,200       22,582       5,230,512                                     5,253,094  
Issuance of common stock for services in 2000
                5,100       51       12,699                                     12,750  
Purchase of Zebra Pharmaceuticals, Inc. in 2000
                2,097,154       20,972       9,941,643                                     9,962,615  
Retirement of treasury stock in 2000
                (210,000 )     (2,100 )     (48,300 )     210,000       50,400                          
Stock-based compensation from inception to December 31, 2002
                            2,660,201                         2,078,399             4,738,600  
Net loss from inception to December 31, 2002
                                                          (21,014,360 )     (21,014,360 )
                                                                   
Balance, January 1, 2002
                10,436,744       104,367       22,896,718                         (140,801 )     (21,014,360 )     1,845,924  
Issuance of common stock
                10,057,700       100,577       (100,577 )                                    
Stock-based compensation
                            (3,273 )                                   (3,273 )
Amortization of stock-based compensation
                                                    401             401  
Unamortized deferred compensation related to cancelled stock options
                            (70,991 )                       70,991              
Warrants issued in connection with notes payable to stockholders
                            2,200                                     2,200  
Net loss
                                                          (7,083,506 )     (7,083,506 )
                                                                   
Balance, December 31, 2002
                20,494,444       204,944       22,724,077                         (69,409 )     (28,097,866 )     (5,238,254 )
 
                                                                            (Continued)

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ (DEFICIT) EQUITY
                                                                                         
            Stockholders’ (Deficit) Equity
         
    Redeemable Convertible        
    Preferred Stock,   Common Stock               Deficit    
    $0.01 Par Value   $0.01 Par Value       Treasury Stock   Note       Accumulated    
            Additional       Receivable   Deferred Stock–   During the   Total
    Number of   Carrying   Number of       Paid-In   Number of       from   Based   Development   Stockholders’
    Shares   Value   Shares   Par Value   Capital   Shares   Cost   Stockholder   Compensation   Stage   (Deficit) Equity
                                             
Issuance of Series A redeemable convertible preferred stock, net of $259,843 of issuance costs
    94,697     $ 5,555,610                                                        
Issuance of Series A redeemable convertible preferred stock as stock-based compensation
    6,476       349,704                                                        
Conversion of accounts payable, accrued expenses, and notes into Series A redeemable convertible preferred stock
    19,144       1,033,871                                                        
Preferred stock dividends
          560,926                   (560,926 )                                   (560,926 )
Accretion of issuance costs
          51,969                   (51,969 )                                   (51,969 )
Issuance of restricted common stock
                3,285,000       32,850       295,650                   (295,650 )                 32,850  
Stock-based compensation for non- employee awards
                            73,773                                     73,773  
Stock-based compensation
                                                    959             959  
Unamortized deferred compensation related to cancelled stock options
                                                    68,450             68,450  
Net loss
                                                          (3,347,727 )     (3,347,727 )
                                                                   
Balance, December 31, 2003
    120,317       7,552,080       23,779,444       237,794       22,480,605                   (295,650 )           (31,445,593 )     (9,022,844 )
Issuance of common stock upon exercise of stock options
                1,975,994       19,760       174,989                                     194,749  
Issuance of common stock upon exercise of warrants
                203,704       2,037       52,963                                     55,000  
Issuance of Series B redeemable convertible preferred stock and common stock warrants, net of $198,514 of issuance costs
    52,670       6,542,786                   211,000                                     211,000  
Conversion of accounts payable into Series B redeemable convertible preferred stock
    993       131,076                                                        
 
                                                                            (Continued)

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ (DEFICIT) EQUITY
                                                                                         
            Stockholders’ (Deficit) Equity
         
    Redeemable Convertible        
    Preferred Stock,   Common Stock               Deficit    
    $0.01 Par Value   $0.01 Par Value       Treasury Stock   Note       Accumulated    
            Additional       Receivable   Deferred Stock–   During the   Total
    Number of   Carrying   Number of       Paid-In   Number of       from   Based   Development   Stockholders’
    Shares   Value   Shares   Par Value   Capital   Shares   Cost   Stockholder   Compensation   Stage   (Deficit) Equity
                                             
Stock-based compensation for non- employee awards
                            45,509                                     45,509  
Preferred stock dividends
          1,016,920                   (1,016,920 )                                   (1,016,920 )
Accretion of issuance costs and warrants
          295,212                   (295,212 )                                   (295,212 )
Deferred stock-based compensation
                            728,550                         (728,550 )            
Amortization of deferred stock-based compensation
                                                    312,892             312,892  
Net loss
                                                          (8,315,403 )     (8,315,403 )
                                                                   
Balance, December 31, 2004
    173,980       15,538,074       25,959,142       259,591       22,381,484                   (295,650 )     (415,658 )     (39,760,996 )     (17,831,229 )
Exercise of stock options and warrants (unaudited)
                507,141       5,071       45,642                                     50,713  
Issuance of Series C redeemable convertible preferred stock, net of $1,106,800 of issuance costs (unaudited)
    141,590       27,470,581                   24,000                                     24,000  
Series B warrant modification (unaudited)
          (560,000 )                 560,000                                     560,000  
Preferred stock dividends (unaudited)
          1,168,592                   (1,168,592 )                                   (1,168,592 )
Accretion of issuance costs and warrants (unaudited)
          191,597                   (191,597 )                                   (191,597 )
Stock-based compensation for non- employee awards (unaudited)
                            38,481                                     38,481  
Deferred stock-based compensation (unaudited)
                            1,350,500                         (1,350,500 )            
Amortization of deferred stock-based compensation (unaudited)
                                                    635,971             635,971  
Net loss (unaudited)
                                                          (6,478,554 )     (6,478,554 )
                                                                   
Balance, June 30, 2005 (unaudited)
    315,570     $ 43,808,844       26,466,283     $ 264,662     $ 23,039,918                 $ (295,650 )   $ (1,130,187 )   $ (46,239,550 )   $ (24,360,807 )
                                                                   
 
                                                                            (Concluded)
See notes to consolidated financial statements.

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF CASH FLOWS
                                                     
                        Cumulative for the
            Period From
    Year Ended December 31,   Six Months Ended June 30,   January 10, 1997
            (Date of Inception)
    2002   2003   2004   2004   2005   to June 30, 2005
                         
                (Unaudited)   (Unaudited)   (Unaudited)
Cash flows from operating activities:
                                               
Net loss
  $ (7,083,506 )   $ (3,347,727 )   $ (8,315,403 )   $ (3,254,883 )   $ (6,478,554 )   $ (46,239,550 )
Adjustments to reconcile net loss to cash used in operating activities, net of acquisition
                                               
 
Noncash interest expense on promissory notes payable to stockholders
    1,100       28,600                         29,700  
 
Depreciation and amortization
    3,927,967       92,712       106,206       52,574       61,404       10,597,223  
 
Stock-based compensation expense (credit)
    (2,872 )     492,886       358,403       260,295       674,452       6,302,723  
 
Noncash rent
                (45,140 )     (22,570 )     (22,570 )     (67,710 )
 
Other
                                  4,787  
 
Changes in assets and liabilities, net of the acquisition of Zebra Pharmaceuticals, Inc.:
                                               
   
Accounts receivable
    (5,315 )     (13,014 )     (37,087 )     40,266       (38,843 )     (63,161 )
   
Prepaid expenses
    15,940       (4,356 )     (55,771 )     (117,792 )     10,730       (58,463 )
   
Deposits
    1,600             5,400             5,000       (1,891 )
   
Accounts payable
    257,222       (119,233 )     992,914       (77,603 )     (754,203 )     709,167  
   
Accrued expenses and other
    373,278       (219,743 )     951,180       784,883       106,341       1,264,313  
   
Accounts payable and accrued expenses-related parties
    230,169       63,600       (142,270 )     (243,848 )     53,468       338,131  
   
Deferred revenue — government grants
                14,233             60,743       74,976  
                                     
 
Net cash used in operating activities
    (2,284,417 )     (3,026,275 )     (6,167,335 )     (2,578,678 )     (6,322,032 )     (27,109,775 )
                                     
Cash flows from investing activities:
                                               
 
Purchase of property and equipment
    (24,964 )     (26,148 )     (202,542 )     (149,326 )     (88,172 )     (864,675 )
 
Collection of advance and note receivable for stockholder
                                  135,500  
 
Net cash received on acquisition of Zebra Pharmaceuticals, Inc. 
                                  171,560  
                                     
 
Net cash used in investing activities
    (24,964 )     (26,148 )     (202,542 )     (149,326 )     (88,172 )     (557,615 )
                                     
Cash flows from financing activities:
                                               
 
Advances received for stock subscriptions — net
    571,579       2,072,511                         5,314,619  
 
Proceeds from issuance of notes payable to stockholders and issuance of warrants
    550,000             700,000             375,000       1,645,000  
 
Payment on notes payable
                (120,392 )     (5,721 )     (128,550 )     (248,942 )
 
Proceeds from sale of Series A redeemable convertible preferred stock — net of issuance costs
          2,663,207                         2,663,207  
 
Proceeds from sale of Series B redeemable convertible preferred stock — net of issuance costs
                4,681,275       4,681,275             4,681,275  
 
Proceeds from sale of Series C redeemable convertible preferred stock — net of issuance costs
                            26,419,581       26,419,581  
 
Payments on capital lease obligations
    (16,323 )     (18,735 )     (5,101 )     (5,101 )           (74,999 )
 
Proceeds from exercise of common stock options and warrants
                249,749       97,111       50,713       300,462  
 
Proceeds from sale of common stock and warrants, net of issuance costs
                                  8,168,215  
 
Proceeds from sale of restricted stock
          32,850                         32,850  
 
Repurchase of common stock
                                  (50,400 )
 
Repayment of loan payable
                                  (20,000 )
 
Repayment of installment note payable
                                  (10,804 )
                                     
 
Net cash provided by financing activities
    1,105,256       4,749,833       5,505,531       4,767,564       26,716,744       48,820,064  
                                     
Net increase (decrease) in cash and cash equivalents
    (1,204,125 )     1,697,410       (864,346 )     2,039,560       20,306,540       21,152,694  
Cash and cash equivalents — beginning of period
    1,217,215       13,090       1,710,500       1,710,500       846,154        
                                     
Cash and cash equivalents — end of period
  $ 13,090     $ 1,710,500     $ 846,154     $ 3,750,060       21,152,694     $ 21,152,694  
                                     
Supplemental disclosures of cash flows information:
                                               
 
Cash paid for interest
  $ 5,540     $ 3,052     $ 3,105     $ 1,141     $ 1,043     $ 59,140  
                                     

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
CONSOLIDATED STATEMENTS OF CASH FLOWS — (Continued)
                                                   
                        Cumulative for the
            Period From
    Year Ended December 31,   Six Months Ended June 30,   January 10, 1997
            (Date of Inception)
    2002   2003   2004   2004   2005   to June 30, 2005
                         
                (Unaudited)   (Unaudited)   (Unaudited)
Noncash investing and financing activities:
                                               
 
Notes payable to stockholders including accrued interest of $55,000 converted into Series A redeemable convertible preferred stock
  $     $ 605,000     $     $     $     $ 605,000  
 
Accrued expenses and accounts payable converted into Redeemable convertible preferred stock
          79,167       131,076                   210,243  
 
Leasehold improvements paid by landlord
          203,127                         203,127  
 
Issuance of notes payable for prepaid insurance and conversion of accrued expenses
                274,000                   274,000  
 
Property and equipment financed through accounts payable
          122,532       21,169       4,057       3,884       3,884  
 
Issuance of 2,097,154 shares of common stock and 2,125,200 stock options on acquisition of Zebra Pharmaceuticals, Inc., net of cash received
                                  10,041,257  
 
Acquisition of equipment under capital lease obligations
                                  74,999  
See notes to consolidated financial statements.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
1. NATURE OF BUSINESS AND OPERATIONS
Nature of Business  — Molecular Insight Pharmaceuticals, Inc. (the “Company”) was incorporated in January 1997 and is a biopharmaceutical company focused on the research, development and commercialization of innovative molecular imaging pharmaceuticals and targeted radiotherapeutics designed to improve patient diagnosis, treatment and management. The Company is based in Cambridge, Massachusetts.
Development Stage Company  — The Company’s revenue generating activities have been limited to research and development services pursuant to certain governmental research and development grants, and no revenues have been recorded from the sale of products from its planned principal business activity. Accordingly, the Company is classified as a development stage company.
Operations  — The Company has incurred net losses and negative operating cash flows since inception. As of December 31, 2004 and June 30, 2005, the Company had an accumulated deficit of $39.8 million and $46.2 million, respectively, and a stockholders’ deficit of $17.8 million and $24.4 million, respectively. The Company expects to incur additional losses and negative operating cash flows for the foreseeable future, which absent additional capital from the issuance of equity securities would increase the stockholders’ deficit in future periods.
The Company has funded its operations through December 31, 2004 through the issuance of redeemable convertible preferred stock, the issuance of common stock, borrowings from stockholders and others and revenues earned from government research and development grants. In 2005, the Company raised additional capital of $27.5 million from the issuance of redeemable convertible preferred stock (see Note 8) net of issuance costs. The Company’s long-term success is dependent on obtaining sufficient capital to fund the research and development of its products, to bring about their successful commercial release, to generate revenue and, ultimately, attain profitable operations. The Company believes that its available cash will be sufficient to finance its working capital and capital requirements through at least December 2006.
To achieve its business plan, the Company may be required to raise additional funds through public or private financings, strategic relationships or other arrangements. It can not be assured that such funding, if needed, will be available on terms attractive to the Company, or at all. In addition, any financing may be dilutive to stockholders and may involve restrictive covenants. The Company’s failure to raise capital as and when needed could have a negative impact on its financial condition and its ability to pursue its business strategy.
The Company is also subject to other risks common to companies in the biopharmaceutical industry including, but not limited to, new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations and approval requirements, commercialization of our potential products, uncertainty of market acceptance of products, competition from larger companies, ability to reach commercial production of its product candidates, and the need to obtain additional financing.
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Principles of Consolidation  — The consolidated financial statements include the accounts of the Company, its wholly owned subsidiary, Biostream Therapeutics, Inc. (“BTI”) from the date of acquisition, February 29, 2000, and its 63.6% owned subsidiary, ATP Therapeutics, Inc. (“ATP”),

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
from the date of its incorporation on March 4, 1999. ATP was formed as a joint venture by the Company and an independent physician to pursue pre-clinical development of certain patents held by the physician. The physician contributed a license on the patents to the joint venture for a 40% interest, and the Company received a 60% interest for its commitment to fund development. In September 2000, the Company purchased an additional 200,000 shares of unissued common stock of ATP for $1,000,000 thereby increasing its ownership interest to 63.6%. The Company has recognized all of ATP’s losses as the Company has been ATP’s sole source of funding and the Company’s equity has absorbed all losses. The minority interest in this investment is not material. Intercompany accounts and transactions for all subsidiaries have been eliminated in consolidation. As discussed in Note 12, the Company purchased the remaining balance of ATP and plans to liquidate the subsidiary.
Use of Estimates  — The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and use assumptions that affect reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the balance sheet dates and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates.
Significant estimates reflected in these financial statements include the estimated fair values of the Company’s common and redeemable convertible preferred stock, certain accruals and reserves, and the valuation allowance on the deferred tax assets.
Unaudited Interim Financial Statements  — The consolidated balance sheet as of June 30, 2005, the consolidated statements of operations and cash flows for the six months ended June 30, 2004 and 2005, and the consolidated statement of redeemable preferred stock and stockholders’ deficit for the six months ended June 30, 2005 are unaudited. These unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America. In the opinion of the Company’s management, the unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, consisting of normal recurring adjustments, necessary for the fair presentation of the Company’s financial position at June 30, 2005 and its results of operations and cash flows for the six months ended June 30, 2004 and 2005. The results of operations for the interim periods are not necessarily indicative of the results to be expected for any other interim period or any fiscal year.
Revenue Recognition  — The Company recognizes revenue from government grants for research and development as services are performed provided contractual agreements exist, the fees are fixed or determinable and the collection is probable. Amounts recognized are limited to amounts due from the grantor based upon the contract or grant terms. The Company has been awarded government grants from the National Institutes of Health (“NIH”) to provide research services related to certain areas of the Company’s research. Such grants are generally on a cost sharing basis with the Company also contributing to the costs of research. NIH grant revenue is recognized on a proportional performance basis as costs are incurred. Payments received in advance of costs being incurred are recorded as deferred revenue.
Under the terms of the NIH grants, the Company has all right, title and interest in its patents, copyrights and data pertaining to its product development, subject to certain rights of the government. Under existing regulations, the government receives a royalty-free license for federal government use for all patents developed under a government grant. In addition, under certain circumstances the

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
government may require the Company to license technology resulting from the government-funded projects to third parties and may require that the Company manufacture its product in the United States. However, ownership in such technology remains with the Company.
Funding of government grants is subject to government appropriation and all of these grants contain provisions which allow for termination at the convenience of the government. These grants require the Company to comply with certain government regulations. Management believes that the Company has complied with all regulations that, if not met, could have a material adverse impact on the Company’s consolidated financial statements or the Company’s eligibility for future grant awards.
Research and Development  — Research and development expense consists of expenses incurred in developing and testing product candidates. These expenses consist primarily of salaries and related expenses for personnel, fees paid to professional service providers in conjunction with independently monitoring clinical trials and acquiring and evaluating data in conjunction with clinical trials, costs of contract manufacturing services, costs of materials used in clinical trials and research and development, depreciation of capital assets used to develop products and costs of facilities. Research and development costs are expensed as incurred. Certain research and development activities are partially funded with government grants, which are recognized as revenue.
Cash and Cash Equivalents  — Cash and cash equivalents represent cash and highly liquid investments purchased within three months of the maturity date and consist of money market funds.
Property and Equipment  — Property and equipment are recorded at cost. Leased equipment accounted for as a capital lease is recorded at the present value of minimum lease payments at the inception of the lease. Depreciation and amortization is provided using the straight-line method over the estimated lives of the related assets or over the term of the lease (for leasehold improvements and leased equipment), if shorter. Useful lives and lease terms range from one to seven years.
Licensed Patent Rights  — On February 29, 2000, the Company acquired all of the outstanding stock of BTI, which was accounted for under the purchase method of accounting. The acquired licensed patent rights of $9.8 million were assigned a three year useful life. During 2002, the Company accelerated the amortization of this intangible asset as the Company was no longer pursuing the underlying research. Accordingly, the Company fully amortized the asset as of December 31, 2002. Amortization expense was $3,798,329 in 2002.
Impairment of Long-Lived Assets  — The Company reviews its long-lived assets for impairment when events or changes in circumstances indicate that the carrying amount of a long-lived asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.
Income Taxes  — Deferred tax assets and liabilities relate to temporary differences between financial reporting and income tax bases of assets and liabilities and are measured using enacted tax rates and laws expected to be in effect at the time of their reversal. Valuation allowances are established, when necessary, to reduce the net deferred tax asset to the amount more likely than not to be realized. For interim reporting periods, the Company uses the estimated annual effective tax rate.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
Stock-Based Compensation  — The Company accounts for its stock-based awards to employees and directors in their capacity as directors (hereafter referred to as “employees”) using the intrinsic-value method in accordance with Accounting Principles Board (“APB”) Opinion No. 25, Accounting for Stock Issued to Employees , and its related interpretations. The Company accounts for its stock-based awards to nonemployees using the fair value method in accordance with Statement of Financial Accounting Standards (“SFAS”) No. 123, Accounting for Stock-Based Compensation and Emerging Issues Task Force (“EITF”) Issue No. 96-18, Accounting for Equity Instruments That are Issued to Other Than Employees for Acquiring, or in Conjunction with Selling Goods and Services. See Note 3 for a more detailed discussion of stock-based compensation. Stock compensation costs are recognized over the service period of the awards, which is the vesting period for employees.
The Company has adopted the disclosure provisions of SFAS No. 123, for all employee stock-based awards. For purposes of the pro forma disclosure, the fair value of each employee option grant was determined using the Black-Scholes option pricing model. The assumptions used for all grants during the applicable periods presented are as follows:
                                         
                Six Months Ended
        June 30,
    Year Ended December 31,   (Unaudited)
         
    2002   2003   2004   2004   2005
                     
Risk-free interest rate
    3.03 %     2.44 %     2.84 %     2.75 %     3.54 %
Expected dividend yield
    0.0 %     0.0 %     0.0 %     0.0 %     0.0 %
Expected option life
    5 years       4 years       4 years       4 years       4 years  
Expected stock price volatility
    0.0 %     0.0 %     0.0 %     0.0 %     0.0 %

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
The pro forma impact on reported net loss attributable to common stockholders was as follows:
                                           
    Year Ended December 31,   Six Months Ended June 30,
         
    2002   2003   2004   2004   2005
                     
                (Unaudited)   (Unaudited)
Net loss attributable to common stockholders, as reported
  $ (7,083,506 )   $ (3,960,622 )   $ (9,627,535 )   $ (3,893,015 )   $ (8,188,821 )
Add back: stock-based employee compensation expense included in reported net loss
          338,904       312,894       239,825       635,971  
Deduct: stock-based employee compensation expense determined under fair value method
    (135,148 )     (486,248 )     (346,057 )     (251,542 )     (688,438 )
                               
Pro-forma net loss attributable to common stockholders
  $ (7,218,654 )   $ (4,107,966 )   $ (9,660,698 )   $ (3,904,732 )   $ (8,241,288 )
                               
Net loss per share attributable to common stockholders:
                                       
 
As reported
  $ (0.63 )   $ (0.19 )   $ (0.43 )   $ (0.18 )   $ (0.33 )
                               
 
Pro forma
  $ (0.64 )   $ (0.19 )   $ (0.43 )   $ (0.18 )   $ (0.33 )
                               
The effects of applying the provisions of SFAS No. 123 on net loss as stated above is not necessarily representative of the effects on the reported income or loss for future years due to, among other things, the adoption of SFAS No. 123(R) (as discussed below), the vesting period of the stock options and the fair value of additional stock options that may be granted in future years.
Net Loss Per Share  — Basic and diluted net loss per common share is calculated by dividing the net loss applicable to common stockholders by the weighted average number of unrestricted common shares outstanding during the period. Diluted net loss per share is the same as basic net loss per share, since the effects of potentially dilutive securities are anti-dilutive for all periods presented. Anti-dilutive securities, which consist of redeemable convertible preferred stock, common stock issuable upon

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
conversion of accrued cumulative dividends on preferred stock, stock options, warrants and convertible debt that are not included in the diluted net loss per share calculation, aggregated approximately 16,200,779, 37,412,477 and 47,892,440 potential common shares as of December 31, 2002, 2003 and 2004, respectively, and 47,864,481 and 79,169,447 as of June 30, 2004 and 2005, respectively. In addition, unvested common stock pursuant to restricted stock awards are excluded from the calculation of basic loss per share. The unvested common stock are excluded from the calculation of diluted loss per share as these are antidilutive.
The Company’s redeemable convertible preferred stock accrue dividends (see Note 8) that may either be paid in cash or in common stock at the election of the holder. If conversion is elected, the number of shares into which the dividends may be converted is based upon the conversion ratio for the redeemable convertible preferred stock and may result in the holders of the redeemable convertible preferred stock receiving common stock with a fair value that is greater than the recorded amount of accrued dividends. If the conversion feature of the accrued dividends has an intrinsic value greater than the dividend earned, the beneficial conversion feature is recognized and treated as a distribution to preferred stockholders for purposes of net loss per share calculations.
Concentration of Credit Risk and Significant Customers  — Financial instruments which potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents. The Company’s cash and cash equivalents were held at one financial institution at June 30, 2005. Management believes that the financial institution is of high credit quality. All of the Company’s research and development revenue is from a single United States government agency.
Guarantees: Indemnified Obligations  — The Company’s Articles of Organization, By-Laws and agreements with officers and directors provide that the Company indemnify its officers and directors for certain events or occurrences that happen by reason of the fact that the officer or director is, was, or has agreed to serve as an officer or director of the Company. The term of the indemnification period is for the officer or director’s lifetime. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited.
The Company leases office space under a non-cancelable operating lease (see Note 10). The Company has indemnification arrangements under this lease that require the Company to indemnify the landlord against claims, actions or damages incurred in connection with the premises covered by the Company’s lease and the Company’s use of the premises.
The Company had not experienced any losses related to these indemnification obligations, and no claims with respect thereto were outstanding at December 31, 2004 or June 30, 2005. The Company does not expect significant claims related to these indemnification obligations, and consequently concluded that the fair value of these obligations is negligible and no related reserves were established in any period presented in the accompanying consolidated financial statements.
Fair Value of Financial Instruments  — The carrying amounts of the Company’s financial instruments, which include cash equivalents, accounts receivable, accounts payable, accrued expenses and notes payable approximate their fair values due to the short term nature of the instruments.
Segments  — The Company conducts its operations and manages its business as one operating segment.
Recent Accounting Pronouncements  — In December 2004, the Financial Accounting Standards Board, (“FASB”), issued SFAS No. 123(R), Share-Based Payment . SFAS 123(R) addresses accounting for

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
share-based awards, including shares issued under employee stock purchase plans, stock options, and stock awards and stock appreciation rights. SFAS 123(R) will require the Company to expense share-based awards with compensation cost measured using the fair value of the awards. SFAS 123(R) is effective for the Company beginning January 1, 2006. The Company has not yet determined the effect that the adoption of SFAS 123(R) will have on its financial position and results of operations, although compensation costs recognized in operations will increase from historical levels for all fixed awards.
3. STOCK-BASED COMPENSATION
As discussed in Note 2, the Company accounts for its stock-based awards to employees using the intrinsic-value method and those to nonemployees using the fair value method. The Company’s awards include common stock options, common stock warrants and restricted common stock. Under the intrinsic-value method, stock compensation expense is determined on the measurement date, which is generally the grant date (except for performance based awards), as the amount by which the fair value of the common stock exceeds the exercise price to be paid by the employee multiplied by the number of shares granted. Under the fair value method, stock compensation expense is determined based upon the fair value of the award itself on the measurement date, which is generally the date on which the services are completed for nonemployees. The fair value of the award is determined using the Black-Scholes option pricing model.
In using the Black Scholes option pricing model the Company makes certain assumptions with respect to the estimated lives of the awards, volatility of the fair value of the common stock during the expected option life, risk free interest rates and dividends rates. As discussed in Note 2, no volatility is used in estimates made for the purpose of disclosing stock-based compensation attributable to employee awards. Volatility estimates are used in arriving at the fair value of nonemployee awards by taking data from comparable public companies in similar industries and markets.
Awards to nonemployees are subject to variable accounting whereby interim measurements of the fair value of the awards will be made from the date of issuance through the measurement dates of the awards. Changes in the fair value of the awards are recorded through the Company’s statement of operations over the performance period.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
Stock-based compensation expense for each period presented in the accompanying consolidated statements of operations are as follows:
                                                 
        Six Months Ended   Period From
    Year Ended December 31,   June 30,   January 10, 1997
            (Date of Inception)
    2002   2003   2004   2004   2005   to June 30, 2005
                         
                (Unaudited)   (Unaudited)   (Unaudited)
Stock-based compensation charged to:
                                               
Research and development
  $ 526     $ 222,526     $ 24,705     $ 7,159     $ 46,365     $ 1,914,197  
Research and development — related parties
    (3,398 )     13,855       23,156       11,578       21,876       55,489  
General and administrative
          256,505       310,542       241,558       606,211       4,333,037  
General and administrative — related parties
                                   
                                     
    $ (2,872 )   $ 492,886     $ 358,403     $ 260,295     $ 674,452     $ 6,302,723  
                                     
During 1997, the Company issued a total of 2,382,800 shares of common stock to employees and nonemployees at $0.005 per share, which was below the fair value of the common stock on the respective measurement dates of the awards. This resulted in stock-based compensation aggregating $4,221,699 which was expensed as follows: $439,200 in 1997, $1,813,375 in 1998 and $1,969,124 in 1999.
During 1998, 1999, 2000 and 2001, the Company granted stock options to purchase a total of 757,000 shares of common stock to employees with exercise prices below the fair market value of the common stock on the respective measurement dates or to nonemployees. The exercise prices ranged from $0.005 to $2.50 per share. Applying the intrinsic value method for the employee awards and the fair value method for the nonemployee awards resulted in stock-based compensation aggregating $514,029, of which a credit of ($2,872) was recorded in 2002. The amount was fully expensed by December 31, 2002.
In May of 2003, certain employees and nonemployees cancelled their stock option agreements with exercise prices ranging from $0.20 to $2.50 per share with a weighted-average exercise price of $1.09. A total of 2,230,540 options were cancelled for employees and 370,400 for nonemployees. Unamortized deferred stock-based compensation as of May 2003 of $68,450 was expensed upon cancellation. The Company granted, 181 days after cancellation, options having the same terms and with an exercise price equal to the then fair value of the Company’s common stock on such date. Accordingly, in December 2003 the Company issued to these same employees and nonemployees options to purchase 2,230,540 and 370,400 shares of common stock, respectively with an exercise price of $0.10 per share, the then fair value per share on the date of grant. The vesting and exercise periods for these newly issued options were consistent with the vesting and exercise period on the cancelled shares, with the exception of the employees’ options, which have an exercise period of 10 years. Also in 2003, the Company granted stock options for the purchase of 780,776 shares of common stock to nonemployees, all with an exercise price of $0.10 per share. Vesting for these options were either immediate or for terms up to four years. No incremental stock-based compensation resulted from the cancellation and re-grant of employee options. The Company recorded stock-based

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
compensation expense relating to the awards to nonemployees, including those awards cancelled and re-granted, of $74,732, $32,740, and $18,596 in 2003, 2004 and the six months ended June 30, 2005, respectively, using the fair value method and based on the Black-Scholes option-pricing model with the following assumptions: estimated useful life of 10 years, average risk-free interest rate of 4.3%, volatility of 65% and no expected dividends.
Also in 2003, the Company issued 6,476 shares of Series A redeemable convertible preferred stock in lieu of cash compensation to certain officers and employees. The fair value of the stock of $349,704 was recorded as stock-based compensation expense in the year ended December 31, 2003.
During 2004 and the six months ended June 30, 2005, the Company granted stock options to purchase 85,606 and 165,000 shares, respectively, of common stock to nonemployees at an exercise price of $0.10 and $0.20 per share, respectively. The Company recorded stock-based compensation expense relating to these awards of $12,770 and $5,188 in 2004 and the six months ended June 30, 2005, respectively, using the fair value method and based on the Black-Scholes option-pricing model with the following assumptions: estimated useful life of 10 years, average risk-free interest rate of 4.23%, volatility of 66% and no expected dividends.
During 2004 and the six months ended June 30, 2005, the Company granted stock options to purchase 762,500 and 1,460,000 shares, respectively, of common stock to employees at an exercise price of $0.10 and $0.20 per share, respectively. The stated exercise prices were determined to be below the fair value of the common stock on the measurement dates. As a result, the Company has recorded deferred stock compensation of $137,250 in 2004 and $496,400 for the six months ended June 30, 2005 for the difference between the exercise price per share and the fair value per share at the respective grant dates. Compensation expense related to stock options granted to the employees was $17,243 and $64,381 for the year ended December 31, 2004 and the six months ended June 30, 2005, respectively. As of December 31, 2004 and June 30, 2005, the Company had an aggregate of $120,006 and $547,326 respectively of deferred stock-based compensation remaining to be amortized related to these awards. Based upon the vesting periods of the awards, this deferred stock-based compensation balance is expected to be expensed as follows: approximately $80,000 during the remainder of 2005; $153,000 during 2006 and 2007; $136,000 during 2008, and $17,000 during 2009. These amounts could increase upon the Company’s adoption of SFAS No. 123(R) on January 1, 2006. The Company has not yet determined the full extent that the adoption of SFAS No. 123(R) will have on its financial position or results of operation.
During 2003, the Company issued to the Chief Executive Officer 3,285,000 shares of restricted common stock in exchange for $32,850 in cash and the issuance of a partial recourse (50%), non interest bearing note receivable for $295,650. These shares are subject to Stock Restriction and Stock Pledge Agreements. Under the terms of these Agreements, the shares vest through February 7, 2007 and if the Chief Executive Officer were to terminate employment for any reason prior to February 7, 2007, any unvested shares are repurchasable by the Company at the original issuance price or a price determined based upon a formula that changes upon the termination circumstances. As of December 31, 2004 and June 30, 2005, 1,806,750 and 2,135,250 of these shares are vested, respectively. Every three months thereafter another 164,250 shares are scheduled to vest. The underlying shares issued to the Chief Executive Officer are subject to variable accounting treatment until a measurement date occurs. Accordingly, until the final measurement date occurs, compensation is measured as the greater of the fair value of the shares over the purchase cost and such compensation

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
is being recognized over the vesting term of the shares. Because the fair value of the shares may fluctuate, any increase or decrease in the fair value of the shares at each of the Company’s reporting dates will result in periodic increases and decreases in the amount of compensation expense recognized in any reporting period. There was no compensation expense in 2003 relating to these shares because the fair value of the shares on the issuance date and December 31, 2003 was the same. However, in 2004, due to an increase in the fair value of the shares, the Company recorded deferred stock-based compensation of $591,300 and $854,100 for the year ended December 31, 2004 and the six months ended June 30, 2005, respectively. The Company recognized $295,650, $236,520 and $571,590 of compensation expense included in general and administrative expense pursuant to this agreement for the year ended December 31, 2004 and for six months ended June 30, 2004 and June 30, 2005, respectively.
Stock Option Plan  — In 1997, the Company’s stockholders and Board of Directors approved the 1997 Stock Option Plan (the “1997 Plan”). Under the 1997 Plan, the Board of Directors may grant incentive stock options and nonqualified stock options to officers, directors, and other key employees of the Company, its subsidiaries and non-employee officers, directors and consultants.
The 1997 Plan permits the Board of Directors to determine the number of option shares, the exercise price, the vesting schedule and the expiration date of stock options. With respect to incentive stock options, the 1997 Plan provides that the exercise price of each such option must be at least equal to 100% of the fair market value of the common stock on the date that such option is granted (110% of fair market value in the case of stockholders who, at the time the option is granted, own more than 10% of the total outstanding common stock), and requires that all such options have an expiration date before the tenth anniversary of the date of the grant of such options (or the fifth anniversary of the date of grant in the case of 10% stockholders). The Company has reserved 13,000,000 shares of common stock for issuance under the 1997 Plan. Options typically expire 10 years from the date of grant and generally vest over a period of four years from the date of grant. As of December 31, 2004 and June 30, 2005, the Company had 5,007,958 and 3,401,958 shares of common stock, respectively available for future grant under the 1997 Plan.
In determining the exercise prices for awards and options granted, the Company’s Board of Directors has considered the fair value of the common stock as of the measurement date. The fair value of the common stock has been determined by the Board of Directors after considering a broad range of factors including, but not limited to, the illiquid nature of an investment in common stock, the Company’s historical financial performance and financial position, the Company’s future prospects and opportunity for liquidity events, and recent sale and offer prices of the common and redeemable convertible preferred stock in private transactions negotiated at arm’s length. In September 2005, the Company also obtained independent valuation reports to support the fair value of the Company’s common stock which was determined to be $0.28 as of December 31, 2004 and $0.54 as of June 30, 2005.
During the six months ended June 30, 2005, the Company granted to three executive officers options providing for the purchase of 1,280,000 shares of common stock at $0.20 per share. Options for the purchase of 640,000 shares vest ratably over a four year period and the remaining 640,000 shares vest upon the earlier of the fourth anniversary of the grant date or the achievement of performance milestones (including an initial public offering of the Company’s common stock, regulatory approvals and other).

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
During the six months ended June 30, 2005 additional options to purchase 345,000 common shares at $0.20 per share were issued to other employees and vest over four years.
The Company has concluded that the deemed fair value of the common stock on each measurement date in 2004 and through June 30, 2005 for measuring stock-based compensation was $0.28 and $0.54, respectively.
Certain of the Company’s option agreements provide that in the event of a change in control of the Company, as defined, any unvested options will become immediately vested and exercisable. The total shares of common stock pursuant to such unvested options as of December 31, 2004 and June 30, 2005 were approximately 2,315,000 and 2,730,000, respectively.
Information concerning all stock option activity for the years ended December 31, 2002, 2003, and 2004 and for the six months ended June 30, 2005 is summarized as follows:
                                                                 
    2002   2003   2004   June 30, 2005
                 
        Weighted       Weighted       Weighted       Weighted
        Average       Average       Average       Average
    Number   Exercise   Number   Exercise   Number   Exercise   Number   Exercise
    of   Price per   of   Price per   of   Price per   of   Price per
    Shares   Share   Shares   Share   Shares   Share   Shares   Share
                                 
                            (Unaudited)
Options outstanding, beginning of period
    3,180,400     $ 1.04       3,384,040     $ 0.96       7,153,936     $ 0.13       6,016,048     $ 0.14  
Granted
    256,140       0.10       6,502,836       0.10       848,106       0.10       1,625,000       0.20  
Exercised
                                    (1,975,994 )     0.10       (507,141 )     0.10  
Forfeited
    (52,500 )     1.83       (132,000 )     0.90       (10,000 )     0.10       (19,000 )     0.61  
Cancelled
                    (2,600,940 )     1.10                                  
                                                 
Options outstanding, end of period
    3,384,040     $ 0.96       7,153,936     $ 0.13       6,016,048     $ 0.14       7,114,907     $ 0.16  
                                                 
Options exercisable
    2,741,337     $ 0.88       4,504,642     $ 0.14       3,471,043     $ 0.16       3,482,594     $ 0.16  
                                                 
Options available for grant
                                    5,007,958               3,401,958          
                                                 
Weighted average fair value of options granted during the periods
  $ 0.01             $ 0.01             $ 0.20             $ 0.38          
                                                 

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
The following table summarizes additional information about stock options outstanding at December 31, 2004:
                                             
        Weighted            
        Average   Weighted       Weighted
    Number of   Remaining   Average   Number of   Average
Range of   Options   Contractual   Exercise   Options   Exercise
Exercise Price   Outstanding   Life (Years)   Price   Exercisable   Price
                     
$ 0.01       90,000       3.47     $ 0.01       90,000     $ 0.01  
  0.01       221,760       5.08       0.01       221,760       0.01  
  0.10       5,563,088       8.64       0.10       3,018,083       0.10  
  0.45       12,000       6.42       0.45       12,000       0.45  
  1.63-2.50       129,200       5.09       1.92       129,200       1.92  
                                 
$ 0.005-$2.50       6,016,048       8.32     $ 0.14       3,471,043     $ 0.116  
                                 
The following table summarizes additional information about stock options outstanding at June 30, 2005:
                                             
        Weighted            
        Average   Weighted       Weighted
    Number of   Remaining   Average   Number of   Average
    Options   Contractual   Exercise   Options   Exercise
Exercise Price   Outstanding   Life (Years)   Price   Exercisable   Price
                     
$ 0.01       90,000       2.97     $ 0.01       90,000     $ 0.01  
  0.01       221,760       4.58       0.01       221,760       0.01  
  0.10       5,040,947       8.12       0.10       3,033,634       0.10  
  0.20       1,625,000       9.67       0.20             0.20  
  0.45       12,000       5.92       0.45       12,000       0.45  
  1.63-2.50       125,200       4.58       1.90       125,200       1.90  
                                 
$ 0.005-$2.50       7,114,907       8.23     $ 0.151       3,482,594     $ 0.16  
                                 
4. PROPERTY AND EQUIPMENT 
           Property and equipment consist of the following:
                   
    As of December 31,
     
    2003   2004
         
Lab and other equipment
  $ 339,089     $ 422,498  
Furniture and fixtures
    73,511       57,146  
Leasehold improvements
    662,802       678,041  
             
 
Total property and equipment, at cost
    1,075,402       1,157,685  
Less accumulated depreciation and amortization
    (691,572 )     (778,882 )
             
 
Property and equipment, net
  $ 383,830     $ 378,803  
             
In 2003, the Company entered into a new lease for its current facility (See Note 10). The agreement provided for the landlord to pay approximately 67% or up to a maximum of approximately $205,000

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
of agreed upon leasehold improvements. The improvements were completed in December 2003 and the space was placed into service in January 2004. The Company’s portion of leasehold improvements was $121,364 and the landlord’s portion was $203,127. The Company’s portion is included in leasehold improvements. The landlord’s portion has been recorded with a corresponding liability recorded for deferred rent. The deferred rent is being amortized as additional rent expense over the remaining term of the lease. The current portion of the deferred rent is included in accrued expenses in the accompanying consolidated balance sheets and is shown in Note 5. The long-term portion of deferred rent is presented separately in the accompanying consolidated balance sheets.
Depreciation and amortization expense was $129,638, $92,712, $106,206, $52,574 and $61,404 for the years ended December 31, 2002, 2003 and 2004 and the six months ended June 30, 2004 and 2005, respectively.
5. ACCRUED EXPENSES
Accrued expenses consist of the following:
                         
    As of December 31,   As of
        June 30,
    2003   2004   2005
             
            (Unaudited)
Professional fees
  $ 110,000     $ 266,632     $ 259,331  
Accrued bonuses
          521,095       422,105  
Accrued payroll
    11,893       32,876       14,030  
Accrued vacation
    17,893       49,220       49,220  
Deferred rent — current portion
    45,140       45,140       45,140  
Clinical trials
    62,312       131,620       61,806  
Clinical trial material
                334,230  
Other
    2,574       51,547       18,609  
                   
Total
  $ 249,812     $ 1,098,130     $ 1,204,471  
                   
6. NOTES PAYABLE
In 2002, the Company issued unsecured notes payable (“Notes”) to two members of its Board of Directors (who are also officers and stockholders) totaling $550,000, bearing annual interest at 10%, all payable within one year. In addition, the Notes included detached warrants to purchase 203,704 shares of the Company’s common stock at $0.27 per share. The principal and accrued interest of $55,000 was converted in 2003 into 11,204 shares of Series A redeemable convertible preferred stock at $54.00 per share, the price at which that tranche of Series A redeemable convertible preferred stock had been issued. The fair value of the warrants on the date of grant was determined to be $2,200 using the Black-Scholes option-pricing model (and the following assumptions: life of two years (full term), volatility of 72% and a risk-free rate of interest of 1.45%). Accordingly, $2,200 was allocated to the warrants and recorded as a discount to the Notes and this debt discount was amortized to interest expense over the life of the Notes (one year). As a result, the Company recorded $1,100 of interest expense in each of 2003 and 2002. The warrants were exercised in 2004 (see Note 9).
In February, 2004 the Company issued an unsecured note payable to its legal counsel for approximately $103,000, representing the then outstanding balance of invoices for professional

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
services. The note, bearing no interest, is payable in monthly installments of $5,000 beginning in March 2004 until paid in full in November, 2005. As of December 31, 2004 and June 30, 2005 the outstanding balance of $52,864 and $22,864, respectively, have been included in notes payable in the accompanying consolidated balance sheets.
In 2004, the Company entered into two commercial financing agreements with a vendor to finance the payment of approximately $168,000 in insurance premiums for up to 12 months. Finance charges of approximately $3,000 (annual percentage rates of approximately 5-6%) was added to the principal. At December 31, 2004, the total balance due was $98,550, and has been included in notes payable in the accompanying consolidated balance sheets. There was no balance outstanding as of June 30, 2005.
In December of 2004, the Company issued an unsecured convertible note payable to a new investor for $700,000, due one year from the date of issuance, at an annual interest rate of 3%. The full outstanding principal amount of the note, plus accrued interest, had a mandatory conversion feature into either (i) preferred stock at a price per share at which a qualified financing, as defined, was completed subsequent to the issuance of the note but prior to maturity, or (ii) into shares of Series B redeemable convertible preferred stock at the rate of $132 per share, in the event the Company was unable to complete a qualified financing prior to maturity. In April, 2005, the principal and accrued interest of $5,586 were converted into 3,493 shares of Series C redeemable convertible preferred stock (“Series C”) at $202 per share, the price at which Series C had been issued (See Note 8).
In March of 2005, the Company issued unsecured convertible promissory notes to three existing stockholders (one being a member of the Board of Directors) for a total principal of approximately $375,000, due one year from the date of issuance, at an annual interest rate of 3%. The full outstanding principle amount of the notes, plus accrued interest, carried a mandatory conversion feature into either (i) preferred stock at a price per share at which a qualified financing, as defined, was completed subsequent to the issuance of the notes but prior to maturity, or (ii) into shares of Series B redeemable convertible preferred stock at the rate of $132 per share, in the event the Company was unable to complete a qualified financing prior to maturity. In April, 2005, the principal amount was converted into 1,983 shares of Series C redeemable convertible preferred stock at $202 per share, the price at which Series C had been issued (See Note 8).

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
7. INCOME TAXES
The Company has recorded no provision or benefit for income taxes for any period presented due to its net operating losses and doubt as to the realizability of the resulting carryforwards of those losses and other deferred tax assets. Deferred tax assets consisted of the following:
                   
    As of December 31,
     
    2003   2004
         
Deferred tax assets:
               
 
Net operating loss carryforwards
  $ 6,725,000     $ 8,014,000  
 
Deferred research and development costs
          1,661,000  
 
Research and development tax credits
    874,000       1,156,000  
 
Property and equipment
    112,000       136,000  
 
Accrued expenses
    83,000       289,000  
             
      7,794,000       11,256,000  
Valuation allowance
    7,794,000       11,256,000  
             
Net deferred tax asset
  $     $  
             
As of December 31, 2004, the Company had net operating loss carryforwards totaling approximately $20 million (federal) and $17 million (state), which expire at various dates from 2011 through 2024 (federal) and from 2005 through 2009 (state). The amount of the net operating loss carryforwards that may be utilized to offset future taxable income, when earned, may be subject to certain limitations, based upon changes in the ownership of the Company’s stock that have and/or may occur. The Company has not conducted an evaluation as to whether any portion of its tax loss carryforwards has been limited, and therefore, based upon the changes in ownership, a limitation may have occurred. As of December 31, 2004, the Company had research and development tax credits totaling approximately $809,000 (federal) and $347,000 (state), which are available to offset future tax liabilities when incurred and fully expire in 2024 (federal) and 2019 (state).
The Company has recorded a full valuation allowance against its net deferred tax assets since the Company believes it is more likely than not, that it will not be able to realize the assets. During 2002, 2003 and 2004, the valuation allowance increased by approximately $1,331,000, $1,400,000 and $3,595,000, respectively. The change in the valuation allowance in each year is due to the asset increasing each year (primarily from the net operating loss carryforwards and research and development tax credits) and the Company’s policy of providing a full valuation against the asset for the reason stated above.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
8. REDEEMABLE CONVERTIBLE PREFERRED STOCK
The Company has authorized 359,515 shares of preferred stock for issuance, of which certain shares are designated as Series A redeemable convertible preferred stock (“Series A”), Series B redeemable convertible preferred stock (“Series B”) and Series C redeemable convertible preferred stock (“Series C”). The Company first issued redeemable convertible preferred stock in 2003. The following table summarizes the activity and other information for the redeemable convertible preferred stock commencing in 2003:
                                                                 
    Series A   Series B   Series C (Unaudited)   Total (Unaudited)
                 
    Number   Carrying   Number   Carrying   Number   Carrying   Number   Carrying
    of Shares   Value   of Shares   Value   of Shares   Value   of Shares   Value
                                 
Shares designated at:
                                                               
December 31, 2004
    150,000             61,000                               211,000  
                                                 
June 30, 2005 (Unaudited)
    150,000             61,000             148,515                   359,515  
                                                 
Balance January 1, 2003
        $           $           $           $  
Issuance of Series A, net of $259,843 of issuance costs
    94,697       5,555,610                               94,697       5,555,610  
Issuance of Series A as stock-based compensation
    6,476       349,704                               6,476       349,704  
Conversion of accounts payable, accrued expenses, and notes into Series A
    19,144       1,033,871                               19,144       1,033,871  
Preferred stock dividends
          560,926                                     560,926  
Accretion of issuance costs
          51,969                                     51,969  
                                                 
Balance, December 31, 2003
    120,317       7,552,080                               120,317       7,552,080  
Issuance of Series B, net of $198,514 of issuance costs
                52,670       6,542,786                   52,670       6,542,786  
Conversion of accrued expenses into Series B
                993       131,076                   993       131,076  
Accretion of issuance costs
          51,969             243,243                         295,212  
Preferred stock dividends
          673,792             343,128                         1,016,920  
                                                 
Balance, December 31, 2004
    120,317       8,277,841       53,663       7,260,233                       173,980       15,538,074  
Issuance of Series C, net of $1,106,800 of issuance costs (Unaudited)
                                    141,590       27,470,581       141,590       27,470,581  
Accretion of issuance costs (Unaudited)
            24,878               91,980               74,739               191,597  
Series B warrant modification (Unaudited)
                                            (560,000 )             (560,000 )
Preferred stock dividends (Unaudited)
            644,883               177,088               346,621               1,168,592  
                                                 

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
                                                                 
    Series A   Series B   Series C (Unaudited)   Total (Unaudited)
                 
    Number   Carrying   Number   Carrying   Number   Carrying   Number   Carrying
    of Shares   Value   of Shares   Value   of Shares   Value   of Shares   Value
                                 
Balance, June 30, 2005 (Unaudited)
    120,317     $ 8,947,602       53,663     $ 7,529,301       141,590     $ 27,331,941       315,570     $ 43,808,844  
                                                 
Liquidation preference at:
                                                               
December 31, 2003
          $ 10,647,000             $             $             $ 10,647,000  
December 31, 2004
            13,979,000               7,427,000                             21,406,000  
June 30, 2005 (Unaudited)
            16,044,000               7,604,000               28,948,000               52,596,000  
Redemption value at:
                                                               
December 31, 2003
          $ 7,760,000             $             $             $ 7,760,000  
December 31, 2004
            8,434,000               7,427,000                             15,861,000  
June 30, 2005 (Unaudited)
            8,771,000               7,604,000               28,948,000               45,323,000  
In 2001, the Company collected approximately $2,820,000 in subscriptions for a proposed issuance of Series A at $70 per share from new and existing investors. An additional $250,000 in subscriptions was received in the beginning of 2002 from new and existing investors, also at $70 per share. Subsequent to the initial subscriptions, the Company began to experience pressure on the price being asked from new prospective investors. The Company continued to pursue raising equity by reducing the price per share of the proposed Series A to $54 per share for new subscriptions, and subsequently received approximately $380,000 in 2002 and $2,363,000 in 2003 from new and existing investors. The Company settled these advances by issuing a total of 94,698 shares of Series A in 2003 at the previously described purchase prices of $70 and $54 per share. Both existing and new investors participated in purchasing Series A. New investors purchased 15% and 15% of the Series A at the $70 and $54 per share price, respectively. The Company incurred $259,843 in costs associated with the issuance of the Series A and such costs were recorded as a reduction in the carrying value of the Series A.
Also in 2003, the Company issued a total of 19,146 shares of Series A at a price of $54 per share made up of (1) conversion of two notes payable with principal of $550,000 and accrued interest of $55,000 to two members of its Board of Directors (who are also officers and stockholders) for 11,204 shares of Series A (see Note 6), (2) Stock-based compensation for officers and employees in the amount of $118,900 represented by 2,202 shares of Series A (see Note 3), and (3) conversion of accounts payable and accrued expenses in the amount of $310,000 for 5,740 shares of Series A. These conversions were based upon the $54 per share price.
In the fourth quarter of 2003, subsequent to the above 2003 transactions, the Company received additional advanced stock subscriptions aggregating $2,118,800 for a planned sale of Series B. During 2004, the Company issued 52,670 shares of Series B at $132 per share in exchange for the $2,118,800 of net stock subscription proceeds received in 2003, as well as for the additional cash proceeds of $4,833,500 received in 2004. The Company incurred $198,514 in costs associated with the issuance of the Series B; such costs were recorded as a reduction in the carrying value of the Series B.
Also in 2004, the Company issued 993 shares of Series B at a price of $132 per share in settlement of $131,000 of accrued liabilities.
In connection with the issuance of the Series B, the holders of Series B received warrants to purchase 2,146,520 shares of common stock at $0.66 per share (“Series B Warrants”). The Series B

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
warrants were to expire on the earlier of the consummation of a qualified financing (as defined) or five years from date of issuance (see Note 9).
In March and April of 2005, the Company issued 136,115 shares of Series C at $202 per share for net cash proceeds of $27.5 million. The Company incurred $1,106,800 in costs associated with the issuance of the Series C; such costs were recorded as a reduction in the carrying value of the Series C.
In addition, in March 2005, the Company issued (1) 3,493 shares of Series C at $202 per share upon conversion of a note payable with principal of $700,000 and accrued interest of $5,586 (see Note 6) and (2) 1,983 shares of Series C at $202 per share upon conversion of three notes payable with a total principal of approximately $400,000 (see Note 6).
In connection with the issuance of the Series C, the Company issued a warrant to purchase 99,010 shares of the Company’s common stock to its placement agent. The warrant expires five years from the date of grant and has an exercise price of $1.01 per share (see Note 9).
The rights, preferences and privileges of the Series A, Series B and Series C (collectively “Preferred Stock”) are detailed below:
  Voting Rights  — Generally, Series A, Series B and Series C preferred stockholders vote together with all other classes and series of stock as a single class on all actions to be taken by the stockholders. The Company’s Articles of Organization does provide that each of Series A, B and C shall vote separately for approval of certain transactions, including, without limitation, the amendment of the Company’s Certificate of Organization in a manner that would adversely affect each such series of Preferred Stock, the liquidation or dissolution of the Company, the acquisition of another entity, changing the Company’s line of business, declaring dividends and similar matters. Series A, B and C shares entitle each holder to such number of votes per share as is equal to the number of whole shares into which the stock is convertible, subject to certain restrictions as defined. In accordance with an agreement signed in 2005 among certain holders of common stock, Series A, Series B and Series C, such holders will cause and maintain election to the Board of Directors of one Series A director, as designated by the Company’s Chief Executive Officer, who shall initially be the Company’s Chief Executive Officer, one Series B director, as designated by Cerberus Partners, L.P., the largest holder of Series B, one Series C director, as defined, one management director, who shall initially be the Company’s President, and three additional directors with appropriate industry experience and qualified outside directors, as defined.
 
  Dividends  — Dividends are cumulative whether or not declared by the Board of Directors and accrue at a quarterly rate per share of $1.40 for Series A, $1.65 for Series B and at an annual rate of 5% for Series C. Upon the occurrence of a liquidation event or mandatory conversion, as defined, of the Series A, Series B or Series C, the dividends accrued but unpaid, are payable by the Company and, at the option of the holder, may be payable in shares of the Company’s common stock at a conversion price equal to $0.35 and $0.66 with respect to Series A and B, respectively and with respect to Series C, the lesser of $1.01 or the fair value of the Company’s common stock at time of conversion. The preferred stock is senior to all common stock with respect to dividends, and Series C is senior to Series B with respect to dividends, and Series B is senior to Series A with respect to dividends. No dividends shall be paid or declared on common shares or any other class of stock which are junior to the Preferred Stock. At December 31, 2004 and June 30, 2005 accrued and unpaid dividends were as follows: for Series A — $1,234,718 and $1,879,601,

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
  respectively; for Series B — $343,128 and $520,216, respectively: for Series C — $0 and $346,621, respectively.
 
  As described above, certain Series A stockholders made payments in 2001 and 2002 in advance of the Series A closing which did not occur until January 2003. For many of these stockholders, the date between their advance and issuance of stock was much greater than was expected. In 2005, upon a review of the Series A documents by the Company’s newly hired legal counsel, it was brought to management’s attention that the extended period between certain advances and the Series A closing was not typical. Management brought this to the attention of the Company’s Board of Directors at a meeting in February, 2005 and, after considering the matters, the Board of Directors approved $308,000 to be added to the cumulative dividends accrued on the Series A held by these investors. The original subscription agreements entered into by these stockholders did not require a payment of interest or dividends. The amount has been added to the carrying value of the Series A in February 2005. This amount has not been declared and is not to be paid in cash. However, all dividends are payable in cash or convertible into common stock upon any conversion of the redeemable preferred stock. On the date the special dividend was approved, the special dividend (if converted) would be convertible into approximately 880,000 shares of common stock which had a fair value of approximately $475,000. The beneficial amount of $167,000 has been included in redeemable convertible preferred stock dividends and accretion of issuance costs in the accompanying consolidated statements of operations for the six months ended June 30, 2005. Several Company officers, including the Chief Executive Officer, were recipients of the special dividend as they held Series A.
 
  Liquidation  — In the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Company, or in the event of insolvency, as defined, the holders of Series C are entitled to receive before any distribution or payment is made to any holders of common stock or any other class or series of capital stock, an amount for Series C equal to $202 per share plus any accrued but unpaid dividends. Upon the availability of funds after Series C payments, Series A and B are entitled to receive, before any distribution or payment is made to any holders of common stock or any other class or series of capital stock, an amount for Series A equal to $70 per share plus a 30% compounded annual return on the original purchase price, plus any accrued but unpaid dividends, and an amount for Series B equal to $132 per share plus any accrued but unpaid dividends. If such amount per share of Series A or Series B would have been higher if each share had converted to common stock immediately prior to such liquidating event, as defined, then that higher amount would be paid in liquidation. After the liquidation preference payments to all preferred stockholders, the remaining assets of the Company available for distribution shall be distributed ratably among the holders of common stock.
 
  If, upon any such liquidation, dissolution or winding-up of the Company, as defined, the remaining assets of the Company available for distribution to its stockholders are insufficient to pay the holders of Series C the full amounts to which they are entitled, the holders of Series C shall share ratably in any distribution of the remaining assets and funds of the Company pursuant to the terms of the respective agreements. The same then holds true for the Series A and Series B stockholders.
 
  Conversion  — The Series A, Series B and Series C are convertible at any time into common stock on a 200-to-1 ratio. This ratio is subject to adjustment upon certain events such as a stock split,

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
  subdivision of the Company’s common stock, recapitalization of the Company’s capital stock or similar event. Additionally, the Series C is subject to adjustment for any equity issued at a lower price per share pursuant to a weighted average anti-dilution provision. Certain issuance, such as issuances pursuant to the Company’s option plan, upon the conversion of preferred stock or as approved by the stockholders, are excluded for this anti-dilution protection and, therefore, no adjustment to the conversion ratio will be made upon those stock issuances. Through June 30, 2005, no adjustment to the conversion price has occurred.
 
  The Series A mandatorily converts into common stock (i) immediately prior to the closing of an initial public offering where the gross proceeds to the Company equal or exceed $15 million and the price per share in the offering is 200% of the then current conversion price of the Series A, (ii) upon the sale of all or substantially all of the Company’s common stock for a price that is at least 200% of the Series A conversion price then in effect or (iii) upon the consent of a majority of the Series A to conversion. The Series B mandatorily converts into common stock (i) immediately prior to the closing of an initial public offering where the gross proceeds to the Company and/or the stockholders equals or exceeds $10 million, (ii) upon the consent of a majority of the Company’s stockholders to effect the sale of all or substantially all of its capital stock to a third party or (iii) upon the consent of a majority of the Company’s stockholders to effect the merger or consolidation of the Company with a third party pursuant to which the Company is not the surviving entity or there is a change in voting control of the Company. The Series C mandatorily converts into common stock (i) immediately prior to the closing of an initial public offering where the gross proceeds to the Company equal or exceed $30 million and the price per share in the offering equals or exceeds $5 per share, or (ii) upon the consent of a majority of the Series C to such conversion.
 
  Redemption  — At the written election of any holder of Series A made not less that 30 days prior to defined anniversaries of the date the stock was first issued, the Company is required to redeem shares as follows: on the fifth anniversary in 2008, up to 33 1 / 3 % of the shares then held, on the sixth anniversary in 2009, up to 66 2 / 3 %, and on the seventh anniversary in 2010, up to 100% of shares then held. These redemption rights of Series A shall terminate, if not otherwise exercised, in 2011 on the eighth anniversary date of the first issue date of the shares. The redemption price is equal to the Series A purchase price ($54 or $70 per share) plus all accrued but unpaid dividends.
 
  At the written election of any holder of Series B at least 10 days prior to the date of the consummation of the completion of a qualified financing, the Company shall redeem up to 33 1 / 3 % of the shares then held. A qualified financing with respect to the Series B is defined as one in which the Company raises an aggregate net proceeds of at least $10 million through the sale of stock in one or more related transactions. Although considered a Qualified Financing, the Series C was excluded from this definition by amendment to the Company’s charter for Series B prior to the Series C issuance in 2005. Prior to that time, however, the Company chose 2005 as a first date of redemption for the Series B.
 
  In addition, the Series B holder may redeem up to 66 2 / 3 % of the shares then held on the first anniversary of the issue date, and up to 100% of the shares then held on the second anniversary of the issue date. The redemption price is equal to the Series B purchase price of $132 per share plus all accrued but unpaid dividends.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
  By written notice to the Company by a majority of the holders of Series C given at any time on or after the seventh (7th) anniversary in 2012, subject to certain restrictions, as defined, the Company shall redeem all, but not less than all, of the outstanding shares of Series C. The redemption price is equal to the Series C purchase price of $202 per share plus all accrued but unpaid dividends.
 
  The following is a schedule of redemption values (1):
                     
    As of   As of    
Issuance   December 31, 2004   June 30, 2005   First Date of Redemption
             
        (Unaudited)    
Series A (2)
  $ 8,434,000     $ 8,771,000     January, 2008
Series B (3)
    7,427,000       7,604,000     Upon notice of a qualified
financing (as defined)
Series C (4)
          28,948,000     March, 2012
                 
    $ 15,861,000     $ 45,323,000      
                 
 
(1) Amounts shown include the original purchase price plus dividends accrued through dates shown. Amounts change due to the accrual of dividends; therefore the actual redemption amounts, if ever redeemed, will be different.
 
(2) Based on the redemption period described above, shares of Series A may be redeemed as follows: up to 40,107, 80,213 and 120,320 in 2008, 2009 and 2010, respectively. The redemption value of these shares will increase annually due to the accrual of dividends at a quarterly dividend rate per share of $1.40.
 
(3) Based on the redemption criteria described above, shares of Series B may be redeemed as follows: up to 17,888, 35,775 and 53,663 beginning on the date of a qualified financing (as defined) followed by the first and second anniversary thereafter, respectively. The redemption value of these shares will increase annually due to the accrual of dividends at a quarterly dividend rate per share of $1.65.
 
(4) Based on the redemption period described above, all shares of Series C may be redeemed in 2012. The redemption value of these shares will increase annually due to the accrual of dividends at a quarterly dividend rate per share of $5%.
The Company is accreting the stock issuance costs of each series of redeemable convertible preferred stock from the original issuance date through the earliest dates of redemption using the effective interest method. These direct costs generally consist of fees paid to placement agents, the fair value of warrants issued to placement agents, legal fees, statutory fees and other direct costs. For the Series A, B and C, the total costs of issuance being accreted are $259,843, $198,514 and $1,106,800, respectively. The accretion increases the carrying value of the redeemable convertible preferred stock and reduces additional paid-in capital. Amounts accreted are shown in the first table of this Note.
Advances received for stock subscriptions have been classified as current liabilities in the accompanying balance sheets as such amounts were intended, and subsequently were, for conversion into shares of redeemable convertible preferred stock.
9. STOCKHOLDERS’ DEFICIT
On January 10, 1997, the Company issued 2,996,800 shares of common stock to its founders pursuant to restricted stock arrangements for $12,254 in cash and deferred stock-based compensation of $546,000.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
In 1997, the Company issued 1,846,800 shares of common stock to employees and nonemployees for $18,250 in cash and deferred stock-based compensation of $1,673,200.
In 1998, the Company issued 792,690 shares of common stock to existing and new stockholders for $1,288,121 in cash.
In 1999, the Company issued 650,000 shares of common stock to existing and new stockholders for $1,625,000 in cash.
In 1999, the Company purchased 210,000 shares of common stock from an employee who left the Company pursuant to a restricted stock agreement for $50,400 (the common stock being retired in 2000).
In 2000, the Company issued 2,258,200 shares of its common stock for $2.50 per share, resulting in total proceeds of $5,645,500. The Company incurred cash costs of $392,406 in connection with the sale and committed to issue a warrant with a fair value of $271,000. Total issuance costs were therefore $663,406, which were charged to additional paid-in capital.
During 2000, the Company issued 5,100 shares of its common stock for an ascribed value of $2.50 per share in exchange for services. The ascribed amount was determined to be fair value at the date of the transaction.
Common Stock Warrants  — As mentioned above, in 2000, the Company committed to issue a warrant to purchase 192,544 shares of common stock that had a fair value of $271,000. The fair value was determined using the Black-Scholes option-pricing model (including the following assumptions: life of six years (full term), volatility of 50% and a risk-free rate of interest of 6.5%). Accordingly, approximately $271,000 was included as a cost of the sale of common stock in 2000 and was included in additional paid-in capital.
During 2002, the Company issued warrants with a two-year exercise period to purchase 203,704 shares of the Company’s common stock to two officers who are also members of the Board of Directors in connection with two notes payable due to these individuals (see Note 6).
In connection with the issuance of the Series B, the holders of Series B received warrants to purchase 2,146,520 shares of common stock at $0.66 per share (“Series B Warrants”). The Series B Warrants were to expire on the earlier of the consummation of a qualified financing (as defined) or five years from date of issuance. The fair value of the Series B Warrants at the date of grant was determined to be approximately $211,000 using the Black-Scholes option-pricing model (including the following assumptions: life of five years (full term), volatility of 70% and a risk-free rate of interest of 3.07%). Accordingly, approximately $211,000 of the net proceeds from the sale of the Series B was subtracted from the carrying value of the Series B and recorded as an increase to additional paid-in capital.
In connection with the issuance of Series C in 2005, the Series B Warrants were modified so as to not allow the Series B Warrants to expire pursuant to the original terms. The amendment also irrevocably waived the termination provision for any future financings so that the warrants will only expire five years from the date of issuance in 2004. As a result of this modification, the Company determined the fair value of the warrants immediately before and after the modification using the Black-Scholes option-pricing model (including the following assumptions: life of zero and four years (remaining terms), respectively, volatility of 68% and a risk-free rate of interest of 2.99%). Accordingly, the

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
incremental value of $560,000 was subtracted from the carrying value of the Series C and recorded as an increase to additional paid-in capital.
In 2005 the Company issued a warrant to purchase 99,010 shares of the Company’s common stock to its placement agent in connection with the issuance of the Series C. The warrant is exercisable for five years at an exercise price of $1.01 per share. The fair value of the warrants at the date of grant was determined to be approximately $24,000 using the Black-Scholes option-pricing model (including the following assumptions: life of five years (full term), volatility of 67% and a risk-free rate of interest of 4.17%). Accordingly, approximately $24,000 was included as an issuance cost of the Series C in 2005 and was included in additional paid-in capital.
Common Stock Anti-Dilution Rights  — The sale of common stock in 2000 included certain stockholder rights. Pursuant to the agreement with these stockholders, in the next offering in which the cumulative amount raised by the Company equaled at least $10 million (the “Qualified Financing”), if (i) the average per-share purchase price of the common stock sold in such Qualified Financing was less than $2.50 or (ii) the average per-share purchase price of the preferred stock sold in such Qualified Financing divided by the number of shares of common stock into which each share of preferred stock may be converted was less than $2.50, then those investors purchasing the common stock in 2000 had a right to receive the number of shares of common stock necessary to reduce their average per-share purchase price to the average per-share purchase price in the Qualified Financing. In 2002, to settle its obligations pursuant to this agreement, the Company issued 10,057,700 shares of common stock to these stockholders and recorded par value of the stock as an increase in common stock and a reduction in additional paid-in capital.
Registration Rights. In 1997, the Company entered into a Principal Stockholders Agreement with each of the six founding stockholders (at June 30, 2005 only one is currently employed by the Company). These agreements provided, in part, that if at any time during the succeeding 10 year period, the Company registered any of its common stock in a public offering either for the Company’s account or for the account of selling stockholders, the Company will use its best efforts to include in such registration all or any part of the capital stock such individual requests to be registered, subject to certain limitations. At December 31, 2004 and June 30, 2005, total shares of common stock subject to these rights equal 4,912,480. Additionally, the employment agreements for several executive officers of the Company provide that they shall each have piggyback registration rights for shares held by them equal to the most favorable piggyback registration rights granted by the Company to its stockholders. Accordingly, these executive officers have the same piggyback registration rights. The shares of common stock subject to these rights at December 31, 2004 and June 30, 2005 were 18,146,701.

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
Reserved Shares  — The following is a summary of common stock reserved for the following identified purposes at December 31, 2004 and June 30, 2005:
                 
    December 31,   June 30,
    2004   2005
         
        (Unaudited)
Conversion of Series A Redeemable Convertible Preferred Stock
    27,591,769       29,434,273  
Conversion of Series B Redeemable Convertible Preferred Stock
    11,252,490       11,520,805  
Conversion of Series C Redeemable Convertible Preferred Stock
          28,661,389  
Warrants on common stock
    2,339,064       2,438,074  
Common stock options
    11,024,006       10,516,865  
             
      52,207,329       82,571,406  
             
10. COMMITMENTS AND CONTINGENCIES
Development and Manufacturing Agreement  — In June 2004, the Company entered into a development and manufacturing agreement with a third party to produce materials for the Company’s clinical trials. The agreement provides for the Company to make certain minimum payments, milestone payments and payments for materials to be used in the clinical trials. The agreement currently expires on December 31, 2006, as amended, unless extended by mutual agreement of the parties. Amounts incurred are expensed as research and development in the accompanying consolidated statements of operations. For the year ended December 31, 2004 and for the six months ended June 30, 2004 and 2005, the Company has expensed $1,168,800, $480,576, and $556,839, respectively, as research and development pursuant to this agreement. As of December 31, 2004 and June 30, 2005, the Company has included in either accounts payable or accrued expenses in the accompanying consolidated balance sheets an aggregate of $633,861 and $393,036, respectively, pursuant to this agreement. The Company’s minimum obligation as of December 31, 2004 is approximately $400,000, all of which is expected to be paid in 2005.
Licensing Agreements  — The Company has exclusively licensed certain of its patent rights from third parties, as well as related parties, including certain members of the Board of Directors and the Company’s Advisory Board, who are also stockholders of the Company. In exchange for the exclusive rights, the Company is obligated to pay the licensor patent expenses and a royalty on net sales of future products ranging from 1% to 4% of net sales, depending on the license agreement. There have been no sales of products subject to such license agreements through December 31, 2004 and June 30, 2005. In addition, some of the license agreements require the Company to pay certain lump sum payments upon attainment of certain clinical milestones, none of which has been achieved as of December 31, 2004 and June 30, 2005. In addition, in exchange for access to non-patent, confidential clinical information from one of the third parties on one of its potential products, the Company has entered into an agreement with this third party which requires the Company to pay the third party a royalty which ranges from 2% to 7% on net sales of a defined future product for the first indication, depending on the extent to which the third party’s clinical data expedites U.S. regulatory approval of the defined product. There have been no sales of product as of December 31, 2004 and June 30, 2005.
Two of the Company’s license agreements are with Georgetown University. In addition to royalty obligations which are included in the above, the agreements provide for the Company to pay up to

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Table of Contents

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
$1.7 million upon the attainment of certain approvals in the regulatory process. Such milestone payments may be reduced by up to 50% for subsequent new drug applications submitted for new uses of the same compound, if paid, would be creditable against future royalty payments. The Company was not obligated for any payments to Georgetown University as of December 31, 2004 or June 30, 2005.
Operating Leases  — The Company rents laboratory and office space located in Cambridge, Massachusetts, under a noncancelable operating lease. The lease terminates in June 2008 and does not contain an option to renew. The lease agreement provides that the Company pay fixed monthly rental payments of $11,749. Total rent expense, including amortization of a deferred rent liability, under these arrangements was $114,993, $123,582 and $126,873 in 2002, 2003 and 2004, respectively. Total rent expense in 2004 includes $45,140 of amortized deferred rent pursuant to costs for leasehold improvements paid by the landlord — see Note 4.
The Company leases an apartment for an officer at a cost of approximately $2,000 per month pursuant to a renewable 1-year lease (expiring in May 2008, as amended).
At December 31, 2004, minimum annual rental payments, which exclude the effects of deferred rent, were as follows:
         
Year   Amount
     
2005
  $ 151,482  
2006
    140,982  
2007
    140,982  
2008
    70,491  
       
    $ 503,937  
       
In addition to the above minimum annual amounts, the Company pays the landlord for taxes and common area usage. These contingent rental payments flucutuate during the term of the lease and, as of December 31, 2003, the approximate annual aggregate amount is $16,000.
Subsequent to December 31, 2004, the Company amended its laboratory and office lease to add space. The amendment provides for an increase in the minimum annual obligation by approximately $84,000. There were no other changes made to the lease terms.
Employment Agreements  — The Company has employment agreements with its officers that continue until terminated in accordance with the provisions of the agreements. Pursuant to the terms, the officers will receive annual base salaries. The base salaries are adjusted annually and, as adjusted, aggregate approximately $1 million for calendar years after December 31, 2004. The officers are also eligible to earn bonuses based on the discretionary accomplishment of goals set by the Board of Directors. Either the Company or the officer may terminate their employment agreement at any time, with or without cause. In the event the Company terminates the employment agreement without cause or the officer terminates his employment for good reason, as defined, the officer may be entitled to receive severance pay up to one year’s base salary. In addition, each agreement provides that in the event of a change in control of the Company, as defined, any unvested options that the officer may hold will become immediately vested and exercisable. The total of such unvested options as of December 31, 2004 and June 30, 2005 was 3,111,169 and 2,772,948, respectively.

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
Employee Benefit Plan  — Effective January 1, 2001, the Company adopted an employee savings and retirement plan, or 401(k) plan (the “Plan”), that covers all employees of the Company who meet certain defined requirements. Under the terms of the Plan, employees may elect to make tax-deferred contributions through payroll deductions within statutory and plan limits. The Company may elect to make discretionary matching contributions to the Plan, but has not made any since plan inception through December 31, 2004 and June 30, 2005.
Litigation  — On June 30, 2004 a small group of stockholders comprised of David Elmaleh, Havacom, N.V., IBS Turnaround Fund, L.P., John Pattillo and Greg Shoukimas commenced a civil suit in Massachusetts Superior Court against the Company and certain of our present and former officers. The complaint alleges that the officers breached fiduciary duties to us and to the plaintiffs by approving and benefiting from stock transactions in 2001 and 2002. The plaintiffs allege that these transactions resulted in the Company receiving less money in connection with the sale of stock and in an improper dilution of certain stockholders. In March 2005, the individual defendants moved for a dismissal of the claims asserted directly against them. On July 1, 2005, the Court found, as a matter of law, that the individual defendants did not breach their fiduciary duties to the plaintiffs and dismissed those claims, leaving only the derivative claims purportedly asserted on behalf of the Company pending. On October 11, 2005 the plaintiffs served a Motion for Reconsideration of the Court’s dismissal of their direct claims. There has been no Court action on this motion.
Promptly after receiving notice of the service of the complaint, the disinterested members of our Board of Directors appointed a Special Litigation Committee (“SLC”), comprised of disinterested directors to investigate the allegations. The SLC has retained independent counsel to assist it in its investigation. On July 14, 2005, the SLC unanimously determined that the transactions in question were proper and submitted a report to the remaining disinterested members of the Board of Directors with its conclusions and the recommendation that the Company seek to terminate the remaining claims. On July 24, 2005, the remaining disinterested members of the Board of Directors adopted the report and its recommendations. On August 9, 2005, the Company’s counsel served a motion to dismiss the remaining derivative claims on plaintiffs and the Company await Court action on this motion.
Pursuant to indemnification agreements between the Company and its officers and directors, legal fees for the present and former officers against which the action has been asserted, are being paid by the Company.
The Company has not accrued for any losses related to these claims as management believes no loss will be sustained as a result of litigation.
11. OTHER RELATED-PARTY TRANSACTIONS AND RELATIONSHIPS
Certain related party transactions are described in Notes 3, 6, 8, 9 and 10. The following are other related party transactions.
During 2002, 2003, 2004, and for the six months ended June 30, 2004 and 2005, the Company expensed $203,000, $60,000, $126,000, $30,000 and $120,000, respectively, pursuant to consulting arrangements with members of the Board of Directors. In 2003, approximately $79,000 of the amounts owed to one of these directors was converted into 1,466 shares of Series A based on $54 per share, the last price paid for the securities by independent investors. In 2004, approximately $111,000 of the amounts owed to one of these directors was converted into 841 shares of Series B based on

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
$132 per share, the last price paid for the securities by independent investors (see Note 8). These arrangements, in addition to remuneration for acting as a member of the Board of Directors, compensated each party for medical and scientific research and financial and administrative services toward furthering the Company’s development.
Mr. David Barlow became Chairman of the Company’s Board of Directors in 2000 and Chief Executive Officer in 2003. During this period and continuing, Mr. Barlow’s brother has been a partner in the law firms representing the Company as legal counsel. Mr. Barlow’s brother has not provided any direct service to the Company. During the years ended December 31, 2002, 2003 and 2004 and for the six months ended June 30, 2004 and 2005 fees due to such firms (including costs related to the issuances of capital stock) were $185,019, $83,565, $410,867, $132,727 and $549,509, respectively.
Combining the above mentioned consulting arrangements and legal fees paid to related parties with the stock-based compensation to related parties as described in Note 3, the total charges to expense for related parties is as follows:
                                                   
                        Period From
                    January 10, 1997
                Six Months   (Date of
                Ended June 30,   Inception)
                    Through
    2002   2003   2004   2004   2005   June 30, 2005
                         
                (Unaudited)   (Unaudited)   (Unaudited)
Research and development — related parties
                                               
 
Stock based compensation
  $ (3,398 )   $ 13,855     $ 23,156     $ 11,578     $ 21,876     $ 55,489  
 
Consulting fees
    103,000       60,000       60,000       30,000       75,000       694,250  
                                     
    $ 99,602     $ 73,855     $ 83,156     $ 41,578     $ 96,876     $ 749,739  
                                     
General and administrative — related parties
                                               
 
Stock based compensation
  $     $     $     $     $     $  
 
Consulting fees
    100,000       79,166       66,000             45,000       290,166  
 
Legal fees
    128,248       29,283       345,060       66,920       359,108       861,699  
                                     
    $ 228,248     $ 108,449     $ 411,060     $ 66,920     $ 404,108     $ 1,151,865  
                                     
In 1999 and 2000, prior to the acquisition of BTI, the Company provided management services to BTI and received $223,334 of income that was recorded as other income.
Included in accrued expense — related parties in the accompanying consolidated balance sheets is the following:
                         
    As of December 31,   As of June 30,
         
    2003   2004   2005
             
            (Unaudited)
Consulting
  $ 317,970     $ 16,515     $ 31,161  
Legal
    2,296       161,481       200,303  
                   
    $ 320,266     $ 177,996     $ 231,464  
                   

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MOLECULAR INSIGHT PHARMACEUTICALS, INC.
(A Development Stage Company)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
(Information as of June 30, 2005, for the Six Months Ended June 30, 2004 and 2005
and for the Period From January 10, 1997 (date of inception) Through June 30, 2005 is Unaudited)
12. SUBSEQUENT EVENTS
In October 2005, the Company purchased, under an Asset Purchase Agreement, the remaining 36.4% share of its 63.6%-owned subsidiary ATP in exchange for certain records and contractual rights maintained by the Company. ATP has no currently licensed intellectual property and has closed out its Phase 1 clinical trial with the FDA. The Company intends to liquidate the subsidiary due to its inactive status.
On September 30, 2005, the Company entered into a $5 million Loan and Security Agreement (“Loan Agreement”) with Ritchie Multi-Strategy Global, LLC. The debt will be used for working capital and general corporate activities. The obligations are secured by a first priority security interest in the Company’s assets and intellectual property. The Company is required to pay interest only during the first three months of the term of the loan, and thereafter the entire loan will amortize over 35 months with equal monthly principal and interest payments. The interest rate of the loan is the lesser of (i) 395 basis points above the yield on the three-year U.S. Treasury Notes on the closing date of the loan and (ii) the maximum rate permitted by law. In addition, we are required to pay Ritchie Multi-Strategy Global, L.L.C a fee in the amount of $250,000 if the Company completes an initial public offering prior to June 30, 2006 (thereafter, the fee would be in the amount of $300,000).
13. UNAUDITED QUARTERLY FINANCIAL DATA
The following table presents unaudited quarterly financial data of the Company. The Company’s quarterly results of operations for these periods are not necessarily indicative of future results of operations.
                                   
                Basic and Diluted
                Net Loss Per
            Net Loss   Share
    Revenue Under       Attributable to   Attributable to
    Research and       Common   Common
    Development Grants   Net Loss   Stockholders   Stockholders
                 
Year Ended December 31, 2003
                               
 
First Quarter
  $ 18,726     $ (859,709 )   $ (990,549 )   $ (0.05 )
 
Second Quarter
    176,272       (1,203,510 )     (1,353,818 )     (0.06 )
 
Third Quarter
    224,164       (600,646 )     (750,954 )     (0.04 )
 
Fourth Quarter
    304,313       (683,862 )     (865,302 )     (0.04 )
Year Ended December 31, 2004
                               
 
First Quarter
    141,725       (1,121,200 )     (1,422,334 )     (0.07 )
 
Second Quarter
    106,170       (2,133,683 )     (2,470,681 )     (0.11 )
 
Third Quarter
    124,740       (2,589,134 )     (2,926,132 )     (0.13 )
 
Fourth Quarter
    196,638       (2,471,386 )     (2,808,388 )     (0.12 )
Year Ended December 31, 2005
                               
 
First Quarter
    267,846       (3,250,119 )     (4,159,350 )     (0.17 )
 
Second Quarter
    159,116       (3,228,435 )     (4,029,471 )     (0.16 )

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                                                Shares
MOLECULAR INSIGHT PHARMACEUTICALS, INC.
Common Stock
(MOLECULARINSIGHT PHARMACEUTICALS LOGO)
 
PROSPECTUS
 
Until                               all dealers that effect these transactions in these securities, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the dealer’s obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.
Piper Jaffray SG Cowen & Co.
Oppenheimer & Co. Roth Capital Partners, LLC


Table of Contents

PART II
INFORMATION NOT REQUIRED IN PROSPECTUS
Item 13.     Other Expenses of Issuance and Distribution.
The following table sets forth the costs and expenses, other than underwriting discounts and commissions, payable by the registrant in connection with the sale of our common stock being registered. All amounts are estimates, except for the Securities and Exchange Commission registration fee, the NASD filing fee and the Nasdaq National Market listing fee. All of these costs and expenses will be borne by the registrant.
         
Securities and Exchange Commission filing fee
  $ 6,768  
NASD filing fee
  $ 6,250  
Nasdaq National Market listing fee
       
Blue Sky fees and expenses
       
Transfer agent and Registrar expenses and fees
       
Printing and engraving expenses
       
Accountants’ fees and expenses
       
Legal fees and expenses
       
Directors and officers insurance premium
       
Road Show
       
Miscellaneous
       
       
Total
  $    
Item 14.     Indemnification of Directors and Officers.
We are a Massachusetts corporation. Section 2.02 of the Massachusetts Business Corporation Act, or MBCA, permits a corporation to eliminate or limit the personal liability of a director for monetary damages for violations of the director’s fiduciary duty, except for (i) any breach of the director’s duty of loyalty to the corporation or its stockholders, (ii) acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) for authorizing unauthorized distributions and for making loans to directors, officers and certain shareholders pursuant to Section 6.40 of the MBCA or (iv) any transaction from which a director derived an improper personal benefit.
Section 8 of the MBCA provides that a corporation may indemnify directors, officers, employees and other agents and persons who serve at its request as directors, officers, employees or agents of another organization or who serve at its request in any capacity with respect to any employee benefit plan, to the extent specified or authorized by the articles of organization, any bylaw adopted by the stockholders or a vote adopted by the holders of a majority of the shares of stock entitled to vote on the election of directors.
Such indemnification may include payment by the corporation of expenses incurred in defending a civil or criminal action or proceeding in advance of the final disposition of such action or proceeding, upon receipt of any undertaking by the person indemnified to repay such payment if he shall be adjudicated to be not entitled to indemnification under Section 8 which undertaking may be accepted without reference to the financial ability of such person to make repayment. Any such indemnification may be provided although the person to be indemnified is no longer an officer, director, employee or agent of the corporation or of such other organization or no longer serves with respect to such employee benefit plan. No indemnification shall be provided, however, for any person with respect to any matter where there is a court determination that such person, in the matter in question, did not act in good faith in the reasonable belief that his action was in the best interest of the corporation or, to the extent

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that the matter relates to service with respect to an employee benefit plan, that such person did not act in the best interest of the participants or beneficiaries of such employee benefit plan.
We have also adopted provisions in our Restated Articles of Organization providing that our directors, officers, employees, and agents shall be indemnified to the fullest extent permitted by Massachusetts law. Additionally, the Amended and Restated Bylaws permit us to secure insurance on behalf of any officer, director, employee, or other agent for any liability arising out of his or her actions in connection with their services to us, regardless of whether our articles or incorporation or bylaws permit such indemnification. We have obtained such insurance.
In addition to the indemnification granted to officers and directors under the MBCA, Article VI of our Restated Articles of Organization provides that each person who was or is made a party or is threatened to be made a party to or is otherwise involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he or she is or was a director or an officer of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other enterprise, including service with respect to an employee benefit plan, whether the basis of such proceeding is alleged action in an official capacity as a director, officer, employee or agent or in any other capacity while serving as a director, officer, employee or agent, shall be indemnified and held harmless by the corporation to the fullest extent authorized by the MBCA, as the same exists or may hereafter be amended against all expense, liability and loss (including attorneys’ fees, judgments, fines, ERISA excise taxes or penalties and amounts paid in settlement) reasonably incurred or suffered by such indemnitee in connection therewith.
The right to indemnification conferred in our Restated Articles of Organization includes, in the case of a director or officer at the level of vice president or above, and in the case of any other officer or any employee may include (in the discretion of the Board of Directors), the right to be paid by the Company the expenses incurred in defending any such proceeding in advance of its final disposition. The rights to indemnification and to the advancement of expenses conferred in our Restated Articles of Organization continue as to an indemnitee who has ceased to be a director, officer, employee or agent and inure to the benefit of the indemnitee’s heirs, executors and administrators.
We have entered into separate indemnification agreements with our directors and executive officers, in addition to the indemnification provided for in our articles of organization and bylaws. These agreements, among other things, provide that we will indemnify our directors and executive officers for any and all expenses, including attorneys’ fees, judgments, witness fees, damages, fines, and settlement amounts incurred by a director or executive officer in any action or proceeding arising out of their services as one of our directors or executive officers, or any of our subsidiaries or any other company or enterprise to which the person provides services at our request. We believe that these provisions and agreements are necessary to attract and retain qualified persons as directors and executive officers.
There is pending litigation involving two of our directors and officers as to which indemnification is being provided pursuant to our by-laws. See “Business — Legal Proceedings”. There is no other pending litigation or proceeding involving our directors, officers, employees or agents pending for which indemnification is sought, nor are we aware of any pending or threatened litigation that may result in claims for indemnification by any director, officer, employee or other agent.

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Item 15.     Recent Sales of Unregistered Securities.
In the last three years, we have sold the following securities which were not registered under the Securities Act of 1933:
        1. We did not sell any securities during 2002. On December 9, 2002 we issued                     shares of our common stock pursuant to anti-dilution rights held by a total of 6 investors who had previously purchased shares of common stock from us in 2000. With the issuance of these common shares, the anti-dilution rights of these investors were terminated. During 2002, we accepted advance subscriptions for our Series A Preferred Stock, which was not issued until 2003, as described below.
 
        2. During 2003, we issued and sold a total of 120,317 shares of our Series A Preferred Stock to a total of 37 investors in private placements. Those shares of Series A Preferred Stock for which advance subscriptions were received prior to July 2002 and were issued on January 6, 2003 were sold for $70 per preferred share. Those shares of Series A Preferred Stock for which subscriptions were received on or after July 2002 and issued from January 30, 2003 through December 2003 were sold for $54 per preferred share. Each share of preferred stock converts to common stock on a                     -to-1 basis and the price per share, on a common stock equivalent basis, was $          and $          , respectively, per common stock equivalent.
 
        3. On May 20, 2003, we issued                     shares of common stock to David Barlow upon the exercise of an option by Mr. Barlow. The option exercise price was $           per share and the aggregate purchase price was paid by a payment of $32,850 in cash and the balance by a non-interest bearing promissory note in the amount of $295,650. On November 4, 2005, Mr. Barlow repaid this loan in full by paying to the Company $295,650 in cash. See discussion in note 3 of our audited consolidated financial statements relating to the accounting treatment pertaining to the repayment of this loan. Certain of these shares of common stock are subject to forfeiture based upon vesting provisions in a Stock Restriction Agreement.
 
        4. From March 4, 2004 through June 30, 2004, we issued a total of 53,663 shares of our Series B Convertible Preferred Stock to 33 investors in a private placement for $132 per preferred share. Each share of preferred stock converts to common stock on a                     -to-1 basis and the price per share, on a common stock equivalent basis, was $           per common stock equivalent. In connection with the sale of these shares of Series B preferred stock, each investor was issued a warrant to purchase that number of shares of common stock equal to 20% of the aggregate dollar amount invested divided by $          , the warrant exercise price. This resulted in warrants being issued for the purchase of a total of                     shares of common stock at an exercise price of $           per common share. These warrants will expire, if not exercised, in connection with this offering.
 
        5. During 2004, we issued                     shares of our Common Stock pursuant to option exercises. The options were previously granted pursuant to our 1997 Stock Option Plan.
 
        6. In June 2004, we issued                     shares of our Common Stock to James Poitras pursuant to his exercise of a warrant to purchase common shares. The exercise price was $           per share. The warrant had been issued in connection with a prior investment in the Company by Mr. Poitras.
 
        7. In August 2004, we issued                     shares of our Common Stock to David Barlow pursuant to his exercise of a warrant to purchase common shares. The exercise price was $           per share. The warrant had been issued in connection with a prior investment in the Company by Mr. Barlow.
 
        8. From March 29, 2005 through April 14, 2005, we issued and sold a total of 141,590 shares of our Series C Convertible Preferred Stock to 45 investors in a private placement for $202

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  per preferred share. Each share of preferred stock converts to common stock on a                     - to-1 basis and the price per share, on a common stock equivalent basis, was $           per common stock equivalent.
 
        9. In April 2005 the Company issued a warrant to purchase an aggregate of                     shares of common stock at an exercise price of $          to S.G. Cowen & Co., an accredited investor, for services rendered in connection with the sale of our Series C Preferred Stock.
 
        10. To date in 2005, the Company has issued                     shares of its Common Stock pursuant to option exercises. The options were previously granted pursuant to our 1997 Stock Option Plan.

We claimed exemption from registration under the Securities Act for the sales and issuances of securities in the transactions described in paragraphs 2, 3 and 7 above by virtue of Section 4(2) of the Securities Act and by virtue of Rule 506 of Regulation D. Such sales and issuances did not involve any public offering, were made without general solicitation or advertising and each purchaser was an accredited investor with access to all relevant information necessary to evaluate the investment and represented to us that the shares were being acquired for investment. The recipients of securities in each of these transactions represented their intention to acquire the securities for investment only and not with view to or for sale in connection with any distribution thereof. Appropriate legends were affixed to the share certificates and instruments issued in all such transactions.
We claimed exemption from registration under the Securities Act for the sales and issuances of securities in the transactions described in paragraphs 4, 8 and 10 above by virtue of Rule 701 promulgated under the Securities Act, in that they were offered and sold either pursuant to written compensatory plans or pursuant to a written contract relating to compensation, as provided by Rule 701. The recipients of securities in each of these transactions represented their intention to acquire the securities for investment only and not with view to or for sale in connection with any distribution thereof and appropriate legends were affixed to the share certificates and instruments issued in such transactions. All recipients had adequate access, through their relationships with us, to information about us.
We claimed exemption from registration under the Securities Act for the sales and issuances of securities in the transactions described in paragraphs 1, 5, 6 and 9 above by virtue of Section 4(2) of the Securities Act. Such sales and issuances did not involve any public offering, were made without general solicitation or advertising and each purchaser was an accredited investor with access to all relevant information necessary to evaluate the investment and represented to us that the shares were being acquired, or the shares issuable pursuant to warrant exercise would be acquired, for investment purposes only and not with a view to or for sale in connection with any distribution thereof.
Item 16.     Exhibits and Financial Statement Schedules.
             
Number       Description of Document
         
  1 .1       Form of Underwriting Agreement*
  3 .1       Form of Restated Articles of Organization.*
  3 .2       Form of Restated Bylaws.*
  4 .1       Reference is made to Exhibits 3.1 and 3.2
  4 .2       Form of Common Stock Certificate.*
  5 .1       Opinion of Foley & Lardner LLP.*
  10 .1       Unit Purchase Agreement for the Purchase of Shares of Series B Preferred Stock of the Company dated as of February 23, 2004
  10 .2       Stock Purchase Agreement for the Purchase of Series C Preferred Stock of the Company dated as of March 29, 2005

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Number       Description of Document
         
  10 .3       Amended and Restated Voting Agreement by and among the Company and certain holders of Common Stock and Series A Preferred Stock, the holders of Series B Preferred Stock and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .4       Investors Rights Agreement by and between the Company and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .5       Registration Rights Agreement by and among the Company and certain holders of Common Stock and Series A Preferred Stock, the holders of Series B Preferred Stock and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .6       Lease Agreement dated as of June 19, 2003 by and between the Company and RayJoe Limited Partnership
  10 .7       Employment Agreement dated as of January 1, 2003 by and between the Company and John Babich
  10 .8       Employment Agreement dated as of February 7, 2003 by and between the Company and David Barlow
  10 .9       Employment Agreement dated as of March 3, 2003 by and between the Company and John McCray
  10 .10       Employment Agreement dated as of May 1, 2004 by and between the Company and Nicholas Borys.
  10 .11       Employment Agreement dated as of July 1, 2005 by and between the Company and Bob Gallahue.
  10 .12       License Agreement, dated as of October 25, 1999, between the Company and Nihon Medi-Physics Co. Ltd. †
  10 .13       Development, Manufacturing and Supply Agreement, dated June 14, 2004, as amended, between the Company and MDS Nordion, a division of MDS (Canada) Inc. †
  10 .14       Exclusive License Agreement, dated as of December 29, 1997, between the Company and Georgetown University. †
  10 .15       Exclusive License Agreement, dated as of March 1, 2000, between the Company and Georgetown University. †
  10 .16       License Agreement, dated as of December 15, 2000, between the Company and The Board of Governors of the University of Western Ontario. †
  10 .17       License Agreement, dated as of September 5, 2003, between the Company and The Board of Governors of the University of Western Ontario. †
  10 .18       1997 Stock Option Plan
  10 .19       Molecular Insight Pharmaceuticals 2005 Equity Incentive Plan*
  23 .1       Consent of Deloitte & Touche LLP
 
  * To be filed by amendment
  Portions of this exhibit have been omitted and filed separately with the secretary of the Securities and Exchange Commission pursuant to a confidential treatment request
All financial statement schedules have been omitted because they are inapplicable or not required and because the information is included elsewhere in the consolidated financial statements or notes thereto.
Item 17.     Undertakings.
The undersigned registrant hereby undertakes to provide to the underwriters at the closing specified in the underwriting agreement certificates in such denominations and registered in such names as required by the underwriters to permit prompt deliver to each purchaser.

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The undersigned registrant hereby undertakes that:
        (1) For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.
 
        (2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, The Commonwealth of Massachusetts, on the 8th day of November, 2005.
  MOLECULAR INSIGHT PHARMACEUTICALS, INC.
 
  By: /s/ David S. Barlow
 
 
  David S. Barlow
  Chairman and Chief Executive Officer
Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated. Each person whose signature appears below constitutes and appoints David S. Barlow and John E. McCray and each of them individually, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this registration statement and any Rule 462(b) registration statement and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or either or them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
             
Signature   Title   Date
         
By:
  /s/ David S. Barlow
 
David S. Barlow
  Chief Executive Officer; Chairman of the Board   November 8, 2005
 
By:
  /s/ John Babich, Ph.D.
 
John Babich, Ph.D.
  President; Director   November 8, 2005
 
By:
  /s/ John McCray
 
John McCray
  Chief Operating Officer   November 8, 2005
 
By:
  /s/ Robert Gallahue, C.P.A.
 
Robert Gallahue, C.P.A.
  Chief Financial Officer   November 8, 2005
 
By:
  /s/ Daniel Frank
 
Daniel Frank
  Director   November 8, 2005
 
By:
  /s/ Andrew Jay, D.M.D.
 
Andrew Jay D.M.D.
  Director   November 8, 2005
 
By:
  /s/ William C. Eckelman, Ph.D.
 
William C. Eckelman, Ph.D.
  Director   November 8, 2005
 
By:
  /s/ Harry Stylli, Ph.D.
 
Harry Stylli, Ph.D.
  Director   November 8, 2005
 
By:
  /s/ Kim Lamon, M.D., Ph.D.
 
Kim Lamon, M.D., Ph.D.
  Director   November 8, 2005

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EXHIBIT INDEX
             
Number       Description of Document
         
  1 .1       Form of Underwriting Agreement*
  3 .1       Form of Restated Articles of Organization.*
  3 .2       Form of Amended and Restated Bylaws.*
  4 .1       Reference is made to Exhibits 3.1 and 3.2.
  4 .2       Form of Common Stock Certificate.*
  5 .1       Opinion of Foley & Lardner LLP.*
  10 .1       Unit Purchase Agreement for the Purchase of Shares of Series B Preferred Stock of the Company dated as of February 23, 2004
  10 .2       Stock Purchase Agreement for the Purchase of Series C Preferred Stock of the Company dated as of March 29, 2005
  10 .3       Amended and Restated Voting Agreement by and among the Company and certain holders of Common Stock and Series A Preferred Stock, the holders of Series B Preferred Stock and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .4       Investors Rights Agreement by and between the Company and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .5       Registration Rights Agreement by and among the Company and certain holders of Common Stock and Series A Preferred Stock, the holders of Series B Preferred Stock and the holders of Series C Preferred Stock dated as of March 29, 2005
  10 .6       Lease Agreement dated as of June 19, 2003 by and between the Company and RayJoe Limited Partnership
  10 .7       Employment Agreement dated as of January 1, 2003 by and between the Company and John Babich
  10 .8       Employment Agreement dated as of February 7, 2003 by and between the Company and David Barlow
  10 .9       Employment Agreement dated as of March 3, 2003 by and between the Company and John McCray
  10 .10       Employment Agreement dated as of May 1, 2004 by and between the Company and Nicholas Borys.
  10 .11       Employment Agreement dated as of July 1, 2005 by and between the Company and Bob Gallahue.
  10 .12       License Agreement, dated as of October 25, 1999, between the Company and Nihon Medi-Physics Co. Ltd.†
  10 .13       Development, Manufacturing and Supply Agreement, dated June 14, 2004, as amended, between the Company and MDS Nordion, a division of MDS (Canada) Inc.†
  10 .14       Exclusive License Agreement, dated as of December 29, 1997, between the Company and Georgetown University.†
  10 .15       Exclusive License Agreement, dated as of March 1, 2000, between the Company and Georgetown University.†
  10 .16       License Agreement, dated as of December 15, 2000, between the Company and The Board of Governors of the University of Western Ontario.†
  10 .17       License Agreement, dated as of September 5, 2003, between the Company and The Board of Governors of the University of Western Ontario.†
  10 .18       1997 Stock Option Plan
  10 .19       Molecular Insight Pharmaceuticals 2005 Equity Incentive Plan*
  23 .1       Consent of Deloitte & Touche LLP
 
 * To be filed by amendment
 † Portions of this exhibit have been omitted and filed separately with the secretary of the Securities and Exchange Commission pursuant to a confidential treatment request

Exhibit 10.1

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

Up to 61,000 Shares of Series B Preferred Stock

and

Warrants to Purchase Shares of Common Stock

UNIT PURCHASE AGREEMENT
dated as of February 23, 2004


UNIT PURCHASE AGREEMENT

THIS AGREEMENT is by and between Molecular Insight Pharmaceuticals, Inc. (the "Company"), a Massachusetts corporation with principal offices at 160 Second Street, Cambridge, Massachusetts 02142, and each of the purchasers set forth on Schedule I attached hereto (each a "Purchaser" and together the "Purchasers").

IN CONSIDERATION of the mutual covenants contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties agree as follows:

1. AUTHORIZATION OF SALE OF UNITS. Prior to the Closing (as defined in
Section 3 below), the Company will have authorized the sale of Units where each Unit (a "Unit") shall consist of (i) that number of shares of Series B Preferred Stock, $0.01 par value per share, of the Company (the "Preferred Shares") equal to the aggregate amount purchased by such Purchaser divided by $132.00 per Preferred Share and (ii) a five-year Warrant (the "Warrant") to purchase shares of Common Stock, $0.01 par value per share, of the Company (the "Common Shares") where such number of shares of Common Stock subject to the Warrant are equal to
(x) 0.20 times (y) the aggregate dollar amount of Preferred Shares purchased by such Purchaser divided by the Warrant Price set forth therein. The Warrant shall be substantially in the form of Exhibit 1 attached hereto and shall have an exercise price per share equal to $0.66 per share. Prior to the Closing, the Company will have authorized the sale of Units where the maximum number of Preferred Shares purchased pursuant to such Units is 61,000 shares of Preferred Shares for an aggregate purchase price of $8,052,000 and such sale may be consummated in one or more transactions pursuant to Section 2 below. The Purchasers acknowledge and agree that, prior to the Closing, the Company must hold a meeting of its stockholders to approve the Amendment to the Articles of Organization in substantially the form attached hereto as Exhibit 2 (the "Amendment") and, upon approval from the stockholders, file such Amendment with the Secretary of State for the Commonwealth of Massachusetts. Upon execution of this Agreement, the Company will promptly call such stockholders meeting in accordance with its charter documents and the laws of the Commonwealth of Massachusetts. The Closing shall not occur until such Amendment is filed with the Secretary of State for the Commonwealth of Massachusetts.

2. AGREEMENT TO SELL AND PURCHASE UNITS. Subject to the terms and conditions of this Agreement, at the Closing (as defined below) the Company shall sell and issue to the Purchasers, and the Purchasers shall purchase from the Company, at a purchase price of $132.00 per Preferred Share being purchased by such Purchaser, payable as set forth in Section 3 hereof, a Unit equal to the number of shares of Preferred Shares set forth opposite the name of such Purchaser on Schedule I attached hereto (the "Initial Shares"), together with a Warrant calculated in the manner set forth in Section 1 above (the Initial Shares and the related Warrants being the "Initial Units"). Additionally, until 5:00 p.m. (Boston time) on June 30, 2004, one or more additional persons (the "Additional Purchasers") may purchase from the Company additional Units (the "Additional Units") consisting of additional shares of Preferred Shares (the "Additional Shares") and additional Warrants on the same terms and conditions as set forth herein, such agreement to be evidenced by the delivery by one or more of the Additional Purchasers to the Company of a counterpart signature page in the form set forth on Schedule II attached hereto and, upon full execution of each such Schedule II by the Company and the applicable Additional Purchaser, Schedule I attached hereto shall be amended to


include the sale of such Preferred Shares under the heading "No. of Additional Shares". The sale by the Company and the purchase by an Additional Purchaser of the Additional Units shall not become effective until the Company receives payment of the aggregate purchase price from such Additional Purchaser. Upon the purchase of such Additional Units, an Additional Purchaser shall be deemed a Purchaser hereunder and shall be subject to and may rely upon the representations and warranties, terms and conditions contained herein. Each of the Purchasers hereby waives any rights such Purchaser may have under this Agreement or the Company's Amendment to receive notice of the sale and issuance of such Additional Units. The Initial Shares, together with the maximum number of Additional Shares purchasable by Additional Purchasers hereunder, shall not exceed 61,000 shares of Series B Preferred Stock in the Company and the Company may issue related Warrants to purchase shares of Common Stock in the Company in accordance with Section 1 herein. Accordingly, the aggregate maximum purchase price of the Units shall be approximately $8,052,000.

3. CLOSING AND DELIVERY OF UNITS. The closing of the sale and purchase of the Initial Units pursuant to this Agreement shall take place at the offices of Epstein, Becker & Green, 111 Huntington Avenue, Boston, Massachusetts 02199 as soon as practicable, but no later than five (5) business days, after the Company's has filed the Amendment with the Secretary of State for the Commonwealth of Massachusetts (the "Closing"). The date of the Closing is hereinafter referred to as the "Closing Date." At the Closing, the Company shall deliver to the Purchasers certificates representing the Initial Shares, in such amounts and registered in such names as set forth on Schedule I attached hereto and the Warrant related thereto. The purchase price for the Units shall be paid by check or wire transfer of immediately available funds to an account designated by the Company. The Company shall deliver to the Purchasers one or more stock certificates representing the Preferred Shares purchased by such Purchaser and a Warrant calculated in a manner set forth in Section 1 above, each such certificate and Warrant to be registered in the name of the Purchaser and delivered against receipt by the Company of a certified or official bank check or checks or wire transfer of funds in the full amount of the purchase price for the Units being purchased hereunder. No more then 0.05% of the aggregate purchase price paid by each Purchaser shall be allocated to the Warrants for such Purchaser.

4. REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE COMPANY. The Company hereby represents and warrants to, and covenants with, the Purchaser as follows:

4.1. Organization. The Company is duly organized, validly existing and in good standing under the laws of the Commonwealth of Massachusetts. The Company has full corporate power and authority to own, operate and occupy its properties and to conduct its business as presently conducted and is registered or qualified to do business and in good standing in each jurisdiction in which it owns or leases property or transacts business and where the failure to be so qualified could be reasonably expected to have a material adverse effect upon the business, financial condition, properties or operations of the Company. Except for: (i) Biostream Therapeutics, Inc., a wholly-owned subsidiary; and
(ii) ATP Therapeutics, Inc., a 63.63% owned subsidiary, the Company does not own, directly or indirectly, any interest in any corporation, association, or other entity. The Company is not a participant in any joint venture, partnership or similar arrangement.

4.2. Due Authorization. The Company has, or will have prior to the Closing, all requisite corporate power and authority to execute, deliver and perform its obligations under this Agreement, and this Agreement has been, or will be prior to the Closing, duly authorized and validly executed and delivered by the Company and will, as of the Closing Date, constitute the legal, valid and binding agreement of the Company enforceable against the Company in accordance with its terms,


except as rights to indemnity and contribution may be limited by state, federal or foreign laws or the public policy underlying such laws, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors' and contracting parties' rights generally and except as enforceability may be subject to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

4.3. Non-Contravention. The execution and delivery of this Agreement, the issuance and sale of the Units to be sold by the Company hereunder, the fulfillment of the terms of this Agreement and the consummation of the transactions contemplated by this Agreement will not (i) conflict with, or constitute a violation of or default (with the passage of time or otherwise) under, any material agreement or instrument to which the Company is a party or by which it is bound, or the charter, by-laws or other organizational documents of the Company, (ii) result in the creation or imposition of any lien, encumbrance, claim, security interest or restriction whatsoever upon any of the material properties or assets of the Company or an acceleration of indebtedness pursuant to any obligation, agreement or condition contained in any material bond, debenture, note or any other evidence of indebtedness or any, material indenture, mortgage, deed of trust or any other agreement or instrument to which the Company is a party or by which it is bound or to which any of the property or assets of the Company is subject, or (iii) conflict with, or result in a violation of, any law, administrative regulation, ordinance or order of any court or governmental agency, arbitration panel or authority applicable to the Company. No consent, approval, authorization or other order of, or registration, qualification or filing with, any regulatory body, administrative agency, or other governmental body is required for the valid issuance and sale of the Units to be sold pursuant to the Agreement, other than such as have been or will be made or obtained by the Closing and other than applicable securities filings that may be made after the issuance and sale of the Units (which will be timely made by the Company).

4.4 Capitalization. Upon adoption of the Amendment, the Company will have a total authorized capitalization consisting of (i) 78,000,000 shares of Common Stock and (ii) 211,000 shares of Preferred Stock, $0.01 par value ("Preferred Stock"), of which 150,000 shares are designated Series A Preferred Stock ("Series A Preferred") and 61,000 shares are designated Series B Preferred Stock ("Series B Preferred"). As of the date hereof; 20,494,444 shares of Common Stock are issued and outstanding and 120,717 shares Series A Preferred are issued and outstanding and, as of the Closing, 15,152 shares of Series B Preferred will be issued and outstanding upon the consummation of the issuance and sale of the Initial Units. The Units to be sold pursuant to this Agreement have been, or will be prior to the Closing, duly authorized, and when issued and paid for in accordance with the terms of this Agreement and the Amendment, will be validly issued, fully paid and non-assessable and free of restrictions on transfer, other than restrictions on its transfer under this Agreement, the Amendment and under applicable state and federal securities laws. The Common Shares to be issued upon exercise of the Warrant will be validly issued, fully paid and non-assessable and free of restrictions on transfer, other than restrictions on their transfer under this Agreement, the Articles of Organization and under applicable state and federal securities laws. The outstanding shares of capital stock of the Company have been duly and validly issued and are fully paid and non-assessable. As of the date hereof up to 13,000,000 shares of Common Stock in total are currently authorized for grants under the Company's stock option plan, of which 11,148,636 shares are subject to outstanding options under the Company's stock option plan. As of the date hereof, 1,851,364 shares are subject to options not granted pursuant to the Company's stock option plan and 396,248 shares of Common Stock reserved for issuance upon the exercise of outstanding warrants, excluding the Warrant to be issued hereunder. Based upon the representations of the Purchasers set forth in
Section 5 herein, the offer, sale and issuance of the Units


as contemplated herein are exempt from the registration requirements of the Securities Act of 1933, as amended, and neither the Company or any authorized agent acting on behalf of the Company will take any action hereafter that would cause the loss of such exemption.

4.5 Governmental Consents. No consent, approval, order or authorization of, or registration, qualification, designation, declaration or filing with, any federal, state or local governmental authority is required on the part of the Company in order to enable the Company to execute, deliver and perform its obligations under this Agreement, except for such qualifications or filings under applicable securities laws as may be required in connection with the transactions contemplated by this Agreement and which may be done after the Closing.

4.6 Litigation. There is no action, suit or proceeding, or governmental inquiry or investigation, pending, or, to the Company's knowledge, threatened against the Company which questions the validity of this Agreement or the right of the Company to enter into it, or which might result, either individually or in the aggregate, in any material adverse change in the business, assets or condition, financial or otherwise, of the Company.

4.7 Financial Statements. The audited financial statements of the Company dated December 31, 2002 (the "Balance Sheet Date") and the unaudited financial statements dated December 31, 2002 (collectively the "Financial Statements") have been previously delivered to the Purchasers or their counsel. Except as otherwise described therein, such Financial Statements (i) are in accordance with the books and records of the Company, (ii) are true, correct and complete and present fairly the financial condition of the Company at the date or dates therein indicated and the results of operations for the period or periods therein specified, and (iii) have been prepared in accordance with U.S. generally accepted accounting principles applied on a consistent basis, except that the unaudited financial statements lack footnotes and remain subject to year-end adjustments.

4.8 Activities Since Balance Sheet Date. Since the Balance Sheet Date, there has not been: (a) any damage, destruction or loss, whether or not covered by insurance, materially and adversely affecting the assets, properties, financial condition, operating results or business of the Company (as presently conducted); (b) any waiver by the Company of a material debt owed to it; (c) any pledge or sale of the Business Intellectual Property (as defined in Section 4.12 below) which is owned by the Company; or (d) to the Company's knowledge, any other event or condition of any character which would materially and adversely affect the assets, financial condition, operating results or business of the Company, except that the Company is currently experiencing substantial negative cash flow each month and expects to continue negative cash flow for the foreseeable future.

4.9 Tax Returns and Payments. The Company has timely filed all tax returns and reports required by law and has not been audited by any state or federal taxing authority. All tax returns and reports of the Company are true and correct in all material respects. The Company has paid all taxes and other assessments shown as due on such returns and reports, except those, if any, currently being contested by it in good faith.

4.10 Insurance. The directors and officers liability insurance policy set forth on Schedule 4.10 attached hereto, a copy of which has been previously provided to the Purchasers or their counsel, is in full force and effect on the date hereof.


4.11 Employee Benefit Plans. Except as set forth on Schedule 4.11 attached hereto, the Company does not have any employee benefit plans as such term is defined in the Employee Retirement Income Security Act of 1974.

4.12 Intellectual Property.

(a) Definitions. For purposes of this Section 4.12, the term "Business Intellectual Property" means the patents, registrations, and applications therefor, including divisions, continuations, continuations-in-part and renewal applications, and including renewals, extensions and reissues set forth on Schedule 4.12 attached hereto (collectively, "Patents") and the written agreements related thereto and set forth on Schedule 4.12.

(b) Except for U.S. Patent No. 4,524,059 which has expired, the Company warrants and represents that all Business Intellectual Property owned by the Company and, to the Company's knowledge, all Business Intellectual Property licensed to the Company and its Subsidiaries (which companies shall be considered as a whole), is valid, subsisting and enforceable.

(c) The Company is not, to its knowledge, violating and has not, to its knowledge, violated, in each case in any material respect, any Business Intellectual Property rights of any Person, and there exists no event, condition or occurrence which, with the giving of notice or lapse of time, or both, would constitute a breach or default by the Company or, to the knowledge of the Company, another Person under any written agreement set forth on Schedule 4.12 the result of which violation would cause the Company's projects under such Intellectual Property Contract to be terminated. No party to any written agreement set forth on Schedule 4.12 has given the Company written notice of cancellation, termination or failure to renew any Intellectual Property Contract.

(e) Except for U.S. Patent No. 4,524,059 which has expired, the Company warrants and represents that there is no suit, action, opposition, cancellation or other proceeding ("Proceeding") pending concerning the Business Intellectual Property owned by the Company or, to the Company's knowledge, the Business Intellectual Property licensed by the Company, including any Proceeding concerning a claim or position that the Business Intellectual Property has been violated or is invalid, unenforceable, unpatentable, unregisterable, cancelable, or not owned or held by the Company. To the Company's knowledge, no such claim has been threatened or asserted in writing.

(f) Except for U.S. Patent No. 4,524,059 which has expired, the Company warrants and represents that it owns or otherwise holds valid rights to use all Business Intellectual Property material to the business of the Company as presently conducted. All rights in and to the Business Intellectual Property owned by the Company are free of all liens and are fully assignable by the Company to any Person, without payment, consent of any Person or other condition or restriction.

4.13 Disclosure. Neither this Agreement, the Voting Agreement, the Amendment, the Warrants or any other written exhibit or schedule attached hereto contains any untrue statement of a material fact or omits to state a material fact necessary in order to make the statements contained herein or therein not misleading.

5. REPRESENTATIONS. WARRANTIES AND COVENANTS OF EACH PURCHASER.

5.1. Investment Representations. Each Purchaser, severally and not jointly, represents and warrants to, and covenants with, the Company that: (i) the Purchaser is an "accredited investor" as


defined in Regulation D under the Securities Act of 1933, as amended (the "Securities Act"), and is knowledgeable and experienced in making investments in private placement transactions such as the purchase of the Units; (ii) the Purchaser is acquiring the Units set forth opposite his name on Schedule I hereto for its own account for investment and with no present intention of distributing the Units or any of the underlying Preferred Shares, Warrants or Common Shares issuable upon exercise of the Warrants, and no arrangement or understanding exists with any other person regarding the distribution of any of such Preferred Shares, Warrants or Common Shares issuable upon exercise of the Warrants; (iii) the Purchaser will not, directly or indirectly, voluntarily offer, sell, pledge, transfer or otherwise dispose of (or solicit any offers to buy, purchase or otherwise acquire or take a pledge of) any of the Preferred Shares, the Warrants or the Common Shares issuable upon exercise of the Warrants except (a) in the event of an effective registration statement under the Securities Act, (b) upon delivery of an opinion of counsel (which shall be in form and substance reasonably satisfactory to the Company) that such registration is not required, unless such sale, transfer or other disposition is made pursuant to Section 144(k) of the Securities Act, in which case no opinion of counsel shall be required or (c) (a) to transfers to a trust established for the benefit of the Purchaser, (b) transfers by the Purchaser to his guardian or conservator or (c) transfers by the Purchaser, in the event of his death, to his executor (s) or administrator (s) or to trustee(s) under his will (collectively, "Permitted Transferees"), provided, however, that in any such event the Preferred Shares so transferred in the hands of each such Permitted Transferee shall remain subject to this Agreement, and each such Permitted Transferee shall so acknowledge in writing as a condition precedent to the effectiveness of such transfer; (iv) for as long as the Preferred Shares included in the Units remaining outstanding, no transfer of the Warrants shall be made by the Purchaser unless such Preferred Shares related to such Warrants are transferred simultaneously therewith to the same third party; (v) the Purchaser has had an opportunity to ask questions and receive answers from the management of the Company regarding the Company, its business and the offering of the Units; and
(vi) if an individual, the Purchaser is resident in the state set forth on the signature page to this Agreement. Nothing herein shall be deemed a representation or warranty by such Purchaser to hold the Units for any specific period of time. Further, notwithstanding clause (v) to the contrary, any inquiries or investigations made by the Purchaser shall not modify, amend or affect such Purchaser's right to rely on the representations, warranties and covenants contained herein.

5.2. Power, Authority, etc. Each Purchaser, severally and not jointly, further represents and warrants to, and covenants with, the Company that (i) the Purchaser has full right, power, authority and capacity to enter into this Agreement to consummate the transactions contemplated hereby and thereby has taken all necessary action to authorize the execution, delivery and performance of this Agreement, and (ii) upon the execution and delivery of this Agreement, this Agreement shall constitute a valid and binding obligation of the Purchaser enforceable in accordance with its terms, except as rights to indemnity and contribution may be limited by state, federal or foreign laws or the public policy underlying such laws, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors' and contracting parties' rights generally and except as enforceability may be subject to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

5.3. No Public Market; Legends. Each Purchaser acknowledges and understands that there is no public market for the Units and the securities compromising the Units and that each Purchaser must bear the economic risk of his investment in the Units and the securities compromising the Units for an indefinite period of time because the Units and the securities comprising the Units have not been registered under the Securities Act. The certificates representing the Preferred Shares and the


Common Shares issued to Purchasers upon exercise of the Warrants will bear a legend in substantially the following form:

THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"). SUCH SECURITIES MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE DISPOSED OF, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER SAID ACT OR AN OPINION OF COUNSEL (WHICH SHALL BE IN FORM AND SUBSTANCE REASONABLY SATISFACTORY TO THE COMPANY) THAT SUCH REGISTRATION IS NOT REQUIRED UNLESS SUCH SALE, TRANSFER OR OTHER DISPOSITION IS MADE PURSUANT TO RULE 144(K) OF THE SECURITIES ACT, IN WHICH CASE NO OPINION OF COUNSEL SHALL BE REQUIRED OR EXCEPT AS OTHERWISE PERMITTED UNDER A CERTAIN STOCK PURCHASE AGREEMENT DATED FEBRUARY 23, 2004 BETWEEN THE COMPANY AND THE ORIGINAL HOLDER, A COPY OF WHICH IS AVAILABLE UPON REQUEST FROM THE COMPANY FOR INSPECTION.

The Company agrees to remove such legend from the certificates representing the Preferred Shares and the shares of Common Stock issued upon exercise of the Warrants at such time as such capital stock may be legally sold under Rule 144 (or any successor rule) without registration under the Securities Act, which legend removal shall be at the request of the Purchaser and upon receipt by the Company from the Purchaser of an opinion of counsel, which shall be in form and substance reasonably satisfactory to the Company, that such legend may be removed. Each Purchaser agrees that any sale, transfer, pledge, hypothecation or other disposition of the Preferred Shares, the Warrants and any shares of Common Stock shall be made in compliance with the requirements of this
Section 5.3 and all applicable securities laws.

5.4. Lock-up Period. Each Purchaser agrees that it shall, if so requested by the Company, enter into an agreement providing that it shall not offer, sell or grant an option for the sale of, or otherwise dispose of, any shares of Common Stock or any securities convertible into or exercisable for shares of Common Stock (including, without limitation, any options, warrants, stock appreciation rights, or similar rights with an exercise or conversion privilege at a price related to, or derived from, the market price of the Common Stock) during the period of one hundred eighty (180) days after the date of any initial public offering of the Company's Common Stock, without the prior written consent of the Company's underwriters for such offering. Notwithstanding anything herein to the contrary, the Purchaser shall only be required to enter into such a lock-up agreement if a majority of the officers, directors and holders of 5% or more of the Company's capital stock also enter into such an agreement.

6. REDEMPTION RIGHTS. The parties hereto acknowledge and agree that the Preferred Shares will be subject to certain redemption rights as set forth in the Amendment.

7. RIGHTS OF FIRST REFUSAL.

(a) Right of First Refusal. The Company shall, prior to any proposed issuance by the Company of any of its securities (other than debt securities with no equity feature), first offer to the


Purchasers by written notice the right, for a period of thirty (30) days, to purchase for cash at an amount equal to the price or other consideration for which such securities are to be issued, a number of such securities so that, after giving effect to such issuance (and the conversion, exercise and exchange into or for, whether directly or indirectly, shares of Common Stock of all such securities that are so convertible, exercisable or exchangeable) the Purchasers shall each have the opportunity to purchase such number of shares of securities such that each Purchaser will continue to maintain its same proportionate equity ownership (on a fully-diluted basis) in the Company as of the date of such notice (treating each such party, for the purpose of such computation, as the holder of the number of shares of Common Stock which would be issuable to such party upon conversion, exercise and exchange of all securities held by such party on the date such offer is made, that are convertible, exercisable or exchangeable into or for (whether directly or indirectly) shares of Common Stock and assuming the like conversion, exercise and exchange of all such other securities held by other persons).

(b) Exceptions. The participation rights of the Purchasers pursuant to this Section 7 shall not apply to securities issued or issuable: (A) upon conversion of any of the Company's outstanding convertible securities (including without limitation any class or series of Preferred Stock), (B) as a stock dividend or upon any subdivision of shares of Common Stock, provided that the securities issued pursuant to such stock dividend or subdivision are limited to additional shares of Common Stock, (C) solely in consideration for the acquisition (whether by merger or otherwise) by the Company or any of its subsidiaries of all or substantially all of the stock or assets of any other entity, (D) pursuant to the grant or exercise of options or warrants to purchase Common Stock granted previously or in the future to directors, officers, employees or consultants of the Company pursuant to the Company's existing stock option and incentive plans, as such may be amended, or (E) in connection with any strategic partner alliance or joint venture where the parties to such venture are not financial investors and such transaction is approved by all of the members of the Board of Directors.

(c) Procedure. The Company's written notice to the Purchasers shall describe the securities proposed to be issued by the Company and specify the number of shares, price and payment terms. The Purchasers, or any of them, may accept the Company's offer as to the full number of securities offered to it, or any lesser number, by written notice thereof given by each such Purchaser to the Company prior to the expiration of the aforesaid thirty (30) day period, in which event the Company shall sell and such party shall buy, upon the terms specified, the number of securities agreed to be purchased by such party at such time and commensurate with the sale by the Company of all of the remainder of such securities and as hereinafter provided. The Company shall be free, at any time prior to ninety (90) days after the date of its notice of offer to the Purchasers, to offer and sell to any third party or parties the remainder of such securities proposed to be issued by the Company (including but not limited to the securities not agreed by the Purchasers to be purchased by them), at a price and on payment terms no less favorable to the Company than those specified in such notice of offer to the Purchasers. If such third party sale or sales are not consummated within such 90-day period, however, the Company shall not sell such securities as shall not have been purchased within such period without again complying with this Section 7.

8. CONDITIONS TO CLOSING. The Closing shall not occur until the following conditions have been satisfied or their satisfaction waived by the Company or the Purchasers holding a majority of the then-outstanding Preferred Shares, as applicable:

a. The Company and the Purchasers shall have entered into a Voting Agreement in substantially the form attached hereto as Exhibit 3 (the "Voting Agreement").


b. The Amendment shall have been filed with the Secretary of State for the Commonwealth of Massachusetts.

c. The Company shall have delivered to the Purchasers of the Initial Units a certificate of good standing, dated as of a recent date, issued by the Secretary of State for the Commonwealth of Massachusetts.

d. The Company's representations and warranties set forth herein shall be true and correct as of the Closing and an authorized officer of the Company shall deliver a certificate to the Purchasers certifying to the same.

e. The Purchasers shall receive a legal opinion from Epstein Becker & Green, P.C., the Company's counsel, which opinion shall be reasonably satisfactory to the Purchasers.

9. SURVIVAL OF REPRESENTATIONS. WARRANTIES AND AGREEMENTS. Notwithstanding any investigation made by any party to this Agreement, all covenants, agreements, representations and warranties made by the Company herein shall survive the execution of this Agreement and the consummation of the transactions contemplated herein.

10. NO FEE. The Purchasers each, severally and jointly, hereby represent that there are no brokers or finders entitled to compensation in connection with the transactions contemplated herein. The Company shall indemnify and hold harmless each of the Purchasers from any claims made by third parties that such third party is entitled to compensation from the Company in connection with the transactions contemplated herein; provided that the Company shall not be liable for any indemnification hereunder that arises out of or is related to a breach of the first sentence of this Section 10.

11. NOTICES. All notices, requests, consents and other communications hereunder shall be in writing, shall be addressed to the receiving party's address set forth below or to such other address as a party may designate by notice hereunder, and shall be either (i) delivered by hand, (ii) made by telex, telecopy or facsimile transmission, (iii) sent by overnight courier or (iv) sent by registered or certified mail, return receipt requested, postage prepaid:

(a) if to the Company, to:
Molecular Insight Pharmaceuticals, Inc. 160 Second Street
Cambridge, MA 02142
Attn: Chief Operating Officer Fax: (617)492-5664

With a copy to:

Gabor Garai
Epstein Becker & Green, P.c.

111 Huntington Avenue
Boston, MA 02199

Fax: (617)342-4001


(b) if to the Purchaser, to the address set forth on Schedule I attached hereto

All notices, requests, consents and other communications hereunder shall be deemed to have been given either (i) if by hand, at the time of the delivery thereof to the receiving party at the address of such party set forth above,
(ii) if made by telex, telecopy or facsimile transmission, at the time that receipt thereof has been acknowledged by electronic confirmation or otherwise,
(iii) if sent by overnight courier, on the next business day following the day such notice is delivered to the courier service, or (iv) if sent by registered or certified mail, on the 5th business day following the day such mailing is made.

12. AMENDMENTS. Any term of this Agreement may be amended, or compliance therewith waived, only with the written consent of (i) the Company and (ii) the holders of a majority in interest of the Preferred Shares then outstanding and issued to the Purchasers hereunder.

13. ASSIGNMENT. The rights and obligations under this Agreement may not be assigned by the Purchasers without the prior written consent of the Company. Notwithstanding the foregoing, the Purchaser shall have the right to assign any of their rights or interest to any Affiliate of such Purchaser as long as such Affiliate agrees to be bound by all the terms and conditions applicable to the Units including, without limitation, this Agreement, the Warrant and the Voting Agreement. As used herein, "Affiliate" shall mean, with respect to any person or entity, any other person or entity directly or indirectly controlling, controlled by or under common control with such Purchaser.

14. BENEFIT. All statements, representations, warranties, covenants and agreements in this Agreement shall be binding on the parties hereto and shall inure to the benefit of the respective successors and permitted assigns of each party hereto. Nothing in this Agreement shall be construed to create any rights or obligations except among the parties hereto, and no person or entity shall be regarded as a third-party beneficiary of this Agreement.

15. EXPENSES. Each of the parties hereto shall pay its own fees and expenses (including the fees of any attorneys, accountants, appraisers or others engaged by such party) in connection with this Agreement and the transactions contemplated hereby.

16. NO WAIVER: CUMULATIVE REMEDIES. No failure or delay on the part of any party to this Agreement in exercising any right, power or remedy hereunder shall operate as a waiver thereof; nor shall any single or partial exercise of any such right, power or remedy preclude any other or further exercise thereof or the exercise of any other right, power or remedy hereunder. The remedies herein provided are cumulative and not exclusive of any remedies provided by law.

17. HEADINGS. The headings of the various sections of this Agreement have been inserted for convenience of reference only and shall not be deemed to be part of this Agreement.

18. SEVERABILITY. In case any provision contained in this Agreement should be invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby.


19. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with (i) the internal laws of the Commonwealth of Massachusetts without giving effect to its principles of conflicts of law, and (ii) United States federal law.

20. COUNTERPARTS. This Agreement may be executed in counterparts, each of which shall constitute an original, but all of which, when taken together, shall constitute but one instrument, and shall become effective when one or more counterparts have been signed by each party hereto and delivered to the other parties.

21. FURTHER ASSURANCES. From and after the date of this Agreement, upon the request of the Purchaser or the Company, the Company and the Purchaser shall execute and deliver such instruments, documents and other writings as may be reasonably necessary or desirable to confirm and carry out and to effectuate fully the intent and purposes of this Agreement and the Units.

[The remainder of this page intentionally has been left blank.]


IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the date first written above.

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By: /s/ David S. Barlow
    -------------------
Name: David S. Barlow
Title: Chairman & CEO

PURCHASERS:

/s/ Frederick Frank
-------------------
Frederick Frank

CERBERUS PARTNERS, L.P.

By: Cerberus Associates, L.L.C.,
its general partner

By: /s/ Seth Plattus
    -----------------------------------
        Seth Plattus, Managing Director


Exhibit 10.2

STOCK PURCHASE AGREEMENT

THIS STOCK PURCHASE AGREEMENT ("Agreement") is made as of this 29th day of March, 2005, by and among Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation (the "Company"), and the investors identified on the signature pages hereto (each an "Investor" and collectively, the "Investors").

RECITALS:

A. The Company desires to raise up to $30,000,030 (the "Aggregate Purchase Price") through the issuance and sale to the Investors at a per share purchase price of $202.00 (the "Per Share Purchase Price") of up to an aggregate of 148,515 shares (the "Series C Preferred Shares") of a newly created series of preferred stock, par value $0.01 per share, of the Company, designated as "Series C Convertible Preferred Stock" (the "Series C Preferred Stock"), which Series C Preferred Stock shall have the rights, preferences and privileges set forth in the Articles of Amendment to the Articles of Organization of the Company, in the form of Exhibit A attached hereto (the "Articles of Amendment");

B. Upon the terms and subject to the conditions set forth in this Agreement and pursuant to Section 4(2) of the Securities Act of 1933, as amended, and Rule 506 promulgated thereunder, the Investors desire to purchase from the Company, and the Company desires to issue and sell to the Investors, such number of shares of Series C Preferred Stock, as are set forth next to each such Investor's name on the applicable Schedule I attached hereto; and

C. Contemporaneously with the purchase and sale of the Series C Preferred Shares at each Closing, the parties hereto will enter into an Investor Rights Agreement, in the form attached hereto as Exhibit B (the "Investor Rights Agreement"), which shall, among other things, set forth the rights of the Investors to: (i) the registration of shares of common stock, par value $0.01 per share, of the Company (the "Common Stock") issuable to the Investors upon conversion of the Series C Preferred Stock; (ii) the receipt of certain information from the Company; and (iii) the participation in future issuances and transfers of securities of the Company.

NOW, THEREFORE, in consideration of the mutual promises made herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and each of the Investors, severally and not jointly, hereto agree as follows:

1. Definitions. In addition to those terms defined above and elsewhere in this Agreement, for the purposes of this Agreement, the following terms shall have the meanings set forth in this Section 1:

"Affiliate" means, with respect to any Person, any other Person which directly or indirectly Controls, is Controlled by, or is under common Control with, such Person. Notwithstanding the foregoing, none of the Company, its owners, officers, directors, employees, agents or advisors (or any of their family members) shall be deemed an "Affiliate" of an Investor, unless any such Person is otherwise (i.e., independent of the Company) an Affiliate of such Investor.

"Aggregate Purchase Price" has the meaning set forth in the recitals to this Agreement.

"Agreement" has the meaning set forth in the preamble to this Agreement.

"Articles of Amendment" has the meaning set forth in the recitals to this Agreement.


"Articles of Organization" means the Articles of Organization of the Company filed with the Secretary of Commonwealth of the Commonwealth of Massachusetts on January 10, 1997, as amended.

"Board" means the Board of Directors of the Company.

"Business Day" means a day, other than a Saturday or Sunday, on which banks in New York, New York are open for the general transaction of business.

"Cash Placement Agent Fee" means, with respect to each Closing, the amount payable to the Placement Agent as compensation for the issuance and sale of the Series C Preferred Shares pursuant to this Agreement and the other Transaction Documents, which amount is set forth on Schedule 1.

"Cerberus" means Cerberus Capital Management, L.P., for itself and/or one or more of its Affiliates and/or accounts managed by Cerberus Capital Management, L.P., including, without limitation, Cerberus Partners, L.P.

"Cerberus Counsel" means Lowenstein Sandler PC, counsel to Cerberus.

"Cerberus Counsel Fees" has the meaning set forth in Section 9.5.

"Closing" means, as the context in which such term is used requires, the Initial Closing or a Follow-on Closing.

"Closing Date" means, as the context in which such term is used requires, the Initial Closing Date or a Follow-on Closing Date.

"Co-Lead Investors" means Cerberus Partners, L.P. and MedCap Partners, L.P.

"Commission" means the U.S. Securities and Exchange Commission or any other successor federal agency then administering the Securities Act and other federal securities laws.

"Common Stock" means the Common Stock and any other securities into which or for which such Common Stock may be converted or exchanged pursuant to a plan of recapitalization, reorganization, merger, consolidation, sale of assets or other similar transaction.

"Company" has the meaning set forth in the preamble to this Agreement.

"Company Counsel" means Foley & Lardner LLP, counsel to the Company.

"Company's Knowledge" means the actual knowledge of the key employees of the Company and of each of the Subsidiaries, after due inquiry and investigation.

"Confidential Information" means trade secrets, confidential information and know-how (including but not limited to ideas, formulae, compositions, manufacturing and production processes, procedures and techniques, research and development information, clinical data, computer program code, performance specifications, support documentation, drawings, specifications, designs, business and marketing plans, and customer and supplier lists and related information).

"Control" means the possession, direct or indirect, of the power to direct or cause the

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direction of the management and policies of a Person, whether through the ownership of voting securities, by contract or otherwise.

"Conversion Shares" means the shares of Common Stock issuable upon conversion of the Series C Preferred Stock.

"Dividend Shares" means shares of Common Stock issuable as dividends on the Series C Preferred Stock in accordance with the terms of the Articles of Amendment.

"Environmental Laws" has the meaning set forth in Section 4.14.

"Escrow Amount" has the meaning set forth in Section 3.1(a).

"Escrow Termination Date" means: (a) in the case of the Initial Closing, March 29, 2005; and (b) in the case of a Follow-on Closing, ten (10) Business Days after Cerberus' receipt of the notice contemplated by Section 6.1(r); provided, however, Cerberus may, in its sole discretion, extend an Escrow Termination Date by giving written notice to the Company and Cerberus Counsel of its election to so extend such Escrow Termination Date, and such Escrow Termination Date shall be the date specified in such notice, provided, further, however, the Escrow Termination Date with respect to the Initial Closing shall not be later than April 11, 2005, and in the case of a Follow-on Closing, shall not be later than the sooner of the 61st day after the Initial Closing Date and twenty (20) Business Days after Cerberus' receipt of the notice contemplated by Section 6.1(r), and on such extended date, if such Closing shall not have occurred, Cerberus Counsel shall return the Escrow Amount attributable to such Closing in accordance with Section 3.1(b).

"FDA" means the U.S. Food and Drug Administration.

"FDCA" means the U.S. Food Drug and Cosmetics Act (FDCA), 21 U.S.C. Sec. 301 et seq., as amended, and any successor federal statute, and the rules and regulations promulgated thereunder, all as the same shall be in effect from time to time.

"Financial Statements" has the meaning set forth in Section 4.6.

"Follow-on Closing" has the meaning set forth in Section 2.2(d).

"Follow-on Closing Date" has the meaning set forth in Section 2.2(d).

"Follow-on Investor" means an Investor who purchases shares of Series C Preferred Stock in a Follow-on Closing, who must be either (x) engaged in the same or a similar business or industry as the Company (i.e., strategic investors), (y) approved in writing by Cerberus in its reasonable discretion or
(z) a holder of Series B Convertible Preferred Stock that exercises its right to participate in the Follow-on Closing pursuant to Section 7 of Unit Purchase Agreement dated February 23, 2004 by and among the Company and the purchasers of Series B Convertible Preferred Stock named therein.

"Hatch-Waxman Act" means the Drug Price Competition and Patent Term Restoration Act of 1984 (Pub. L. 98-417 (1984)), otherwise known as the Hatch Waxman of 1984, 21 U.S.C. 355, as amended, and any successor federal statute, and the rules and regulations promulgated thereunder, all as the same shall be in effect from time to time.

"Indebtedness" means all obligations, contingent and otherwise, which should, in accordance with generally accepted accounting principles, be classified upon the obligor's balance sheet

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(or the notes thereto) as liabilities, but in any event including liabilities secured by any mortgage on property owned or acquired subject to such mortgage, whether or not the liability secured thereby shall have been assumed, and also including (i) all guaranties, endorsements and other contingent obligations, in respect of Indebtedness of others, whether or not the same are or should be so reflected in said balance sheet (or the notes thereto), except guaranties by endorsement of negotiable instruments for deposit or collection or similar transactions in the ordinary course of business and (ii) the present value of any lease payments due under leases required to be capitalized in accordance with applicable Statements of Financial Accounting Standards, determined by discounting all such payments at the interest rate determined in accordance with applicable Statements of Financial Accounting Standards.

"Indemnified Person" has the meaning set forth in Section 8.3.

"Initial Closing" has the meaning set forth in Section 2.2(a).

"Initial Closing Date" has the meaning set forth in Section 2.2(a).

"Initial Investor" means an Investor that purchases shares of Series C Preferred Stock at the Initial Closing.

"Intellectual Property" means all of the following: (i) patents, patent disclosures and inventions (whether or not patentable and whether or not reduced to practice); (ii) trademarks, service marks, trade dress, trade names, corporate names, logos, slogans and Internet domain names, together with all goodwill associated with each of the foregoing; (iii) copyrights and copyrightable works; (iv) registrations, applications and renewals for any of the foregoing; (v) Confidential Information; and (vi) computer software (including, but not limited to, data, data bases and documentation), but excluding off-the-shelf non-customized software.

"Investor" has the meaning set forth in the preamble to this Agreement, and refers to, as the context in which such term is used requires, an Initial Investor or a Follow-on Investor; provided, that, if the context does not so require, then such term refers to all Investors under this Agreement regardless of which Closing such Investor purchases its Series C Preferred Stock.

"Investor Rights Agreement" has the meaning set forth in the recitals to this Agreement.

"Key Employee" means each of David Barlow, John Babich, Nicholas Borys and John McCray.

"License Agreements" has the meaning set forth in Section 4.13(b).

"Losses" has the meaning set forth in Section 8.2.

"Material Adverse Change" means a material adverse change in (i) the results of operations, assets, prospects, business or condition (financial or otherwise) of the Company and its Subsidiaries, if any, taken as a whole; (ii) the legality, validity or enforceability of any Transaction Document; or (iii) the Company's ability to perform fully on a timely basis its obligations under any of the Transaction Documents.

"Material Adverse Effect" means a material adverse effect on: (i) the results of operations, assets, prospects, business or condition (financial or otherwise) of the Company and its Subsidiaries, if any, taken as a whole;
(ii) the legality, validity or enforceability of any Transaction Document; or
(iii) the Company's ability to perform fully on a timely basis its obligations under any of

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the Transaction Documents.

"Maximum Number" means 148,515 shares of Series C Preferred Stock.

"NDA" means a New Drug Application filed with the FDA.

"Per Share Purchase Price" has the meaning set forth in the recitals to this Agreement.

"Person" means an individual, corporation, partnership, limited liability company, trust, business trust, association, joint stock company, joint venture, sole proprietorship, unincorporated organization, governmental authority or any other form of entity not specifically listed herein.

"Placement Agent" means SG Cowen & Co.

"Regulation D" means Regulation D, as promulgated by the Commission under the Securities Act.

"Securities Act" means the Securities Act of 1933, as amended, and any successor federal statute, and the rules and regulations of the Commission promulgated thereunder, all as the same shall be in effect from time to time.

"Series C Director" has the meaning ascribed thereto in the Articles of Amendment.

"Series C Preferred Stock" has the meaning set forth in the recitals to this Agreement.

"Series C Preferred Shares" has the meaning set forth in the recitals to this Agreement.

"Shares" means the Series C Preferred Shares, the Conversion Shares and the Dividend Shares.

"Subsidiary" or "Subsidiaries" means any corporation or trust of which the Company and/or any of its other Subsidiaries directly or indirectly owns at the time outstanding shares (regardless of class) of such corporation or trust comprising more than 50% of the voting power of such corporation or trust.

"Transaction Documents" means this Agreement, the Articles of Amendment, the Investor Rights Agreement, and each of the other agreements, documents, certificates and instruments executed and delivered in connection with the foregoing.

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2. Purchase and Sale of Securities; Initial and Follow-on Closings.

2.1. Purchase and Sale of Securities. Upon the terms and subject to the conditions contained herein, at each Closing, the Company shall issue and sell, and each Investor listed on Schedule I (in the case of the Initial Closing, and Schedule I-A, Schedule I-B, and so on, in the case of each Follow-on Closing, if any) attached hereto, shall severally, and not jointly, purchase, the number of shares of Series C Preferred Stock in the amounts set forth opposite such Investor's name on the applicable Schedule I attached hereto, in exchange for the cash consideration set forth as the "Purchase Price" opposite such Investor's name on the applicable Schedule I attached hereto. For purposes hereof, the number of shares of Series C Preferred Stock with respect to each Investor set forth on the applicable Schedule I shall be equal to the quotient of the "Purchase Price" opposite such Investor's name on the applicable Schedule I divided by the Per Share Purchase Price.

2.2. Closings.

(a) The initial closing of the transactions contemplated by this Agreement (the "Initial Closing") shall take place at 10:00 a.m. at the offices of Company Counsel, 111 Huntington Street, Boston, Massachusetts 02199, by facsimile, e-mail or similar communication, on March 29, 2005, or as soon after that as all of the conditions to the respective obligations of the Company and the Initial Investors have been satisfied or waived (the "Initial Closing Date"), or at such other location as the Company and Cerberus shall mutually agree and/or on such other date as Cerberus shall determine in its sole discretion, but in no event later than April 11, 2005.

(b) Upon satisfaction of the conditions to the applicable Closing set forth in Section 6 hereof, the Company shall issue or cause to be issued to each Investor, a certificate or certificates representing the number of shares of Series C Preferred Stock as is set forth opposite such Investor's name on the applicable Schedule I attached hereto, against delivery to the Company by Cerberus Counsel, in its capacity as escrow agent hereunder, for the benefit of such Investor of the amount set forth as the "Purchase Price" opposite such Investor's name on the applicable Schedule I attached hereto, in immediately available funds, by wire transfer to an account designated before the applicable Closing in writing by the Company for such purpose.

(c) Upon satisfaction of the conditions to the applicable Closing set forth in Section 6, the Company and Cerberus shall jointly instruct Cerberus Counsel to release to the Company the Escrow Amount attributable to such Closing.

(d) From time to time during the period beginning on the day after the Initial Closing Date and ending 60 calendar days thereafter, in one or more transactions (each, a "Follow-on Closing"), the Company may issue and sell a number of shares of Series C Preferred Stock, up to the Maximum Number (less the number of all shares of Series C Preferred Stock theretofore issued and sold by the Company), on the same terms and conditions that all other shares of Series C Preferred Stock have been issued and sold by the Company, to Follow-on Investors who are either (x) engaged in the same or a similar business or industry as the Company (i.e., strategic investors), (y) approved in writing by Cerberus in its reasonable discretion or (z) holders of Series B Convertible Preferred Stock that exercise their respective rights to participate in the Follow-on Closing pursuant to Section 7 of Unit Purchase Agreement dated February 23, 2004 by and among the Company and the purchasers of Series B Convertible Preferred Stock named therein. The Company shall give written notice of each Follow-on Closing to Cerberus as described in Section 6.1(r) at least five (5) days in advance of such Follow-on Closing. Each Follow-on Closing shall take place at 10:00 a.m. at the offices of Company Counsel, 111 Huntington Street, Boston, Massachusetts 02199, by facsimile, e-mail or similar communication, no less

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than five (5) days after written notice thereof has been received by Cerberus as described in Section 6.1(r), or as soon after that as all of the conditions to the respective obligations of the Company and the Follow-on Investors to consummate the Follow-on Closing have been satisfied or waived (each, a "Follow-on Closing Date"), or at such other location as the Company and Cerberus shall mutually agree and/or on such other date as each of them shall determine in their sole discretion, but in no event later than the 61st day after the Initial Closing Date. With each Follow-On Closing, the Company and each Follow-On Investor shall execute a counter part signature page to this Agreement and each of the other Transaction Documents to which the Investors are a party, which counterpart signature page shall be deemed an amendment to the applicable Agreement or Transaction Document without any further action on the part of the other Investors and notwithstanding anything to the contrary in such agreement pertaining to amendment thereof.

3. Escrow.

3.1. (a) Simultaneously with the execution and delivery of this Agreement by an Investor, such Investor shall: (i) promptly cause a wire transfer of immediately available funds (U.S. dollars) in an amount representing the "Purchase Price", as set forth on such Investor's signature page and opposite its name on the applicable Schedule I affixed hereto, to be paid to an escrow account of Cerberus Counsel, in its capacity as escrow agent hereunder, set forth on Schedule II affixed hereto (the aggregate amounts being held in escrow are referred to herein as the "Escrow Amount"); and (ii) deliver to Cerberus a duly executed counterpart to the Investor Rights Agreement. Cerberus Counsel shall hold the Escrow Amount in escrow in accordance with Section
3.1(b). Cerberus Counsel shall invest the Escrow Amount received pursuant to this Section 3.1(a) in accordance with the instructions set forth on Schedule III, annexed hereto and made a part hereof.

(b) With respect to each Closing, Cerberus Counsel shall continue to hold the Escrow Amount in escrow (as may be invested pursuant to Schedule III) in accordance with and subject to this Agreement, from the date of its receipt of the funds constituting the Escrow Amount until the sooner of: (x) the Closing Date to which such Escrow Amount applies, in which case, such Escrow Amount shall be distributed in accordance with Section 3.3; or (y) the applicable Escrow Termination Date applicable to such Escrow Amount (after taking into account any extensions thereof), in which case the Escrow Amount attributable to such Closing shall be returned to the Investors in accordance with their written wire transfer instructions delivered to Cerberus Counsel. In the case of an Escrow Termination Date, if Cerberus Counsel has not received written wire transfer instructions from any Investor before the 30th day after the applicable Escrow Termination Date, then Cerberus Counsel may, in its sole and absolute discretion, either (x) deposit that portion of the Escrow Amount to be returned to such Investor in a court of competent jurisdiction on written notice to such Investor and Cerberus Counsel shall thereafter have no further liability with respect to such deposited funds, or (y) continue to hold such portion of the Escrow Amount pending receipt of written wire transfer instructions from such Investor or an order from a court of competent jurisdiction, and in case of clauses (x) and (y), the reasonable fees and expenses of Cerberus Counsel may be deducted from such portion of the Escrow Amount.

3.2 The Company and the Investors acknowledge and agree for the benefit of Cerberus Counsel (which shall be deemed to be a third party beneficiary of this Section 3.2 and of Section 9.5) as follows:

(a) Cerberus Counsel: (i) is not responsible for the performance by the Company or the Investors of this Agreement or any of the Transaction Documents or for determining or compelling compliance therewith;
(ii) is only responsible for (A) holding the applicable Escrow Amount in escrow pending receipt of written instructions from the Company and Cerberus directing the release of such Escrow Amount, (B) disbursing the applicable

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Escrow Amount in accordance with the written instructions from the Company and Cerberus, and (C) investing the applicable Escrow Amount in accordance with Schedule III, each of the responsibilities of Cerberus Counsel in clause (A), (B) and (C) is ministerial in nature, and no implied duties or obligations of any kind shall be read into this Agreement against or on the part of Cerberus Counsel (collectively, the "Cerberus Counsel Duties"); (iii) shall not be obligated to take any legal or other action hereunder which might in its judgment involve or cause it to incur any expense or liability unless it shall have been furnished with indemnification acceptable to it, in its sole discretion; (iv) may rely on and shall be protected in acting or refraining from acting upon any written notice, instruction (including, without limitation, wire transfer instructions, whether incorporated herein or provided in a separate written instruction), instrument, statement, certificate, request or other document furnished to it hereunder and believed by it to be genuine and to have been signed or presented by the proper Person, and shall have no responsibility for making inquiry as to, or for determining, the genuineness, accuracy or validity thereof, or of the authority of the Person signing or presenting the same; and (v) may consult counsel satisfactory to it, and the opinion or advice of such counsel in any instance shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in accordance with the opinion or advice of such counsel. Documents and written materials referred to in this Section 3.2(a) include, without limitation, e-mail and other electronic transmissions capable of being printed, whether or not they are in fact printed; and any such e-mail or other electronic transmission may be deemed and treated by Cerberus Counsel as having been signed or presented by a Person if it bears, as sender, the Person's e-mail address.

(b) Cerberus Counsel shall not be liable to anyone for any action taken or omitted to be taken by it hereunder, except in the case of Cerberus Counsel's gross negligence or willful misconduct in breach of Cerberus Counsel Duties. IN NO EVENT SHALL CERBERUS COUNSEL BE LIABLE FOR INDIRECT, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGE OR LOSS (INCLUDING BUT NOT LIMITED TO LOST PROFITS) WHATSOEVER, EVEN IF CERBERUS COUNSEL HAS BEEN INFORMED OF THE LIKELIHOOD OF SUCH LOSS OR DAMAGE AND REGARDLESS OF THE FORM OF ACTION.

(c) The Company and the Investors jointly and severally, hereby indemnify and hold harmless Cerberus Counsel from and against any and all loss, liability, cost, damage and expense, including, without limitation, reasonable counsel fees and expenses, which Cerberus Counsel may suffer or incur by reason of any action, claim or proceeding brought against Cerberus Counsel arising out of or relating to the performance of Cerberus Counsel Duties only, unless such action, claim or proceeding is exclusively the result of the willful misconduct or gross negligence of Cerberus Counsel.

(d) Cerberus Counsel has acted as legal counsel to Cerberus in connection with this Agreement and the other Transaction Documents, is merely acting as a stakeholder, in its capacity as escrow agent hereunder, and is, therefore, hereby authorized to continue acting as legal counsel to Cerberus including, without limitation, with regard to any dispute arising out of this Agreement, the other Transaction Documents, the Escrow Amount or any other matter. Each of the Company and each Investor hereby expressly consents to permit Cerberus Counsel to represent Cerberus in connection with all matters relating to this Agreement, including, without limitation, with regard to any dispute arising out of this Agreement, the other Transaction Documents, the Escrow Amount or any other matter, and hereby waives any conflict of interest or appearance of conflict or impropriety with respect to such representation. Each of the Company and the Investors has consulted with its own counsel specifically about this Section 3 to the extent they deemed necessary, and has entered into this Agreement after being satisfied with such advice.

(e) Cerberus Counsel shall have the right at any time to resign for any reason and be discharged of its duties as escrow agent hereunder by giving written notice of its resignation to the

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Company and Cerberus at least ten (10) calendar days prior to the specified effective date of such resignation. All obligations of Cerberus Counsel hereunder shall cease and terminate on the effective date of its resignation and its sole responsibility thereafter shall be to hold the Escrow Amount, for a period of ten (10) calendar days following the effective date of resignation, at which time:

(i) if a successor escrow agent shall have been appointed and have accepted such appointment in a writing to both the Company and Cerberus, then upon written notice thereof given to each of the Investors or Follow-on Investors, as the case may be, Cerberus Counsel shall deliver the Escrow Amount to the successor escrow agent, and upon such delivery, Cerberus Counsel shall have no further liability or obligation; or

(ii) if a successor escrow agent shall not have been appointed, for any reason whatsoever, Cerberus Counsel shall at its option in its sole discretion, either (A) deliver the applicable Escrow Amount then held by it to a court of competent jurisdiction selected by Cerberus Counsel and give written notice thereof to the Company and the Investors or Follow-on Investors, as the case may be, or (B) continue to hold Escrow Amount in escrow pending written direction from the Company and Cerberus in form and formality satisfactory to Cerberus Counsel.

(f) In the event that Cerberus Counsel shall be uncertain as to its duties or rights hereunder or shall receive written instructions with respect to an Escrow Amount or any portion thereunder which, in its sole discretion, are in conflict either with other written instructions received by it or with any provision of this Agreement, Cerberus Counsel shall have the absolute right to suspend all further performance under this Agreement (except for the safekeeping of such Escrow Amount) until such uncertainty or conflicting instructions have been resolved to Cerberus Counsel's sole satisfaction by final judgment of a court of competent jurisdiction or joint written instructions from the Company and Cerberus. In the event that any controversy arises between the Company and one or more of the Investors or Follow-on Investors, as the case may be, or any other party with respect to this Agreement or any Escrow Amount, Cerberus Counsel shall not be required to determine the proper resolution of such controversy or the proper disposition of such Escrow Amount, and shall have the absolute right, in its sole discretion, to deposit the Escrow Amount pertaining to such Investor(s) with the clerk of a court selected by Cerberus Counsel and file a suit in interpleader in that court and obtain an order from that court requiring all parties involved to litigate in that court their respective claims arising out of or in connection with the disputed portion of the Escrow Amount. Upon the deposit by Cerberus Counsel of the disputed portion of the Escrow Amount with the clerk of such court in accordance with this provision, Cerberus Counsel shall thereupon be relieved of all further obligations and released from all liability hereunder with respect to the disputed portion of the Escrow Amount.

(g) The provisions of Section 3 shall survive any termination of this Agreement.

3.3 Release of Escrow upon Closing. Cerberus Counsel, in its capacity as escrow agent hereunder, shall, at the applicable Closing, release that portion of the Escrow Amount attributable to such Closing in accordance with the following:

(a) in the case of the Initial Closing, receipt of written instructions from the Company and Cerberus that the Initial Closing shall have been consummated, in which case, Cerberus

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Counsel shall release that portion of the Escrow Amount constituting the aggregate "Purchase Price" reflected on the Schedule I attributable to the Initial Closing as follows: (A) the portion of the Cash Placement Agent Fee applicable to the Initial Closing to the Placement Agent, (B) subject to
Section 9.5, the Cerberus Counsel Fees for the Initial Closing to Cerberus Counsel and (C) the balance of the aggregate "Purchase Price" reflected on Schedule I to the Company; and

(b) in the case of each Follow-on Closing, if any, receipt of written instructions from the Company and Cerberus that such Follow-on Closing shall have been consummated, in which case, Cerberus Counsel shall release that portion of the Escrow Amount constituting the aggregate "Purchase Price" reflected on the applicable Schedule I attributable to such Follow-on Closing as follows: (A) the portion of the Cash Placement Agent Fee applicable to such Follow-on Closing to the Placement Agent, (B) subject to Section 9.5, the Cerberus Counsel Fees for such Follow-on Closing to Cerberus Counsel, and (C) the balance of the Escrow Amount then held by Cerberus Counsel to the Company.

4. Representations and Warranties of the Company. The Company hereby represents and warrants to each Investor, severally and not jointly, on and as of the date hereof and the applicable Closing Date, knowing and intending such Investor's reliance hereon, that:

4.1. Organization, Good Standing and Qualification. Each of the Company and its Subsidiaries, a complete list of which is set forth in Schedule 4.1 hereto, is a corporation duly incorporated, validly existing and in good standing under the laws of the jurisdiction of its incorporation and has all requisite corporate power and authority to carry on its business as now conducted and to own its properties. Each of the Company and its Subsidiaries is duly qualified to do business as a foreign corporation and is in good standing in each jurisdiction in which the conduct of its business or its ownership or its leasing of property makes such qualification or licensing necessary, unless the failure to so qualify in any such jurisdiction would not have a Material Adverse Effect.

4.2. Authorization. The Company has the requisite corporate power and authority and has taken all requisite action on the part of the Company, its officers, directors and stockholders necessary for: (i) the authorization, execution and delivery of the Transaction Documents; (ii) the authorization of the performance of all obligations of the Company hereunder or thereunder; and
(iii) the authorization, issuance (or reservation for issuance) and delivery of the Shares. The Transaction Documents constitute the legal, valid and binding obligations of the Company, enforceable against the Company in accordance with their respective terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability, relating to or affecting creditors' rights generally and general principles of equity.

4.3. Capitalization.

(a) Schedule 4.3(a) sets forth (without giving effect to the Articles of Amendment): (i) the authorized capital stock of the Company on the date hereof; (ii) the number of shares of capital stock issued and outstanding;
(iii) the number of shares of capital stock issuable, and the number of shares of capital stock reserved for issuance, pursuant to the Company's stock plans; and (iv) the number of shares of capital stock issuable and reserved for issuance pursuant to securities (other than the Shares) exercisable for, or convertible into or exchangeable for any shares of capital stock of the Company. All of the shares of the Company's capital stock have been, or upon issuance will be, duly authorized, validly issued, fully paid, nonassessable and free of preemptive rights and were, or upon issuance will be, issued in full compliance with applicable law and any rights of third parties. All of the issued and outstanding shares of capital stock of each Subsidiary have been duly authorized and validly issued and are fully paid, nonassessable and free of preemptive rights, were issued in full compliance with applicable law and any rights of third parties and are owned by the Company, beneficially and of record,

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and, except as described on Schedule 4.3(a), are subject to no lien, encumbrance or other adverse claim. Except as set forth on Schedule 4.3(a), no Person is entitled to preemptive or similar statutory or contractual rights with respect to any securities of the Company. Except as described on Schedule 4.3(a), there are no outstanding warrants, options, convertible securities or other rights, agreements or arrangements of any character under which the Company or any of its Subsidiaries is or may be obligated to issue any equity securities of any kind and, except as contemplated by this Agreement, neither the Company nor any of its Subsidiaries is currently in negotiations for the issuance of any equity securities of any kind. Except as described on Schedule 4.3(a) and except for the Investor Rights Agreement, there are no voting agreements, buy-sell agreements, option or right of first purchase agreements or other agreements of any kind among the Company and any of its security holders or other third parties relating to the securities of the Company. Except as described on Schedule 4.3(a) and except for the Investor Rights Agreement, the Company has not granted any Person the right to require the Company to register any of its securities under the Securities Act, whether on a demand basis or in connection with the registration of securities of the Company for its own account or for the account of any other Person.

(b) Schedule 4.3(b) sets forth a true and complete table setting forth the pro forma capitalization of the Company on a fully diluted basis giving effect to: (i) the issuance of the Series C Preferred Shares through and including the applicable Closing; (ii) any adjustments in other securities resulting from the issuance of the Series C Preferred Shares through and including the applicable Closing; and (iii) the exercise or conversion of all outstanding securities. Except as described on Schedule 4.3(b), the issuance and sale of the Series C Preferred Shares hereunder will not obligate the Company to issue shares of Common Stock or other securities to any other Person (other than the Investors in their capacity as Investors hereunder) and will not result in the adjustment of the exercise, conversion, exchange or reset price of any outstanding security.

4.4. Valid Issuance. The Series C Preferred Shares have been duly and validly authorized and, when issued to the Investors in accordance with the terms of this Agreement, will be validly issued, fully paid and nonassessable, shall have the rights, preferences and limitations set forth in the Articles of Amendment and the Investor Rights Agreement and shall be free and clear of all liens, claims, encumbrances and restrictions, except for restrictions on transfer set forth in the Transaction Documents or imposed by applicable securities laws. Upon the due conversion of the Series C Preferred Stock, the Conversion Shares will be validly issued, fully paid and nonassessable, and shall be free and clear of all liens, claims, encumbrances and restrictions, except for restrictions on transfer set forth in the Transaction Documents or imposed by applicable securities laws. The Company has reserved a sufficient number of shares of Common Stock for issuance upon conversion of the Series C Preferred Stock.

4.5. Consents. The execution, delivery and performance by the Company of the Transaction Documents and the offer, issuance and sale of the Shares require no consent of, authorization by, exemption from, filing with or notice to, any governmental body, agency, official or any other Person, other than those filings that have been made pursuant to applicable state securities laws and those post-sale filings pursuant to applicable state and federal securities laws which the Company undertakes to file within the applicable time periods. The Company has taken all action necessary to exempt: (i) the issuance and sale of the Shares; (ii) the issuance of the Conversion Shares upon due conversion of the Series C Preferred Stock; and (iii) the other transactions contemplated by the Transaction Documents from the provisions of any anti-takeover, business combination or control share law or statute binding on the Company or to which the Company or any of its assets and properties may be subject or any provision of the Company's Articles of Organization, Bylaws or any stockholder rights agreement that is or could become applicable to the Investors as a result of the transactions contemplated hereby, including without limitation, the issuance of the Shares and the ownership, disposition or voting of the Shares by the Investors or the exercise of any right granted to the Investors pursuant to this Agreement or the other Transaction Documents.

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4.6. Financial Information. The unaudited financial statements of the Company as of and for the (a) fiscal year ended December 31, 2003 and (b) nine-month period ended September 30, 2004, attached hereto as Schedule 4.6, present fairly in all material respects the financial position of the Company as of the dates thereof and the results of operations for the periods covered thereby, and have been prepared in accordance with generally accepted accounting principles consistently applied, except for the absence of footnotes and normal recurring adjustments not customarily included in such unaudited statements (the "Financial Statements").

4.7. No Material Adverse Change. Except as identified and described on Schedule 4.7(a), since September 30, 2004, there has not been:

(i) any change in the consolidated assets, liabilities, financial condition or operating results of the Company from that reflected in the Financial Statements, except for changes (x) as a result of the Company's conduct of business in the ordinary course or as a result of the passage of time, or (y) which have not had a Material Adverse Effect, individually or in the aggregate;

(ii) any declaration or payment of any dividend, or any authorization or payment of any distribution, on any of the capital stock of the Company, or any redemption or repurchase of any securities of the Company;

(iii) any material damage, destruction or loss, whether or not covered by insurance, to any assets or properties of the Company or its Subsidiaries;

(iv) any waiver, not in the ordinary course of business, by the Company or any Subsidiary of a material right or of a material debt owed to it;

(v) any satisfaction or discharge of any lien, claim or encumbrance or payment of any obligation by the Company or a Subsidiary, except which is not material to the assets, properties, financial condition, operating results, prospects or business of the Company and its Subsidiaries, taken as a whole;

(vi) any change or amendment to the Company's Articles of Organization or Bylaws, or material change to any material contract or arrangement by which the Company or any Subsidiary is bound or to which any of their respective assets or properties is subject;

(vii) any material labor difficulties or labor union organizing activities with respect to employees of the Company or any Subsidiary;

(viii) any material transaction entered into by the Company or a Subsidiary other than in the ordinary course of business;

(ix) the loss of the services of any Key Employee, or change in the composition or duties of any executive officers of the Company or any Subsidiary;

(x) the loss or threatened loss of any customer which has had or could reasonably be expected to have a Material Adverse Effect; or

(xi) any other event or condition of any character that has had or could reasonably be expected to have a Material Adverse Effect.

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4.8. No Conflict, Breach, Violation or Default. The execution, delivery and performance of the Transaction Documents by the Company and the issuance and sale of the Shares will not (with or without the lapse of time or the giving of notice, or both) conflict with or result in a breach or violation of any of the terms and provisions of, or constitute a default under: (i) the Company's Articles of Organization or Bylaws, both as in effect on the date hereof (true and accurate copies of which have been provided to the Investors before the date hereof); or (ii)(a) any statute, rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Company, any Subsidiary or any of their respective assets or properties that would have a Material Adverse Effect, or (b) except as set forth on Schedule 4.8, any agreement or instrument to which the Company or any Subsidiary is a party or by which the Company or a Subsidiary is bound or to which any of their respective assets or properties is subject, other than a conflict, breach, violation or default which would not have a Material Adverse Effect.

4.9. Tax Matters. Each of the Company and each Subsidiary has timely prepared and filed all tax returns required to have been filed by the Company or such Subsidiary with all appropriate governmental agencies and timely paid all taxes shown as due thereon. The charges, accruals and reserves on the books of the Company in respect of taxes for all fiscal periods are adequate in all material respects, and there are no material unpaid assessments against the Company or any Subsidiary nor, to the Company's Knowledge, any basis for the assessment of any additional taxes, penalties or interest for any fiscal period or audits by any federal, state or local taxing authority except for any assessment which is not material to the Company and its Subsidiaries, taken as a whole. All taxes and other assessments and levies that the Company or any Subsidiary is required to withhold or to collect for payment have been duly withheld and collected and paid to the proper governmental entity or third party when due. There are no tax liens or claims pending or, to the Company's Knowledge, threatened against the Company or any Subsidiary or any of their respective assets or properties. Except as described on Schedule 4.9, there are no outstanding tax sharing agreements or other such arrangements between the Company and any Subsidiary or other corporation or entity. Neither the Company nor any Subsidiary is presently undergoing any audit by a taxing authority, or has waived or extended any statute of limitations at the request of any taxing authority.

4.10. Title to Properties. The Company and each Subsidiary has good and marketable title to all real properties and all other properties and assets owned by it, in each case free from liens, encumbrances and defects that would materially affect the value thereof or materially interfere with the use currently made or currently planned to be made thereof by them; and the Company and each Subsidiary holds any leased real or personal property under valid and enforceable leases with no exceptions that would materially interfere with the use currently made or currently planned to be made thereof by them.

4.11. Certificates, Authorities and Permits. The Company and each Subsidiary possess adequate certificates, authorities or permits issued by appropriate governmental agencies or bodies necessary to conduct the business now operated by it, and neither the Company nor any Subsidiary has received any notice of proceedings relating to the revocation or modification of any such certificate, authority or permit that, if determined adversely to the Company or such Subsidiary, could reasonably be expected to have a Material Adverse Effect, individually or in the aggregate.

4.12. No Labor Disputes. No material labor dispute with the employees of the Company or any Subsidiary exists or, to the Company's Knowledge, is imminent.

4.13. Intellectual Property.

(a) All Intellectual Property of the Company and its Subsidiaries is currently

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in compliance with all legal requirements (including timely filings, proofs and payments of fees), except where the failure to so comply with any of such requirements, individually or in the aggregate, would not have a Material Adverse Effect, and is valid and enforceable. Except as listed on Schedule 4.13(a), no Intellectual Property of the Company or its Subsidiaries which is necessary for the conduct of Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted has been or is now involved in any cancellation, dispute or litigation, and, to the Company's Knowledge, no such action is threatened. Except as listed on Schedule 4.13(a), no patent of the Company or its Subsidiaries has been or is now involved in any interference, reissue, re-examination or opposition proceeding.

(b) All of the licenses and sublicenses and consent, royalty or other agreements concerning Intellectual Property which are necessary for the conduct of the Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted to which the Company or any Subsidiary is a party or by which any of their assets are bound (other than generally commercially available, non-custom, off-the-shelf software application programs having a retail acquisition price of less than $10,000 per license) (collectively, "License Agreements") are valid and binding obligations of the Company or its Subsidiaries that are parties thereto and, to the Company's Knowledge, the other parties thereto, enforceable in accordance with their terms, except to the extent that enforcement thereof may be limited by bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or other similar laws affecting the enforcement of creditors' rights generally, and there exists no event or condition which will result in a material violation or material breach of or constitute (with or without due notice or lapse of time or both) a material default by the Company or any of its Subsidiaries or, to the Company's Knowledge, any other party, under any such License Agreement.

(c) The Company and its Subsidiaries own or have the valid right to use all of the Intellectual Property that is necessary for the conduct of the Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted, free and clear of all (x) liens, encumbrances or adverse claims with respect to Intellectual Property that is owned by the Company or any of its Subsidiaries, or (y) obligations to license all such owned Intellectual Property and Confidential Information, other than licenses entered into in the ordinary course of the Company's and its Subsidiaries' businesses. The Company and its Subsidiaries have a valid and enforceable right to use all third party Intellectual Property and Confidential Information used or held for use in the respective businesses of the Company and its Subsidiaries as currently conducted or as currently proposed to be conducted.

(d) The conduct of the Company's and its Subsidiaries' businesses as currently conducted and as currently proposed to be conducted does not and will not, to the Company's Knowledge, infringe any Intellectual Property rights of any third party or any confidentiality obligation owed to a third party. To the Company's Knowledge, the Intellectual Property and Confidential Information of the Company and its Subsidiaries which are necessary for the conduct of Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted are not being infringed by any third party. Except as set forth on Schedule 4.13(d), there is no litigation or order pending or outstanding or, to the Company's Knowledge, threatened, that seeks to limit or challenge or that concerns the ownership, use, validity or enforceability of any Intellectual Property or Confidential Information of the Company and its Subsidiaries and the Company's and its Subsidiaries' use of any Intellectual Property or Confidential Information owned by a third party, and, to the Company's Knowledge, there is no valid basis for the same.

(e) The consummation of the transactions contemplated hereby will not result in the alteration, loss, impairment of or restriction on the Company's or any of its Subsidiaries'

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ownership or right to use any of the Intellectual Property or Confidential Information which is necessary for the conduct of the Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted.

(f) To the Company's Knowledge, all software owned by the Company or any of its Subsidiaries, and, to the Company's Knowledge, all software licensed from third parties by the Company or any of its Subsidiaries:
(i) is free from any material defect or programming, design or documentation error; (ii) operates and runs in a reasonable and efficient business manner; and
(iii) conforms in all material respects to the specifications and purposes thereof.

(g) The Company and its Subsidiaries have taken reasonable steps to protect the Company's and its Subsidiaries' rights in their Intellectual Property and Confidential Information. Each employee, consultant and contractor who has had access to Confidential Information and Intellectual Property which is necessary for the conduct of Company's and each of its Subsidiaries' respective businesses as currently conducted or as currently proposed to be conducted has executed an agreement to maintain the confidentiality of such Confidential Information and Intellectual Property and has executed appropriate agreements that are substantially consistent with the Company's standard forms therefor. To the Company's Knowledge, there has been no material disclosure of any of the Company's or its Subsidiaries' Confidential Information or Intellectual Property to any third party without the Company's consent.

4.14. Environmental Matters. Neither the Company nor any Subsidiary:
(i) is in violation of any statute, rule, regulation, decision or order of any governmental agency or body or any court, domestic or foreign, relating to the use, disposal or release of hazardous or toxic substances or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, "Environmental Laws"); (ii) owns or operates any real property contaminated with any substance that is subject to any Environmental Laws; (iii) is liable for any off-site disposal or contamination pursuant to any Environmental Laws; and (iv) to the Company's Knowledge, is subject to any claim relating to any Environmental Laws; in each case, to the extent such violation, contamination, liability or claim has had or could reasonably be expected to have a Material Adverse Effect, individually or in the aggregate; and there is no pending or, to the Company's Knowledge, threatened investigation that might lead to such a claim.

4.15. Litigation. Except as set forth on Schedule 4.15, there are no pending actions, suits or proceedings against or affecting the Company, its Subsidiaries or any of its or their properties; and to the Company's Knowledge, no such actions, suits or proceedings are threatened or contemplated.

4.16. Insurance Coverage. Set forth on Schedule 4.16 is a true and complete list of all insurance policies maintained by the Company in force as of the date of this Agreement (including name of insurer, agent, annual premium, coverage, deductible amounts and expiration date). The Company is not in default regarding the payment of any premiums due with respect to the insurance policies on Schedule 4.16.

4.17. Brokers and Finders. Except as set forth on Schedule 4.17, no Person will have, as a result of the transactions contemplated by this Agreement or the other Transaction Documents, any valid right, interest or claim against or upon the Company or any Subsidiary for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Company.

4.18. No Directed Selling Efforts or General Solicitation. Neither the Company nor any Affiliate, nor any Person acting on its behalf has conducted any "general solicitation" or "general

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advertising" (as those terms are used in Regulation D) in connection with the offer or sale of any of the Securities.

4.19. No Integrated Offering. Neither the Company nor any of its Affiliates, nor any Person acting on its or their behalf has, directly or indirectly, made any offers or sales of any Company security or solicited any offers to buy any Company security under circumstances that would adversely affect reliance by the Company on Section 4(2) of the Securities Act for the exemption from the registration requirements imposed under Section 5 of the Securities Act for the transactions contemplated by this Agreement or the other Transaction Documents or would require such registration under the Securities Act.

4.20. Private Placement. Subject to the accuracy of the representations and warranties of the Investors contained in Section 5 hereof, the offer and sale of the Shares to the Investors as contemplated hereby is made in reliance upon available exemptions from the registration requirements of the Securities Act.

4.21. Questionable Payments. Neither the Company nor any of its Subsidiaries nor, to the Company's Knowledge, any of their respective current or former stockholders, directors, officers, employees, agents or other Persons acting on behalf of the Company or any Subsidiary, has on behalf of the Company or any Subsidiary or in connection with their respective businesses: (i) used any corporate funds for unlawful contributions, gifts, entertainment or other unlawful expenses relating to political activity; (ii) made any direct or indirect unlawful payments to any governmental officials or employees from corporate funds; (iii) established or maintained any unlawful or unrecorded fund of corporate monies or other assets; (iv) made any false or fictitious entries on the books and records of the Company or any Subsidiary; or (v) made any unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment of any nature.

4.22. Transactions with Affiliates. Except as set forth on Schedule 4.22, there are no loans, leases, royalty agreements or other continuing transactions between the Company and (a) any Person owning 5% or more of any class of capital stock of the Company, or (b) any member of the immediate family of such stockholder or an officer, employee or director of the Company, or (c) any corporation or other entity controlled by an officer, employee, director or stockholder of the Company or a member of the immediate family of such officer, employee, director or stockholder.

4.23. Disclosure. This Agreement, the other Transaction Documents and certificates furnished to the Investors or their counsel by or on behalf of the Company at the applicable Closing in connection with the transactions contemplated hereby do not contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements contained herein or therein, in light of the circumstances under which they were made, not misleading.

4.24. FDA Matters. The Company has provided the Investors with a true and accurate copy of all material correspondence with and submissions to the U.S. Food and Drug Administration (the "FDA"). The Company has not received from the FDA or any other governmental agency any other material communication, written or oral, pertaining to the Company's protocols or trials. To the Company's Knowledge, (a) neither the FDA nor any other governmental agency intends to take an adverse position or action with respect to the Company's protocols or trials, and (b) no facts or circumstances exist which would cause the FDA or any other governmental agency to take such adverse position or action.

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5. Representations and Warranties of the Investors. Each of the Investors hereby severally, and not jointly, represents and warrants to the Company on and as of the date hereof, knowing and intending that the Company rely thereon, that:

5.1. Authorization. The Investor has the requisite power and authority to enter into this Agreement, the Investor Rights Agreement and any other Transaction Document to which it is a party. The execution, delivery and performance by the Investor of the Transaction Documents to which such Investor is a party have been duly authorized and will each constitute the valid and legally binding obligation of the Investor, enforceable against the Investor in accordance with their respective terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability, relating to or affecting creditors' rights generally, and general principles of equity.

5.2. Purchase Entirely for Own Account. The Shares to be received by the Investor hereunder will be acquired for the Investor's own account, not as nominee or agent, for investment purposes only and not with a view to the resale or distribution of any part thereof in violation of the Securities Act, and the Investor has no present intention of selling, granting any participation in, or otherwise distributing the same in violation of the Securities Act. The Investor is not a registered broker-dealer or an entity engaged in the business of being a broker-dealer.

5.3. Investment Experience. The Investor acknowledges that it can bear the economic risk and complete loss of its investment in the Shares and it has such knowledge and experience in financial or business matters that it is capable of evaluating the merits and risks of the investment contemplated hereby. The Investor has significant experience in making private investments, similar to the purchase of the Shares hereunder. The Investor understands that its investment in the Shares involves a high degree of risk.

5.4. Disclosure of Information. The Investor has received all additional information related to the Company and the offer and sale of the Shares as requested by it and has had an opportunity to ask questions of and receive answers from the Company regarding the Company, its business and the terms and conditions of the offering of the Shares. Neither such inquiries nor any other due diligence investigation conducted by the Investor shall modify, amend or affect the Investor's right to rely on the Company's representations and warranties contained in this Agreement.

5.5. Reliance on Exemptions. Each Investor understands that (i) the Shares are being offered and sold in reliance upon specific exemptions from the registration requirements of the U.S. federal and state securities laws and (ii) the Company is relying upon the truth and accuracy of, and such Investor's compliance with, the representations, warranties, agreements, acknowledgements and understandings of such Investor set forth herein in order to determine the availability of such exemptions and the eligibility of such Investor to acquire the Shares. Each Investor understands that no U.S. federal or state agency or any other government or governmental agency has passed upon the validity of or made any recommendation or endorsement of the Shares.

5.6. Restricted Securities. The Investor understands that the Shares are characterized as "restricted securities" under the U.S. federal securities laws inasmuch as they are being acquired from the Company in a transaction not involving a public offering and that under such laws and applicable regulations such securities may be resold without registration under the Securities Act only in certain limited circumstances.

5.7. Legends.

(a) It is understood that certificates evidencing such Shares may bear a

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restrictive legend in the following form, as well as any other legends that may be required by a Transaction Document or applicable law:

"THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE LAWS OF ANY STATE OF THE UNITED STATES OR IN ANY OTHER JURISDICTION. THESE SECURITIES MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS (I) SUCH SECURITIES HAVE BEEN REGISTERED PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, OR (II) THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL SATISFACTORY TO IT THAT SUCH TRANSFER MAY LAWFULLY BE MADE WITHOUT REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR QUALIFICATION UNDER APPLICABLE STATE SECURITIES
LAWS."

(b) If required by the authorities of any state in connection with the issuance or sale of the Shares, certificates evidencing such Shares may bear the legend required by such state authority.

5.8. Accredited Investor. The Investor is an "accredited investor" as defined in Rule 501(a) of Regulation D.

5.9. No General Solicitation. The Investor did not learn of the investment in the Shares as a result of any "general advertising" or "general solicitation" as those terms are contemplated in Regulation D, as amended, under the Securities Act. The Investor is a resident of the jurisdiction set forth under such Investor's name on the applicable Schedule I hereto.

5.10. Brokers and Finders. Except as set forth in Schedule 5.10, no Person will have, as a result of the transactions contemplated by this Agreement or any other Transaction Document, any valid right, interest or claim against or upon the Company, any Subsidiary or any other Investor for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Investor.

6. Conditions to Closing.

6.1. Conditions to the Investors' Obligations. The obligation of the Investors to purchase the Series C Preferred Shares at the applicable Closing is subject to the fulfillment, to the satisfaction of each of the Investors intending to purchase the Series C Preferred Stock in such Closing (such intent to be manifested by such Investor's execution of a counterpart to this Agreement with respect to the applicable Closing), on or prior to the applicable Closing Date, of the following conditions, any of which may be waived in writing only by
(x) a majority of such Investors (measured by the dollar amount to be purchased by each such Investor) and (y) Cerberus:

(a) The representations and warranties made by the Company in
Section 4 hereof shall be true and correct on the applicable Closing Date. The Company shall have performed in all material respects all obligations and conditions herein required to be performed or observed by it on or prior to the applicable Closing Date;

(b) Except for any regulatory filings that, under applicable law, may be made after the applicable Closing, the Company shall have obtained or made, as the case may be, in a

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timely fashion any and all authorizations, consents, permits, approvals, registrations, filings and waivers from governmental authorities and/or other third parties that are necessary and/or appropriate for consummation of the purchase and sale of the Series C Preferred Shares at such Closing, all of which shall be in full force and effect;

(c) The Company shall have executed and delivered a counterpart to the Investor Rights Agreement to the Investors intending to purchase the Series C Preferred Stock in such Closing;

(d) No judgment, writ, order, injunction, award or decree of or by any court, or judge, justice or magistrate, including any bankruptcy court or judge, or any order of or by any governmental authority, shall have been issued, and no action or proceeding shall have been instituted by any governmental authority, or self-regulatory organization enjoining or preventing the consummation at such Closing of the transactions contemplated by this Agreement or any other Transaction Document;

(e) The Company shall have delivered to the Investors intending to purchase the Series C Preferred Stock in such Closing a certificate, dated as of the applicable Closing Date, executed by the Chief Executive Officer or Chief Operating Officer of the Company, certifying as to the fulfillment of the conditions specified in subsections (a), (b) and (d) of this Section 6.1;

(f) The Company shall have delivered to the Investors intending to purchase the Series C Preferred Stock in such Closing a certificate, dated as of the applicable Closing Date, executed by the Secretary of the Company, certifying as to: (i) the resolutions of the Board authorizing the transactions contemplated by this Agreement and the other Transaction Documents; (ii) the Articles of Organization of the Company; and (iii) the By-Laws of the Company, each as in effect as of the applicable Closing Date;

(g) The Company shall have delivered to the Investors intending to purchase the Series C Preferred Stock in such Closing a good standing certificate from the Secretary of Commonwealth of the Commonwealth of Massachusetts;

(h) The Investors intending to purchase the Series C Preferred Stock in such Closing shall have received a written legal opinion, in the form attached hereto as Exhibit C, dated as of the applicable Closing date, from Company Counsel;

(i) In the case of the Initial Closing only, Cerberus Counsel, in its capacity as escrow agent hereunder shall have received from the Investors intending to purchase the Series C Preferred Stock in such Closing funds to purchase shares of Series C Preferred Stock for an aggregate purchase price of at least $15,000,000 and the Company shall not have waived any of the conditions set forth in Section 6.2 with respect to any Initial Investor;

(j) Since March 1, 2005, there shall not have occurred a Material Adverse Change;

(k) The Company shall have in effect officers' and directors' insurance from such insurance carrier and in such amounts as are in effect on the date of this Agreement;

(l) Each officer and director of the Company shall be party to a valid, binding and enforceable indemnification agreement with the Company in the form reviewed by the Co-Lead Investors prior to the Initial Closing;

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(m) Each Key Employee and each consultant of the Company with access to Company Confidential Information shall be party to a valid, binding and enforceable confidentiality agreement with the Company in the form reviewed by the Co-Lead Investors prior to the Initial Closing;

(n) The Company shall have delivered evidence, satisfactory to the Investors intending to purchase the Series C Preferred Stock in such Closing, of the filing of the Articles of Amendment with the Secretary of the Commonwealth of Massachusetts;

(o) The Company shall have delivered to the Investors intending to purchase the Series C Preferred Stock in such Closing waivers and/or consents from the holders of the Company's Series A Convertible Preferred Stock and Series B Convertible Preferred Stock sufficient to (1) permit the issuance of the Series C Preferred Stock in accordance with the terms of this Agreement and the Articles of Amendment at such Closing, and (2) with respect to the Series B Convertible Preferred Stock, waive all rights of first offer or first refusal which such holders may otherwise have in connection with the sale and issuance of the Series C Preferred Stock at such Closing;

(p) The Company shall have amended its outstanding warrants issued to the holders of the Series B Convertible Preferred Stock, in a manner acceptable to Cerberus, so that such warrants shall remain in full force and effect and shall not terminate upon any issuance of the Series C Preferred Stock;

(r) In the case of each Follow-on Closing, (x) five calendar days shall have elapsed since the date written notice of such Follow-on Closing shall have been given by the Company to Cerberus, which notice shall identify each of the Follow-on Investors intending to purchase the Series C Preferred Stock in such Closing, and be accompanied by the Schedule I applicable to such Follow-on Closing, and (y) Cerberus shall have approved in writing of each Follow-on Investor intending to purchase the Series C Preferred Stock in such Follow-on Closing who is described in clause (y) of the definition of Follow-on Investor by executing a counterpart of such Schedule I; and

6.2. Conditions to Obligations of the Company. The Company's obligation to sell and issue the Series C Preferred Shares at a given Closing is subject to the fulfillment to the satisfaction of the Company on or prior to the applicable Closing Date of the following conditions, any of which may be waived in writing by the Company:

(a) The representations and warranties made by the Investors in Section 5 hereof shall be true and correct in all material respects on such Closing Date;

(b) Each of the Investors intending to purchase the Series C Preferred Stock in such Closing shall have executed and delivered to the Company a counterpart to this Agreement, the Investor Rights Agreement and each other Transaction Document to which such Investor is a party;

(c) Each of the Investors intending to purchase the Series C Preferred Stock in such Closing shall have delivered to Cerberus Counsel, as escrow agent hereunder, the amount set forth as the "Purchase Price" opposite such Investor's name on the applicable Schedule I attached hereto; and

(d) No judgment, writ, order, injunction, award or decree of or by any court, or judge, justice or magistrate, including any bankruptcy court or judge, or any order of or by any governmental authority, shall have been issued, and no action or proceeding shall have been instituted by any governmental authority, or self-regulatory organization enjoining or preventing the consummation at such Closing of the transactions contemplated by this Agreement or any other Transaction Document.

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7. Covenants and Agreements of the Company.

7.1. Reservation of Common Stock. The Company shall at all times reserve and keep available out of its authorized but unissued shares of Common Stock, solely for the purpose of providing for the conversion of the Series C Preferred Stock, such number of shares of Common Stock as shall from time to time equal the number of shares sufficient to permit the conversion of the Series C Preferred Stock issued pursuant to this Agreement in accordance with their respective terms.

7.2. No Conflicts. The Company will not take any action, enter into any agreement or make any commitment that would conflict or interfere in any material respect with the Company's obligations to the Investors under the Transaction Documents.

7.3. Unlegended Certificates. From and after the earlier of: (i) the registration of the Shares for resale pursuant to the Investor Rights Agreement; and (ii) the time when the Company receives from its legal counsel a written opinion that the Shares are then eligible for transfer pursuant to Rule 144(k) promulgated under the Securities Act, the Company shall, upon an Investor's written request (the "Certificate Request"), promptly cause certificates evidencing such Shares to be replaced with certificates which do not bear any restrictive legends. When the Company is required to cause unlegended certificates to replace previously issued legended certificates, if unlegended certificates are not delivered to an Investor within three (3) Business Days of submission by that Investor of legended certificate(s) to the Company's transfer agent together with a representation letter in customary form, the Company shall be liable to the Investor for liquidated damages equal to 1.5% of the aggregate market price (i.e., the highest closing price during such three day period) of the Shares evidenced by such certificate(s) for each 10-day period (or portion thereof) beyond such three (3) Business Day-period that the unlegended certificates have not been so delivered. Notwithstanding the foregoing, such three (3) Business Day-period shall be extended until the Company or its transfer agent has received from the Investor such information as is necessary for the issuance of the unlegended certificates in accordance with applicable Federal and state securities laws and as is reasonably requested in writing by the Company promptly, and in no even more than one (1) Business Day, following the Company's receipt of such Investor's Certificate Request. The Company shall pay such amount(s) to the Investor upon demand therefor, and such payment shall be in addition to, and not in lieu of, all other remedies and rights available to such Investor.

7.4. Insurance. Without the approval of a majority of the Board (which approval includes the affirmative vote of the Series C Director), the Company shall not materially reduce the insurance coverages described in Section 4.16, including, without limitation, the directors' and officer's insurance.

7.5. Employment Agreements. The Company shall maintain employment and non-compete agreements with all of its officers, in the form reviewed by the Co-Lead Investors prior to the Initial Closing, and shall not amend any such agreements except in any manner that benefits the Company or as approved by the Board (which approval includes the affirmative vote of the Series C Director).

7.6. Confidentiality Agreements. The Company shall maintain confidentiality agreements with each Key Employee and each consultant of the Company with access to Confidential Information, in the form reviewed by the Co-Lead Investors prior to the Initial Closing, and shall not amend any such agreements except in any manner that benefits the Company or does not reduce the confidentiality protection thereof, in each case, as approved by the Board (which approval includes the affirmative vote of the Series C Director).

7.7. Compliance with Laws. The Company will comply in all material respects with

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all applicable laws, rules, regulations, orders and decrees of all governmental authorities, except to the extent non-compliance would not have a Material Adverse Effect.

7.8. Use of Proceeds. The proceeds from the sale of the Shares shall be used for the payment of expenses related to the transactions contemplated hereby and for general working capital purposes consistent with the Company's budget approved by the Board as of the Initial Closing.

7.9. Hatch-Waxman Act. The Company shall apply to qualify each drug for which it seeks FDA approval for the marketing exclusivity provisions of the Hatch-Waxman Act in Sections 505(j)(5)(D) and/or 505(c)(3)(D) of the FDCA,to the maximum extent permitted by such laws, by taking the following steps, at its own expense: (i) submitting patent information to the FDA in the form required by the FDA to be included in a NDA; (ii) resubmitting patent information to the FDA within 30 days after approval of an NDA or supplement to identify the patents that apply to the drug substance (active ingredient), drug product (formulation and composition) or approved method of use, actually approved; (iii) filing with the FDA within 30 days after the issuance of the patent described in clause
(ii), the information required in the form of a supplement to the approved NDA if a patent that applies to the drug substance, drug product or approved method of use which is actually approved, issues after approval of the NDA; (iv) submitting with the NDA prior to its approval (1) a statement that the applicant is claiming the exclusivity described in the first sentence of this Section 7.9,
(2) a reference to the appropriate paragraph under 21 C.F.R. 314.08 that supports its claim; (3) if the Company claims exclusivity under Sec. 21 C.F.R. 314.108(b)(2), information to show that, to the best of its knowledge or belief, a drug has not previously been approved under Section 505(b) of the FDCA containing any active moiety in the drug for which the Company is seeking approval; if the company claims exclusivity under 21 C.F.R. 314.108(b)(4) or
(b)(5), information sufficient to show that the application contains new clinical investigations that are essential to approval of the application or supplement and were conducted or sponsored by the Company; (v) obtaining and maintaining without interruption all U.S. and foreign patent(s) that apply to each drug substance, drug product or approved method of use, approved by the FDA; (vi) taking any and all legal action permitted by applicable law to prosecute patent infringement claims against sponsors of Abbreviated New Drug Applications, Abbreviated New Animal Drug Applications or New Drug Applications under Section 505(b)(2) of the FDCA ("paper NDA's"); and (vii) taking such other reasonable steps as may be necessary or required by applicable law or regulation, as may be in effect from time to time, in order to qualify for the aforesaid marketing exclusivity provisions.

7.10 Recordation of Patent Assignments. Promptly following, and in any event within 30 days after, the Initial Closing Date, the Company will file patent assignment(s) for recording accompanied by certificate(s) issued by appropriate authorities showing a change of name or merger and the appropriate recordation form cover sheet with the appropriate foreign and domestic authorities, including, without limitation, the U.S. Patent & Trademark Office, reflecting the change of the Company's name from "Biostream, Inc." to "Molecular Insight Pharmaceuticals, Inc." with respect to all patents, foreign and domestic, previously assigned to the Company to establish a clear chain of title for each patent assigned to the Company, and within six (6) months after the Initial Closing Date, the Company will provide the Co-Lead Investors with U.S. Patent & Trademark Office official evidence of each such filing. The Company shall diligently pursue, and use commercially reasonable efforts to complete, the performance of its obligations under this Section 7.10.

7.11 Amendment of Licenses due to name change. Promptly following, and in any event within one (1) year after, the date of this Agreement, the Company will obtain, and provide copies to the Co-Lead Investors of, duly executed, valid, binding and enforceable amendments to: (x) that certain License Agreement, effective December 15, 2000, between Biostream, Inc., as licensee, and The Board of Governors of the University of Western Ontario, to reflect the change of the Company's name from "Biostream, Inc." to "Molecular Insight Pharmaceuticals, Inc."; and (y) that certain Research Agreement

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and Exclusive License, effective December 29, 1997, and that certain Exclusive License Agreement, effective March 1, 2000, between Georgetown University, as licensor, and Zebra Pharmaceuticals, Inc., as licensee, to reflect the merger of Zebra Pharmaceuticals, Inc. into Biostream, Inc. and the change of the Company's name from "Biostream, Inc." to "Molecular Insight Pharmaceuticals, Inc." The Company shall diligently pursue, and use commercially reasonable efforts to complete, the performance of its obligations under this Section 7.11.

8. Survival and Indemnification.

8.1. Survival. All representations, warranties, covenants and agreements contained in this Agreement shall be deemed to be representations, warranties, covenants and agreements as of the date hereof and shall survive until the later to occur of (x) 30 days after delivery to Cerberus of the Company's audited financial statements, together with the auditors written opinion thereon, for the first fiscal year ended after the Initial Closing and
(y) 15 months after the Initial Closing; provided, however, that the provisions contained in: (a) Section 4.4 and Section 8.2(ii) hereof shall survive indefinitely; (b) Sections 4.9 and 4.14 shall survive until 90 days after the applicable statute of limitations.

8.2. Indemnification. The Company shall indemnify and hold harmless each Investor and its Affiliates and the directors, officers, employees, investors, partners and agents of each Investor and its Affiliates, from and against any and all losses, claims, damages, liabilities and expenses incurred by any such Person (including without limitation reasonable attorney fees and disbursements and other expenses incurred in connection with investigating, preparing or defending any action, claim or proceeding, pending or threatened and the costs of enforcement hereof) (collectively, "Losses") as a result of (i) any breach of representation, warranty, covenant or agreement made by, or to be performed on the part of, the Company under the Transaction Documents, or (ii) the recall of any of the Company's products (but only to the extent such Investor would be personally liable), and, in each case, will reimburse any such Person for all such amounts as they are incurred by such Person.

8.3. Conduct of Indemnification Proceedings. Promptly after receipt by any Person (the "Indemnified Person") of notice of any demand, claim or circumstances which would or might give rise to a claim or the commencement of any action, proceeding or investigation in respect of which indemnity may be sought pursuant to Section 8.2, such Indemnified Person shall promptly notify the Company in writing and the Company shall assume and control the defense thereof, including the employment of counsel reasonably satisfactory to such Indemnified Person, and shall assume the payment of all fees and expenses in connection with such defense and such counsel; provided, however, that the failure of any Indemnified Person to so notify the Company shall not relieve the Company of its obligations hereunder except to the extent that the Company is actually and materially prejudiced by such failure to notify. In any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless: (i) the Company and the Indemnified Person shall have mutually agreed to the retention of such counsel; or (ii) in the reasonable judgment of counsel to such Indemnified Person (x) representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them or (y) if there are one or more defenses available to such Indemnified Person that is/are not available to the Company. Without the prior written consent of the Indemnified Person, which consent shall not be unreasonably withheld, delayed or conditioned, the Company shall not effect any settlement of any pending or threatened action, claim or proceeding, with respect to any Indemnified Person, unless such settlement includes an unconditional release of such Indemnified Person from all liability arising out of such proceeding.

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9. Miscellaneous.

9.1. Successors and Assigns. This Agreement may not be assigned by a party hereto without the prior written consent of the Company or the Investors who participated in the same Closing, as applicable; provided, however, that an Investor may assign its rights and delegate its duties hereunder in whole or in part, without the prior written consent of the Company, to an Affiliate or the other Investors (regardless of the Closing in which any such Investor purchased its Series C Preferred Stock), provided, that, no such assignment shall be effective or confer any right on any such assignee unless, prior to such assignment, the assignee agrees in writing that such assignee will be bound by all provisions binding on such Investor hereunder. The provisions of this Agreement shall inure to the benefit of and be binding upon the respective permitted successors and assigns of the parties. Except for Cerberus Counsel, which is an express intended third-party beneficiary hereof for the limited purpose of Section 3.2 and Section 9.5 of this Agreement, and except for any other provisions of this Agreement expressly to the contrary, nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

9.2. Counterparts: Faxes. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement may also be executed via facsimile, which shall be deemed an original.

9.3. Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

9.4. Notices. Unless otherwise provided, any notice required or permitted under this Agreement shall be given in writing and shall be deemed effectively given as hereinafter described: (i) if given by personal delivery, then such notice shall be deemed given upon such delivery; (ii) if given by telex or telecopier, then such notice shall be deemed given upon receipt of confirmation of complete transmittal with a confirming copy by first class mail;
(iii) if given by mail, then such notice shall be deemed given upon the earlier of (A) receipt of such notice by the recipient or (B) three (3) days after such notice is deposited in first class mail, postage prepaid; and (iv) if given by an internationally recognized overnight air courier, then such notice shall be deemed given one (1) Business Day after delivery to such carrier. All notices shall be addressed to the party to be notified at the address as follows, or at such other address as such party may designate by ten (10) days' advance written notice to the other party:

If to the Company:

Molecular Insight Pharmaceuticals, Inc.
160 Second Street
Cambridge, Massachusetts 02142
Attn: Mr. David Barlow
Fax:(617)492-5664

With a copy to:

Foley & Lardner LLP
111 Huntington Avenue
26th Floor

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Boston, Massachusetts 02199 Attn: Gabor Garai, Esq.

Fax: (617)342-4001

If to any of the Investors:

to the addresses set forth on the applicable Schedule I
attached hereto.

9.5. Expenses. The Company shall pay the reasonable fees and expenses of Cerberus Counsel in connection with the transactions contemplated by this Agreement (the "Cerberus Counsel Fees"), with respect to the Initial Closing, in an amount not to exceed $60,000 through the Initial Closing Date, and with respect to each Follow-on Closing, in an amount not to exceed $7,500 through each such Follow-on Closing Date, which Cerberus Counsel Fees shall include, without limitation, the fees and expenses associated with the negotiation, preparation and execution and delivery of this Agreement and the other Transaction Documents. On the sooner of the Closing or the Escrow Termination Date, Cerberus Counsel may apply such retainer to Cerberus Counsel Fees and return the excess thereof, if any, to the Company. Except as set forth above, the Company and the Investors shall each bear their own expenses in connection with the negotiation, preparation, execution and delivery of this Agreement. In the event that legal proceedings are commenced by any party to this Agreement against another party to this Agreement in connection with this Agreement or the other Transaction Documents, the party or parties which do not prevail in such proceedings shall severally, but not jointly, pay their pro rata share of the reasonable attorneys' fees and other reasonable out-of-pocket costs and expenses incurred by the prevailing party in such proceedings.

9.6. Amendments and Waivers. This Agreement shall not be amended and the observance of any term of this Agreement shall not be waived (either generally or in a particular instance and either retroactively or prospectively) without the prior written consent of (i) the Company and (ii) at least a majority of the Investors holding a majority of the Series C Preferred Stock (which majority must include Cerberus); provided, however, that any provision hereof which impairs the rights or increases the obligations of a specific Investor disproportionately to other Investors shall not be amended or waived without the prior written consent of the Company and that particular Investor; provided, further, that any provision affecting the rights or obligations of Cerberus Counsel, shall not be waived or amended without the prior written consent of Cerberus Counsel. Any amendment or waiver effected in accordance with this Section 9.6 shall be binding upon each holder of any Shares purchased under this Agreement at the time outstanding, each future holder of all such Shares, and the Company.

9.7. Publicity. No public release or announcement concerning the transactions contemplated by this Agreement or any other Transaction Document shall be issued by the Company or the Investors without the prior consent of the Company (in the case of a release or announcement by any of the Investors) or Cerberus (in the case of a release or announcement by the Company) (which consents shall not be unreasonably withheld), except as such release or announcement may be required by law, in which case the Company or the Investors, as the case may be, shall allow the Investors or the Company, as applicable, to the extent reasonably practicable in the circumstances, reasonable time to comment on such release or announcement in advance of such issuance.

9.8. Severability. Any provision of this Agreement that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof but shall be interpreted as if it were written so as to be enforceable to the maximum extent permitted by applicable law, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render

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unenforceable such provision in any other jurisdiction. To the extent permitted by applicable law, the parties hereby waive any provision of law which renders any provision hereof prohibited or unenforceable in any respect.

9.9. Entire Agreement. This Agreement, including the Exhibits and Schedules (including without limitation all Disclosure Schedules and, in the case of a Follow-on Closing, each subsequent version of Schedule I), and the other Transaction Documents constitute the entire agreement among the parties hereof with respect to the subject matter hereof and thereof and supersede all prior agreements and understandings, both oral and written, between the parties with respect to the subject matter hereof and thereof.

9.10. Further Assurances. The parties shall execute and deliver all such further instruments and documents and take all such other actions as may reasonably be required to carry out the transactions contemplated hereby and to evidence the fulfillment of the agreements herein contained.

9.11. Governing Law; Consent to Jurisdiction. This Agreement shall be governed by, and construed in accordance with, the internal laws of the State of New York without regard to the choice of law principles thereof, except that the Shares and the designations, powers, preferences, rights of, and the qualification, limitations and restrictions on, the Shares issued pursuant to this Agreement shall be governed by the laws of the Commonwealth of Massachusetts. Each of the parties hereto irrevocably submits to the jurisdiction of the courts of the State of New York located in New York County and the United States District Court for the Southern District of New York for the purpose of any suit, action, proceeding or judgment relating to or arising out of this Agreement and the transactions contemplated hereby. Service of process in connection with any such suit, action or proceeding may be served on each party hereto anywhere in the world by the same methods as are specified for the giving of notices under this Agreement. Each of the parties hereto irrevocably consents to the jurisdiction of any such court in any such suit, action or proceeding and to the laying of venue in such court. Each party hereto irrevocably waives any objection to the laying of venue of any such suit, action or proceeding brought in such courts and irrevocably waives any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. THE COMPANY AND EACH OF THE INVESTORS HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING RELATING TO OR ARISING OUT OF THIS AGREEMENT OR ANY OTHER TRANSACTION DOCUMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY.

9.12 Independent Nature of Investors' Obligations and Rights. Except as expressly provided herein and therein, the obligations of each Investor under this Agreement and each other Transaction Document are several and not joint with the obligations of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock), and no Investor shall be responsible in any way for the performance of the obligations of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) under this Agreement or any other Transaction Document. The decision of each Investor to purchase Series C Preferred Stock pursuant to this Agreement and the other Transaction Documents has been made by such Investor independently of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock). Nothing contained herein or in any other Transaction Document, and no action taken by any Investor (including, without limitation, any of the Co-lead Investors) pursuant hereto or thereto, shall be deemed to constitute the Investors (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Investors are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by this Agreement or the other Transaction Documents. Each Investor acknowledges that no other Investor (including, without limitation, any of the Co-lead

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Investors, and regardless of the Closing at which such Investor purchased its Series C Preferred Stock) has acted as agent for such Investor in connection with making its investment hereunder and that no Investor (including, without limitation, any of the Co-lead Investors, and regardless of the Closing at which such Investor purchased its Series C Preferred Stock) will be acting as agent of such Investor in connection with monitoring its investment in the Shares or enforcing its rights under this Agreement or the other Transaction Documents. Each Investor shall be entitled to independently protect and enforce its rights, including, without limitation, the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) to be joined as an additional party in any proceeding for such purpose. The Company acknowledges that each of the Investors has been provided with the same Transaction Documents for the purpose of closing a transaction with multiple Investors at multiple Closings and not because it was required or requested to do so by any Investor. Notwithstanding anything contained in this Agreement or any other Transaction Document to the contrary, neither of the Co-Lead Investors shall have any duty, fiduciary or otherwise, to any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) by virtue of such Investor serving as a Co-Lead Investor or otherwise.

[signature page follows]

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[COMPANY SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

MOLECULAR INSIGHT
PHARMACEUTICALS, INC.

By: /s/ David S. Barlow
    ----------------------------------
Name:
Title:

-28-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

CERBERUS PARTNERS, L.P.

By: Cerberus Associates, LLC,
its General Partner

By: /s/ Seth Plattus
    ----------------------------------
    Seth Plattus
    Managing Director

MEDCAP PARTNERS, L.P.

By:___________________________________
Name: ________________________________
Title: _______________________________

-29-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Andrew R. Midler Family Trust 5/99
Name of Investor

By: /s/ Andrew R. Midler
    ----------------------------------
Name: Andrew R. Midler
Title: Trustee

-30-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

John D. Singer, Esq.
Name of Investor

By: /s/ John D. Singer, Esq.
    ---------------------------
Name: John D. Singer, Esq.
Title: ________________________

-31-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

MICHAEL C. DEUTSCH
Name of Investor

By: /s/ Michael C. Deutsch
    ---------------------------
Name: Michael C. Deutsch
Title:

-32-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

PATRICIA T. POITRAS REVOCABLE TRUST       James W. Poitras Revocable Trust V/A
V/A 29/2004                               -------------------------------------
                                          Name of Investor

/s/ Patricia T. Poitras                   By: /s/ James W. Poitras
-------------------------                     ---------------------------------
Name: Patricia T. Poitras                 Name: James W. Poitras
Title: Trustee                            Title: Trustee

-33-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Carol Frank
Name of Investor

By:

Name:
Title:

-34-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Benjamin M. Frank Trust
Name of Investor

By: /s/ Benjamin M. Frank
    -------------------------------
Name: Benjamin M. Frank
Title: Trustee

-35-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

[ILLEGIBLE]
Name of Investor

By:___________________________________
Name: ________________________________
Title: _______________________________

-36-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Rajpal Sandhu and Mary Henry
Name of Investor

By: /s/ Rajpal Sandhu & Mary Henry
    ----------------------------------
Name: RAJPAL SANDHU & MARY HENRY
Title:
       -------------------------------
420 FAMILY FARM ROAD
WOODSIDE CA - 94062
650-529-0606
Raj@RajSandhu.com

-37-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:


Name of Investor

By: /s/ James Lenehan
    __________________________________
Name: James T. Lenehan
Title: _______________________________

-38-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Lionel N. Sterling Revocable Trust
Name of Investor

By: /s/ Lionel N. Sterling
    ----------------------------------
Name: Lionel N. Sterling
      --------------------------------
Title: Trustee
       -------------------------------

I am purchasing a total of 1,750 Series C Preferred Stock @ $202.00 per share for a total investment of $353,500. The split between those purchased as a Series B investor or as a Series C investor, I understand is moot.

-39-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Richard Simon
Name of Investor

By: /s/ Richard Simon
    ----------------------------------
Name: Richard Simon
      --------------------------------
Title:________________________________

-40-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

American Durham L.P.
Name of Investor

By: /s/ T.K. Duggan
    ---------------------------------
Name: T.K. Duggan
      -------------------------------
Title: Managing Principal
       ------------------------------

-41-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

International Durham, Ltd.
Name of Investor

By: /s/ T.K. Duggan
    ---------------
Name: T.K. Duggan
      -------------------------------
Title: Managing Principal
       ------------------------------

-42-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Institutional Benchmarks Master Fund
Name of Investor

By: /s/ Garry Crowder
    ------------------
Name: Garry Crowder
      -------------------------------
Title: Director
       ------------------------------

-43-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Richard Simon
Name of Investor

By: /s/ Richard Simon
    -----------------
Name: Richard Simon
      --------------------------------
Title:
       -------------------------------

-44-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

William R. Ebsworth
Name of Investor

By: /s/ William R. Ebsworth
    -----------------------
Name:
      -------------------------------
Title:
       ------------------------------

-45-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ Alan N. Berro
-------------------------------------

Name of Investor

By: /s/ ALAN N. BERRO
    -----------------
Name:
      -------------------------------
Title:
       ------------------------------

-46-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Wesley M. Nida
Name of Investor

By:

Name:
Title:

-47-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

THE RAPTOR GLOBAL PORTFOLIO LTD.

Name of Investor By: Investment Corporation, Investment Advisor

By: /s/ William T. Flaherty
    ----------------------------------
Name: William T. Flaherty
      --------------------------------
Title: Managing Director
       -------------------------------

-48-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

THE TUDOR BVI GLOBAL PORTFOLIO LTD.

Name of Investor By: Tudor Investment Corporation, Trading Advisor

By: /s/ William T. Flaherty
    -----------------------
Name:  William T. Flaherty
       --------------------
Title: Managing Director
       --------------------

-49-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

TUDOR PROPRIETARY TRADING, L.L.C.
Name of Investor

By: /s/ William T. Flaherty
    -----------------------
Name:  William T. Flaherty
       --------------------
Title: Managing Director
       --------------------

-50-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ William C. Smith (WILLIAM C. SMITH)
---------------------------------------
Name of Investor

/s/ Dana Davis Smith (DANA DAVIS SMITH)
---------------------------------------

By:
    -----------------------------------
Name:
       --------------------------------
Title:
       --------------------------------
Joint Tenants with Right of
Survivorship

-51-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

THE ALTAR ROCK FUND L.P.
Name of Investor

By: Tudor Investment Corporation, General Partner

By: /s/ William T. Flaherty
    -----------------------
Name:  William T. Flaherty
       --------------------
Title: Managing Director
       --------------------

-52-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ June R. Frank, Trustee
--------------------------------------
Name of Investor

By: June R. Frank Revocable Trust
dated August 13, 2001 Name:
Title:

-53-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ John C. Otsuki
-------------------------------------
Name of Investor

By:
Name: John C. Otsuki
Title:

-54-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

MedCap Partners L.P.
Name of Investor

By: /s/ [ILLEGIBLE]
    ---------------
Name: [ILLEGIBLE]
      -------------------------------
Title: Managing Member of the GP
       ------------------------------

-55-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

MedCap Master Fund, L.P.
Name of Investor

By: /s/ [ILLEGIBLE]
    ---------------
Name: [ILLEGIBLE]
      -------------------------------
Title: Managing Member of the GP
       ------------------------------

-56-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ Kenneth L. Rubin
-------------------------------------
Name of Investor

By: Kenneth Rubin Individually Name:
Title:

To Purchase 620 shares of Series C Convertible Preferred Stock at a Purchase Price of $202 per share. Investment proceeds $125,240.

-57-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

WILLIAM P. RICE
Name of Investor

By: /s/ William P. Rice
    ---------------------------
Name: WILLIAM P. RICE
     --------------------------
Title:
      -------------------------

-58-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

JAMES J. GOLL
Name of Investor

By: /s/ James J. Goll
    -------------------------------
Name: James J. Goll
      -----------------------------
Title:
       ----------------------------
       (203) 656-0228

-59-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ James M. Hirshberg
    ----------------------------------
Name of Investor

By: /s/ James M. Hirshberg
    ----------------------------------
Name: JAMES M. HIRSHBERG
      --------------------------------
Title:
       -------------------------------

-60-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

Dana G. Doe
Name of Investor

By: /s/ Dana G. Doe
    ----------------------------------
Name:
      --------------------------------
Title:
       -------------------------------

-61-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

INVESTOR:

/s/ Daniel Frank
    _________________________
Name of Investor

By: _________________________
Name: DANIEL FRANK
     ________________________

Title:_______________________

-62-

Exhibit 10.3

AMENDED AND RESTATED VOTING AGREEMENT

THIS AMENDED AND RESTATED VOTING AGREEMENT is dated as of March 29, 2005 by and among Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation (the "Company"), the holders of the Company's Series A Convertible Preferred Stock set forth on the signature page hereto (the "Series A Holders"), the holders of the Company's Series B Convertible Preferred Stock set forth on the signature page hereto (the "Series B Holders"), the holders of the Company's Series C Convertible Preferred Stock set forth on the signature page hereto (the "Series C Holders"), and certain holders of the Company's Common Stock as set forth on the signature page hereto (the "Common Stockholders" and together with the Series C Holders, Series B Holders and the Series A Holders, the "Stockholders").

WHEREAS, the Company and certain holders of its Common Stock, Series A Convertible Preferred Stock and Series B Convertible Preferred Stock previously entered into a Voting Agreement dated March 4, 2004 (the "Prior Agreement") which provided, inter alia, for certain voting agreements relating to the election of members to the Company's Board of Directors (the "Board of Directors"); and

WHEREAS, the Company desires to sell to the Series C Holders, and the Series C Holders desire to purchase, shares of Series C Convertible Preferred Stock ("Series C Preferred Stock") and, as a condition to such purchase and sale, the Series C Holders require certain changes to the Prior Agreement.

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein and the investment by the Series C Holders under that certain Stock Purchase Agreement (as defined below), the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

Section 1. Election of Directors. At any time at which stockholders of the Company have the right to, or vote for or consent in writing to, the election of directors of the Company, the Stockholders hereby agree to vote, or consent in writing as to, all shares of capital stock of the Company then owned by them in favor of the following actions to:

(a) cause the election to the Board of Directors of one (1) representative designated by David Barlow ("Series A Director"), who shall initially be David Barlow; provided, however that if David Barlow is removed as the Series A Director for cause (as defined in Section 1(h) below) then the Series A Director shall be designated by the Series A Holders holding a majority of the shares of the Series A Convertible Preferred Stock; and

(b) cause the election to the Board of Directors of one (1) representative designated by Cerberus Partners, L.P. (the "Series B Director"), who shall initially be Daniel Frank and who shall thereafter be selected by Cerberus Partners, L.P.; and


(c) subject to clause (i) below, cause the election to the Board of Directors of one (1) representative designated by Cerberus Partners, L.P. (the "Series C Director" and, together with the Series A Director and the Series B Director, the "Investor Directors"), who shall initially be Andrew Jay; and

(d) cause the election to the Board of Directors of one (1) member who shall be the President of the Company (the "Management Director"), who shall initially be John Babich; provided that if the Company shall not have a President, such position held by the Chief Executive Officer of the Company or, if there is no President or Chief Executive Officer then serving for the Company, such individual serving in a similar capacity; and

(e) cause the election to the Board of Directors of three (3) members with appropriate industry experience who shall be designated by the President of the Company in consultation with the senior management of the Company and approved by the Series B Director, which approval shall not be unreasonably withheld or delayed (the "Industry Directors"), who shall initially be Harry Stylli, Kim Lamon and William Eckelman.

(f) The Company shall cause the nomination for election to the Board of Directors of the individuals set forth in clauses (a) through and including
(e) above. Each of the directors designated in this Section 1 shall be elected at any annual or special meeting of stockholders (or by written consent in lieu of a meeting of stockholders) and shall serve until his or her successor is elected and qualified, or until his or her earlier resignation or removal.

(g) The Board of Directors shall remain seven (7) members unless changed by the vote or written consent of (i) the holders of at least fifty percent (50%) of the then-outstanding shares of capital stock, with all classes voting together as a single class, (ii) the holders of at least fifty percent (50%) of the Series A Convertible Preferred Stock, (iii) the holders of at least fifty percent (50%) of the Series B Convertible Preferred Stock and (iv) the holders of at least fifty percent (50%) of the Series C Preferred Stock (the vote or consent required by clauses (i) through (iv) being the "Requisite Vote").

(h) For purposes of Section 1(a), "cause" shall mean either (i) the conviction of, or pleading of nolo contendre to, a felony or (ii) the commission of an act of fraud or embezzlement, in each case, by David Barlow.

(i) So long as Siemens Venture Capital GmbH ("Siemens") continues to own Series C Preferred Stock having an aggregate Series C Stated Value of at least Three Million Dollars ($3,000,000), Siemens shall be entitled to appoint the Series C Director (when so appointed by Siemens, the Series C Director shall be referred to as the "Siemens Director"); provided, however, that, upon a Removal Event, Siemens shall immediately cease to have the right to appoint the Series C Director and the Siemens Director shall be automatically and immediately, without the need for any further corporate or Board of Directors action or deed, removed from the Board of Directors. In the event of the occurrence of a Removal Event

-2-

described in clause (i) of the definition of Removal Event only, Siemens shall once again have the right of appointment of the Series C Director if the Board of Directors, acting at a duly called meeting and/or by written consent, adopts a resolution abandoning, canceling or ending the Removal Event. This right to appoint the Series C Director is personal to Siemens and, notwithstanding anything to the contrary herein or in any of the Transaction Documents (as defined in the Stock Purchase Agreement), such right shall not be assignable by Siemens, including without limitation, to any transferee of Series C Preferred Stock (or the Common Stock issuable upon conversion thereof) by Siemens. If the Siemens Director shall be removed from the Board of Directors pursuant to a Removal Event as set forth in this clause (i), the Company shall provide the Siemens Director with prompt written notice thereof (without any obligation to disclose the details of the applicable Removal Event), but the failure to give any such notice shall not be a condition to, or otherwise serve as a basis to prevent, any such removal. For purposes of Sections 1 and 3 herein, the following definitions shall apply:

(1) "Co-Lead Investors" shall mean Cerberus Partners, L.P. and MedCap Partners, L.P.

(2) "Qualified Public Offering" shall mean the closing of a firm commitment underwritten public offering of shares of the Company's Common Stock pursuant to a registration statement filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended, on form S-1 or its equivalent, in which the Company's Common Stock is offered and sold to the public at an initial public offering price equal to at least $5.00 per share, with aggregate gross proceeds to the Company of not less than $30 million.

(3) "Removal Event" shall mean the soonest to occur of: (i) the adoption of a resolution by the Board of Directors, acting at a duly called meeting and/or by written consent, taking any action to pursue consideration of any merger, consolidation, sale, lease or exchange of substantially all of its assets, sale or exchange of its capital stock, or any other similar business transaction involving the Corporation; (ii) June 30, 2007; and (iii) a Qualified Public Offering.

(4) "Series C Stated Value" shall mean, with respect to each shares of Series C Preferred Stock, $202.00, which amount shall be subject to appropriate adjustment in the event of a stock dividend, stock split, reverse stock split, reclassification, stock combination or other recapitalization affecting the Series C Preferred Stock, all in accordance with the Company's Articles of Organization, as amended to date.

(5) "Stock Purchase Agreement" shall mean that certain Stock Purchase Agreement by and between the Company and the Series C Holders dated March 29, 2005.

Section 2. Vacancies and Removal.

(a) Series A Director. The Series A Director may be removed during his or her term of office, with or without cause, by and only by the affirmative vote or written consent

-3-

of the holders of a majority of the then-outstanding shares of Series A Convertible Preferred Stock. Each of the Stockholders agrees to, and shall, vote all of its shares of capital stock in the same manner as the vote cast or consent given by the holders of the majority of the Series A Convertible Preferred Stock on the matter described in the foregoing sentence. Any vacancy in the office of a Series A Director shall be filled by a person designated pursuant to the terms of Section 1(a) above and each of the Stockholders agrees to vote, and shall vote, all of its shares of capital stock of the Company in favor of such person.

(b) Series B Director. The Series B Director may be removed during his or her term of office, with or without cause, by and only by the affirmative vote or written consent of Cerberus Partners, L.P. Each of the Stockholders agrees to, and shall, vote all of its shares of capital stock in the same manner as the vote cast or consent given by Cerberus Partners, L.P. on the matter described in the foregoing sentence. Any vacancy in the office of the Series B Director shall be filled by a person designated pursuant to Section 1(b) above and each of the Stockholders agrees to, and shall, vote all of its shares of capital stock of the Company in favor of such person.

(c) Series C Director. The Series C Director may be removed during his or her term of office, with or without cause, by and only by the affirmative vote or written consent of Cerberus Partners, L.P.; provided, however, that if Siemens has the right to appoint the Series C Director pursuant to Section 1(i) then such Siemens Director may only be removed during his or her term of office, with or without case, by and only by the affirmative vote or written consent of Siemens. Each of the Stockholders agrees to, and shall, vote all of its shares of capital stock in the same manner as the vote of or consent by Cerberus Partners, L.P. or Siemens, as the case may be, on the matter described in the foregoing sentence. Any vacancy in the office of the Series C Director shall be filled by a person designated pursuant to Section 1(c) above and each of the Stockholders agrees to, and shall, vote all of its shares of capital stock of the Company in favor of such person.

(d) Management Director. The Management Director may be removed during his or her term of office, with or without cause, by the affirmative vote of a majority of the members of the Board of Directors if such Management Director no longer serves as the Company's President (or in a similar capacity pursuant to Section 1(d) above) or by the affirmative vote or written consent of the holders of a majority of the outstanding shares of the Series A Stock, Series B Stock and Series C Stock voting together as a single class if such Management Director no longer serves as Company's President (or in a similar capacity pursuant to Section 1(d) above). Any vacancy in the office of the Management Director shall be filled by a vote of the majority of the Board of Directors consistent with the provisions of Section 1(d) above or by a vote of the majority of the then-outstanding shares of capital stock of the Company, and each of the Stockholders agrees to, and shall, vote all of its shares of capital stock in favor of such person.

-4-

(e) Industry Directors. Any Industry Director may be removed during his or her term of office, with or without cause, by and only by the affirmative vote of a majority of the members of the Board of Directors (which majority shall include at least two of the Investor Directors) or by the affirmative vote or written consent of the holders of a majority of the outstanding shares of the Series A Stock, Series B Stock and Series C Stock voting together as a single class. Any vacancy in an office of an Industry Director shall be filled by a person designated by the President of the Company in consultation with the senior management of the Company and approved by the Series B Director, such approval not to be unreasonably withheld or delayed, and each of the Stockholders agrees to, and shall, vote all of its shares of capital stock in favor of such person.

Section 3. Observer Rights. So long as all or any portion of the Series C Preferred Stock is outstanding, the Co-Lead Investors shall have the right to appoint one representative (a "Representative") to attend as an observer all meetings of the Board of Directors (and each committee meeting thereof); provided, that, in the case of telephonic meetings conducted in accordance with the Company's by-laws and applicable law, the Representative shall be given the opportunity to participate in such telephonic meetings to the same extent other directors are permitted to participate. The Co-Lead Investors may replace their Representative from time to time, and each such replacement shall be deemed a "Representative" for purposes of this Section 3. The Co-Lead Investors shall be required to furnish the name and address of its Representative (or any such replacement) to the Company upon request therefore. The Company shall give each Representative written notice of every meeting of its Board of Directors (and any committee meeting thereof) at the same time and in the same manner as notice is given to the directors of the Company. The Company shall bear, and reimburse each Representative for, the reasonable costs of such Representative's attendance at or participation in any meetings of the Board of Directors. Each Representative shall be entitled to receive all written materials and other information given to the directors of the Company in connection with all meetings of the Board of Directors or otherwise at the same time and in the same manner such materials and information are given to the directors. Prior to the Company's obligations to provide notices and information hereunder, each Representative shall execute and deliver to the Company a standard nondisclosure agreement restricting the use or disclosure of any confidential information received by such Representative pursuant to this Section 3. Each Representative shall be entitled to consult with and advise the Board of Directors on business issues with respect to the Company and its Subsidiaries, including management's proposed annual operating plans for the Company and its Subsidiaries. Notwithstanding the foregoing, the Company shall have the right to exclude any Representative from attending any portion of a meeting and shall have the right to withhold any written materials if the Board of Directors determines that such exclusion or withholding is necessary due to a potential or actual conflict of interest or determines that such exclusion or withholding is necessary to protect the attorney-client privilege between the Company and such counsel. The Company shall take all reasonably necessary steps to implement the provisions of this Section 3.

-5-

Section 4. Additional Parties and Definitions. If any of the Stockholders transfer any of its shares of the Company's capital stock, such party shall cause the execution by such persons or entities and the Company of a counterpart of this Agreement and an amendment adding their names as signatories hereto as a condition of any acquisition of such shares by such person or entity. This Agreement shall thereafter be amended to include such additional persons or entities without the necessity of procuring an amendment to this Agreement by the other parties hereto. The Secretary of the Company shall promptly notify the Stockholders of any purported transfer or disposition of shares by a stockholder under this Agreement.

Section 5. Severability; Governing Law. If any provisions of this Agreement shall be determined to be illegal or unenforceable by any court of law, the remaining provisions shall be severable and enforceable to the maximum extent possible in accordance with their terms. This Agreement shall be governed by, and construed in accordance with, the laws of the Commonwealth of Massachusetts without giving effect to the principles of conflicts of law thereof.

Section 6. Injunctive Relief. It is acknowledged that it will be impossible to measure the damages that would be suffered by any party if another party fails to comply with the provisions of this Agreement and that in the event of any such failure, the non-defaulting party will not have an adequate remedy at law. The non-defaulting party shall, therefore, be entitled to obtain specific performance of any defaulting party's obligations hereunder and to obtain immediate injunctive relief. The defaulting party shall not argue, as a defense to any proceeding for such specific performance or injunctive relief, that the non-defaulting party has an adequate remedy at law.

Section 7. Binding Effect. This Agreement shall be binding upon and inure to the benefit of the parties hereto and their permitted successors and assigns, legal representatives and heirs. This Agreement supercedes all prior agreements (including without limitation the Prior Agreement, which is hereby rendered null and void and of no further force and effect), whether written or oral, by and between the Company and the Stockholders with respect to the subject matter set forth herein.

Section 8. Modification or Amendment. Neither this Agreement nor any provision hereof can be modified, amended, changed, discharged or terminated except by an instrument in writing, signed by (a) the Company (b) Cerberus Partners, L.P. if it is then a Stockholder and (c) that number of Stockholders representing at least 50% of the outstanding shares of the series of stock to be affected by such amendment or change.

Section 9. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one and the same instrument.

-6-

Section 10. Notices. All notices to be given or otherwise made to any part to this Agreement shall be deemed to be sufficient if contained in a written instrument, delivered by hand in person, by express overnight courier service, or by electronic facsimile transmission (with a confirming copy sent by U.S. mail, first class, postage prepaid mail), or by first class mail, postage prepaid, addressed, if to a Stockholder, at the last address of record in the Company's stock record books and, if to the Company, at its principal offices. All notices shall be considered to be delivered three (3) days after dispatch in the event of first class or registered mail, and on the next succeeding business day in the event of facsimile transmission (with confirmation of receipt) or overnight courier service.

Section 11. Duration of Agreement. The rights and obligations of the Company and the Series C Holders under this Agreement shall terminate, immediately prior to the consummation of and expressly conditioned upon a Qualified Public Offering. The rights and obligations of the Company and the Stockholders (other than the Series C Holders) under this Agreement shall terminate, on the earlier to occur of the following: (a) immediately prior to the consummation of and expressly conditioned upon a Qualified Public Offering,
(b) immediately prior to and expressly conditioned upon the consummation of the sale of all, or substantially all, of the Company's assets or capital stock either through a direct sale, merger, reorganization, consolidation or other form of business combination or acquisition in which voting control of the equity securities of the Company is transferred to a third party, or (c) ten years from the date hereof.

-7-

IN WITNESS WHEREOF, the parties hereto have caused this Amended and Restated Voting Agreement to be executed as of the date first above written.

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By: /s/ John W Babich
    ----------------------
    John Babich, President

COMMON STOCKHOLDERS:

/s/ David Barlow
----------------
David Barlow

/s/ Phillip S. Magiera      04/24/05
------------------------------------
Phillip S. Magiera

MEYTHALER INVESTORS:

By: /s/ L. Charles Meythaler
    ------------------------
Name: L. Charles Meythaler
Title: Manager

/s/ Ann Barlow
--------------
Ann Barlow

/s/ John W Babich
-----------------
John Babich

RAPHAEL, LLC

By: _________________
Name: Enrico Petrillo
Title:

-8-

A PURCHASERS:

/s/ David Barlow
----------------
David Barlow

/s/ James Poitras
-----------------
James Poitras

/s/ Patricia T. Poitras
-----------------------
Patricia T. Poitras

BOTH AS INDIVIDUALS AND
AS TRUSTEES OF THEIR
RESPECTIVE REVOCABLE TRUST


James and Katherine Tambone

/s/ Okjin Kim
-------------
Okjin Kim

/s/ Ann Barlow
--------------
Ann Barlow

MEYTHALER INVESTORS:

By: /s/ L. Charles Meythaler
    ------------------------
Name: L. Charles Meythaler
Title: Manager

B PURCHASERS:

/s/ Frederick Frank
-------------------
Frederick Frank

CERBERUS PARTNERS, L.P.:

By: Cerberus Associates, L.L.C., its
general partner

By: /s/ Seth Plattus
    -------------------------------
    Seth Plattus, Managing Director

-9-

By: /s/ Gerald Izzi MD
    -------------------------------
Name: Other Series B Shareholder
Title: GERALD IZZI

C PURCHASERS:

CERBERUS PARTNERS, L.P.:

By: Cerberus Associates, L.L.C., its
general partner

By: /s/ Seth Plattus
    -------------------------------
    Seth Plattus, Managing Director

SIEMENS VENTURE CAPITAL GMBH

By: _______________________________
Name:
Title:

-10-

C PURCHASERS:

CERBERUS PARTNERS, L.P.:

By: Cerberus Associates, L.L.C., its general partner

By: /s/ Seth Plattus
    -------------------------------
    Seth Plattus, Managing Director

SIEMENS VENTURE CAPITAL GMBH

By: _______________________________
Name:
Title:

M/M JAMES W. POITRAS
3100 SPRINGHEAD COURT
NARCOOSSEE FL 34771-8554

/s/ Patricia T. Poitras                                 /s/ James W. Poitras
-----------------------                                 --------------------
PATRICIA T. POITRAS                                     JAMES W. POITRAS

BOTH AS INDIVIDUALS AND AS TRUSTEES OF THEIR RESPECTIVE REVOCABLE TRUSTS

-11-

C PURCHASER:

Andrew R Midler Family Trust

By: /s/ Andrew R. Midler
    ----------------------
    Name: Andrew R. Midler
    Title: Trustee

-12-

C PURCHASER:

John D. Singer, Esq.

By: /s/ John D. Singer, Esq.
    ---------------------------
    Name: John D. Singer, Esq.
    Title:

-13-

C PURCHASER:

MICHAEL C. DEUTSCH

By: /s/ Michael C. Deutsch
    --------------------------
    Name: Michael C. Deutsch
    Title:

-14-

C PURCHASER:

James W. Poitras

By: /s/ James W. Poitras
    -----------------------------------------------
    Name: JAMES W. POITRAS REVOCABLE TRUST V/A 29 N
    Title: JAMES W. POITRAS, TRUSTEE

By: /s/ Patricia T. Poitras
    -----------------------------------------------
    PATRICIA T. POITRAS REVOCABLE TRUST V/A 29 N
       PATRICIA T. POITRAS, TRUSTEE

-15-

C PURCHASER:

By: /s/ Carol Frank
    --------------------
    Name:
    Title:

-16-

C PURCHASER:

Benjamin M. Frank Trust

By: /s/ Benjamin M. Frank
    ---------------------------
    Name:Benjamin M. Frank
    Title: Trustee

-17-

C PURCHASER:

John P. Davy

By:_______________________________ Name:

Title:

-18-

C PURCHASER:

RAJPAL SANDHU

/s/ Mary C. Henry
--------------------------------
Name: Rajpal Sandhu & Mary Henry
Title:

-19-

C PURCHASER:

JAMES T. LENEHAN

By: /s/ James T. Lenehan
    ----------------------
    Name: JAMES T. LENEHAN
    Title:

-20-

C PURCHASER:

LIONEL N. STERLING REVOCABLE TRUST

By: /s/ Lionel N. Sterling
    ---------------------------------------
    Name: LIONEL N. STERLING
    Title: TRUSTEE

-21-

C PURCHASER:

America Durham, L.P.

By: /s/ T. K. Duggan
    -------------------------
    Name: T. K. DUGGAN
    Title: MANAGING PRINCIPAL

-22-

C PURCHASER:

International Durham, Ltd.

By: /s/ T. H. Dujga
    ---------------------------------------
    Name: T. H. Dujga
    Title: [ILLEGIBLE]

-23-

C PURCHASER:

Institutional Benchmarks Master Fund-Canopus

By: /s/ Garry Crowder
    ------------------------------------------
    Name: GARRY CROWDER
    Title: Director

-24-

C PURCHASER:

RICHARD SIMON

By: /s/ Richard Simon
    -------------------
    Name: RICHARD SIMON
    Title:

-25-

C PURCHASER:


By: /s/ William R. Ebsworth
    ---------------------------------------
    Name: WILLIAM R. EBSWORTH
    Title:

-26-

C PURCHASER:

Alan N. Berro

By: /s/ Alan N. Berro
    ------------------
    Name:
    Title:

-27-

C PURCHASER:

Renee M. Noto

By: /s/ Renee M. Noto
    -----------------
    Name:
    Title:

-28-

C PURCHASER:

THE RAPTOR GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

-29-

C PURCHASER:

THE TUDOR BVI GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

-30-

C PURCHASER:

TUDOR PROPRIETARY TRADING, L.L.C.

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

-31-

C PURCHASER:

William C. Smith

Dana Davis Smith

By: /s/ William C. Smith  /s/ Dana Davis Smith
    --------------------------------------------
    JOINT TENANTS WITH RIGHT OF SURVIVORSHIP

-32-

C PURCHASER:

THE ALTAR ROCK FUND L.P.

By: Tudor Investment Corporation, General Partner

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

-33-

C PURCHASER:

Julie R. Frank, Trustee

By: /s/ Julie R. Frank, Revocable Trust
    --------------------------------------
    Dated August 13, 2001
    Name:
    Title:

-34-

C PURCHASER:


By: /s/ John C. Otsuki
    ---------------------------------------
    Name: JOHN C. OTSUKI
    Title:

-35-

C PURCHASER:

MedCap Partners L.P.

By: /s/ [ILLEGIBLE]
    ---------------------------------------
    Name: [ILLEGIBLE]
    Title: Managing Member

-36-

C PURCHASER:

MedCap Master Fund, L.P.

By: /s/ [ILLEGIBLE]
    ---------------------------------------
    Name: [ILLEGIBLE]
    Title: Managing Member of the GP

-37-

C PURCHASER:

Kenneth Rubin

By: /s/ Kenneth Rubin
    ---------------------------------------
    Name: Individually
    Title:

-38-

C PURCHASER:


By: /s/ William P. Rice
    ---------------------------------------
    Name: WILLIAM P. RICE
    Title:

-39-

C PURCHASER:

JAMES J. GOLL

By: /s/ James J. Goll
    ---------------------------------------
    Name: JAMES J. GOLL
    Title:

-40-

C PURCHASER:

James M. Hirshberg

By: /s/ James M. Hirshberg
    ---------------------------------------
    Name:
    Title:

-41-

C PURCHASER:

Dana Doe

By: /s/ Dana Doe
    ---------------------------------------
    Name:
    Title:

-42-

C PURCHASER:


By: /s/ Daniel Frank
    ---------------------------------------
    Name: Daniel Frank
    Title:

-43-

Exhibit 10.4

INVESTOR RIGHTS AGREEMENT

THIS INVESTOR RIGHTS AGREEMENT (this "Agreement") is made as of this 29th day of March, 2005, by and among Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation (the "Company"), and the investors identified on the signature pages hereto (each an "Investor" and collectively the "Investors").

RECITALS:

A. Pursuant to the terms of a certain Stock Purchase Agreement, of even date herewith, by and among the Company and the Investors (as amended, restated, supplemented or otherwise modified from time to time, the "Purchase Agreement"), the Company is issuing to the Investors an aggregate of 148,515 shares of a newly created series of the Company's preferred stock, par value $0.01 per share, designated as "Series C Convertible Preferred Stock" (the "Series C Preferred Stock"); and

B. The parties hereto desire to enter into this Agreement to, among other things, set forth the rights of the Investors with respect to: (i) the registration of shares of Common Stock issuable to the Investors upon conversion of the Series C Preferred Stock; (ii) the receipt of certain information from the Company; and (iii) the participation in future issuances and transfers of securities of the Company.

NOW, THEREFORE, in consideration of the foregoing and the respective covenants hereinafter set forth, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and each Investor, severally and not jointly, hereby agree as follows:

ARTICLE I DEFINITIONS.

1.1 General Definitions. All capitalized terms not otherwise defined in this Agreement shall have the meanings ascribed thereto in the Purchase Agreement. As used in this Agreement, unless the context otherwise requires, the following terms shall have the respective meanings set forth below:

"Agreement" shall have the meaning ascribed to it in the preamble to this Agreement.

"Board" means the Board of Directors of the Company.

"Cerberus" means Cerberus Capital Management, L.P., for itself and/or one or more of its Affiliates and/or accounts managed by Cerberus Capital Management, L.P., including, without limitation, Cerberus Partners, L.P.

"Commission" means the U.S. Securities and Exchange Commission or any other successor federal agency then administering the Securities Act of 1933, as amended, and other federal securities laws.

"Common Stock" means the common stock, par value $.01 per share, of the Company, and any other securities into which or for which such Common Stock may be converted or exchanged pursuant to a plan of recapitalization, reorganization, merger, consolidation, sale of assets or other similar transaction.

"Company" shall have the meaning ascribed to it in the preamble to this Agreement.


"Exchange Act" means the Securities Exchange Act of 1934, as amended, or any successor federal statute, and the rules and regulations of the Commission issued under such Act, as they each may, from time to time, be in effect.

"Investor(s)" shall have the meaning ascribed to it in the preamble to this Agreement.

"Preferred Stock" means the Series A Preferred Stock, the Series B Preferred Stock and the Series C Preferred Stock.

"Purchase Agreement" shall have the meaning ascribed to it in the recitals to this Agreement.

"Qualified Public Offering" means a firm commitment underwritten public offering of shares of the Common Stock in which the aggregate gross proceeds thereof to the Company shall be no less than $30,000,000 and having a per share offering price of at least $5.00.

"Requisite Investors" means Cerberus and Investors holding at least a majority of the Common Stock issuable upon conversion of the then issued and outstanding shares of Series C Preferred Stock.

"Series C Preferred Stock" shall have the meaning ascribed to it in the recitals to this Agreement.

"Shares" shall have the meaning ascribed to it in Section 3.1.

ARTICLE II INTENTIONALLY OMITTED.

ARTICLE III TRANSFER OBLIGATIONS.

3.1 Transfers Prohibited. David Barlow, currently the Company's CEO ("Barlow"), shall not sell, assign, transfer, exchange, give, devise, pledge, hypothecate, encumber or otherwise alienate or dispose of any shares of capital stock of the Company (the "Shares") owned by him, or any right or interest therein, whether voluntarily or involuntarily, by operation of law or otherwise, except in accordance with this Agreement. Notwithstanding the foregoing or
Section 3.2 below, Barlow may transfer any or all of the Shares (i) to his spouse or children or to a trust or partnership established for the benefit of him, his spouse, his ex-spouse or his children, (ii) by will, or (iii) to his Affiliates, provided that such Shares shall remain subject to this Agreement and such permitted transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. Except to the extent otherwise required by applicable law, any transfer of title of any interest in any of the Shares upon default, foreclosure, forfeit, or otherwise than by a voluntary decision on the part of Barlow, other than any transfer upon death (each, other than any transfer upon death, an "Involuntary Transfer"), shall be void unless Barlow complies with this Article III and enables the Investors to exercise in full their rights hereunder. Upon any Involuntary Transfer, the Investors shall have the right to purchase such Shares pursuant to this Article III and the Person to whom such Shares have been transferred (the "Involuntary Transferee") shall have the obligation to sell such Shares in accordance with this Article III. Upon the Involuntary Transfer of any Shares, Barlow shall promptly (but in no event later than ten (10) days after such Involuntary Transfer) furnish written notice to the Company and the Investors indicating that the Involuntary Transfer has occurred, specifying the name of the Involuntary Transferee, giving a description of the circumstances giving rise to, and stating the legal basis for, the Involuntary Transfer. The Investors shall have the right

-2-

to purchase, and the Involuntary Transferee shall have the obligation to sell, all (but not less than all) of the Shares acquired by the Involuntary Transferee for a purchase price per share equal to the fair market value per Share as determined in good faith by the Board and otherwise in accordance with the provisions of Section 3.2 below. The number of Shares which each Investor shall have the right to purchase shall be determined in the same manner as set forth below in Section 3.2 with respect to the exercise of the Investors' right of first refusal.

3.2. Rights of First Refusal on Voluntary Transfers.

(a) Subject to Section 3.2(c), if Barlow intends to sell, assign, transfer or otherwise voluntarily alienate or dispose of any Shares in one transaction or a series of related transactions (the "Selling Stockholder"), then the Selling Stockholder shall, prior to any such transfer, give written notice (the "Selling Stockholder's Notice") of such intention to the Company and the Investors. The Selling Stockholder's Notice shall include the name of the proposed transferee, the proposed purchase price per Share, the terms of payment of such purchase price and all other matters relating to such sale and shall be accompanied by a copy of a binding written agreement of the proposed transferee to purchase such Shares from the Selling Stockholder. If the Selling Stockholder is to receive non-cash consideration from the proposed transferee named in the Selling Stockholder's Notice, the Selling Stockholder's Notice shall specify the "Fair Market Value" (as defined in the Articles of Amendment) of such non-cash consideration as part of the purchase price to be paid for the Offered Shares by the Investors. The Selling Stockholder's Notice shall constitute a binding offer by the Selling Stockholder to sell to the Investors all or any part of such number of such Shares (the "Offered Shares") then owned by the Selling Stockholder as are proposed to be sold in the Selling Stockholder's Notice at the monetary price per Share designated in the Selling Stockholder's Notice, payable as provided in Section 3.2(b). Each Investor shall have the right to purchase all or any part of its Series C Proportionate Percentage (as defined below) of the Offered Shares at the monetary price per Share designated in the Selling Stockholder's Notice, payable as provided in Section 3.2(b). Not later than twenty (20) days after delivery of the Selling Stockholders' Notice, each holder of Series C Preferred Stock shall deliver to the Company, the other holders of Series C Preferred Stock and the Selling Stockholder a written notice (the "Investor Notice") stating whether such holder of Series C Preferred Stock has accepted the offer stated in the Selling Stockholder's Notice with respect to its Series C Proportionate Percentage of the Shares. If one or more of such holders of Series C Preferred Stock elects not to purchase all of the Shares which it is entitled to purchase pursuant to this Section 3.2, the other such holders of Series C Preferred Stock, by written notice to the Selling Stockholder within seven (7) days after the end of the twenty (20) day period set forth above, may elect to purchase all or a part of such unpurchased Shares without the consent of any non-purchasing holders of Series C Preferred Stock, pro rata between or among them or in such other manner as they may agree. The closing of any purchase of the Offered Shares by the holders of Series C Preferred Stock shall take place no later than fifteen (15) days after the end of the twenty (20) day period set forth above. As used herein, "Series C Proportionate Percentage" shall mean with respect to each holder of Series C Preferred Stock a fraction, the numerator of which is the number of shares of Series C Preferred Stock owned by such holder, and the denominator of which is the total number of shares of Series C Preferred Stock owned by all holders of Series C Preferred Stock. Each Investor shall be entitled to apportion shares purchased under this Section 3.2(a) among its partners and Affiliates.

(b) Closing. The place for the closing of any purchase and sale described in Section 3.2(a) shall be the principal office of the Company or at such other place as the parties shall agree in writing. At the closing, the Selling Stockholder shall accept payment on the terms (including price) offered by the proposed transferee named in the Selling Stockholder's Notice, provided, however, that the Investors shall not be required to meet any non-monetary terms of the proposed transfer, including, without limitation, delivery of consideration in the form of other securities in exchange for the Shares proposed to be sold, but shall be required to pay, in cash, the Fair Market Value of such non-monetary

-3-

consideration. At the closing, the Selling Stockholder shall deliver to the Investors in exchange for Shares purchased and sold at the closing, certificates for the number of Shares stated in the Selling Stockholder's Notice, accompanied by duly executed instruments of transfer.

(c) Transfers to Third Parties. If the Investors fail to accept the offer stated in the Selling Stockholder's Notice with respect to all of the Offered Shares, they shall not have the right to purchase any Offered Shares, and the Selling Stockholder shall be free, subject to compliance with Section 3.3, to sell all, but not less than all, of the Offered Shares to the designated transferee at a price and on terms no less favorable to the Selling Stockholder than described in the Selling Stockholder's Notice, provided, however, that such sale is consummated within ninety (90) days after the giving of the Selling Stockholder's Notice pursuant to Section 3.2(a). As a condition precedent to the effectiveness of a transfer pursuant to this Section 3.2(c), the proposed transferee(s) shall agree in writing prior to such transfer to become a party to this Agreement and shall thereafter be permitted to transfer Shares only in accordance with this Agreement; provided, however, that if such proposed transferee(s) is a bona fide third party, the transfer of Shares by such transferee shall not thereafter be subject to this Section 3.2.

3.3 Participation in Sales.

(a) Co-Sale Right. To the extent that the Investors do not exercise their respective rights of refusal as to all of the Offered Shares pursuant to
Section 3.2, then each Investor shall have the right to participate in such sale of securities, at the same price per Share and on the same terms and conditions as stated in the Selling Stockholder Notice (including any non-cash consideration), up to the number of Shares equal to the aggregate number of Offered Shares multiplied by a fraction, the numerator of which is the aggregate number of Shares held by such Investor (calculated on an as converted basis) and the denominator of which is the aggregate number of Shares held by the Selling Stockholder and all participating Investors (calculated on an as converted basis). To the extent one or more of the Investors exercise such right of participation in accordance with the terms and conditions of this Section 3.3, the number of Shares that the Selling Stockholder may sell in the transfer shall be correspondingly reduced.

(b) Notices of Offer and Intent to Participate. If an Investor wishes to participate in any sale pursuant to Section 3.3(a), it shall notify the Selling Stockholder in writing of such intention and the number of Shares it wishes to sell pursuant to this Section 3.3 not later than the end of the 20-day period described in Section 3.2(a) above. If the Selling Stockholder does not receive such notice from an Investor within such 20-day period, the Selling Stockholder shall be free to consummate the proposed transaction without any obligation to include such Investor's Shares in such transaction.

(c) Closing. Each participating Investor shall effect its participation in a sale contemplated by Section 3.3(a) by promptly delivering to the Selling Stockholder for transfer to the prospective purchaser one or more certificates, properly endorsed for transfer, which represent the type and number of Shares which such Investor elects to sell, or that number of shares of Series C Preferred Stock which are at such time convertible into the number of shares of Common Stock which such Investor elects to sell. The stock certificate or certificates that the Investor delivers to the Selling Stockholder pursuant to this Section 3.3(c) shall be transferred to the prospective purchaser in consummation of the sale of the securities pursuant to the terms and conditions specified in the Selling Stockholder Notice, and the Selling Stockholder shall concurrently therewith remit to such participating Investor that portion of the sale proceeds to which such participating Investor is entitled by reason of its participation in such sale. To the extent that any prospective purchaser or purchasers prohibits such assignment or otherwise refuses to purchase shares or other securities from an Investor exercising its rights of co-sale hereunder, the Selling Stockholder shall not sell to such prospective purchaser or purchasers any securities unless and until, simultaneously with such sale, the Selling Stockholder shall

-4-

purchase such Shares or other securities from such participating Investor for the same consideration and on the same terms and conditions as the proposed transfer described in the Selling Stockholder Notice.

3.4 Legend; Termination.

(a) Each certificate representing the shares of capital stock now or hereafter held of record or beneficially owned by Barlow shall bear a legend in substantially the following form, until such time as the shares of capital stock represented thereby are no longer subject to the provisions hereof:

THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO THE TERMS AND CONDITIONS OF AN INVESTOR RIGHTS AGREEMENT AMONG THE COMPANY AND CERTAIN OF ITS STOCKHOLDERS DATED AS OF MARCH ___, 2005, AS THE SAME MAY BE AMENDED OR AMENDED AND RESTATED FROM TIME TO TIME, WHICH, AMONG OTHER THINGS, RESTRICTS THE TRANSFER OF SUCH SECURITIES. A COPY OF SUCH AGREEMENT IS AVAILABLE FOR INSPECTION AT THE OFFICES OF THE COMPANY OR MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST TO THE SECRETARY OF THE COMPANY.

Upon execution of this Agreement, certificates for any shares of capital stock of the Company now or hereafter held of record or beneficially owned by Barlow shall be surrendered to the Company for endorsement with the above legend and then returned to Barlow, and hereafter the Company shall cause the above legend to be placed on all certificates issued by it to or for the benefit of Barlow which represent any additional shares of capital stock of the Company.

(b) The respective rights and obligations of the parties under this Article III shall terminate upon the earlier to occur of (i) the consummation of a Qualified Public Offering and (ii) the consummation of a Liquidation Event. At any time after termination of the rights and obligations under this Article III, the Company shall, upon Barlow's request, promptly re-issue certificate(s) without the legend required by Section 3.4(a) representing the securities held of record beneficially owned by Barlow evidenced by such certificate(s) as are surrendered to the Company by Barlow for such re-issuance.

ARTICLE IV FINANCIAL STATEMENTS; INFORMATION AND INSPECTION RIGHTS.

4.1. Delivery of Financial Statements. The Company shall deliver to each holder of shares of Series C Preferred Stock, as soon as available after the end of each fiscal year of the Company, the audited financial statements of the Company for such fiscal year then ended, together with the written opinion of the auditor rendered in connection therewith. With respect to such financial statements, if for any fiscal year, the Company shall have any Subsidiary whose accounts are consolidated with those of the Company, then in respect of such period, the financial statements delivered pursuant to the foregoing section shall be the consolidated and consolidating financial statements of the Company and all such consolidated subsidiaries.

4.2. Information Rights. The Company shall furnish to each holder of at least 9,901 shares of Series C Preferred Stock within five (5) business days after an executive officer of the Company or its Subsidiaries, as the case may be, has knowledge of the occurrence of a default hereunder, or under any material agreement of the Company or its Subsidiaries, including without limitation any loan or financing agreement, the commencement of any lawsuit, action, administrative or arbitration or other proceeding against or investigation with respect to the Company or the occurrence of any event, dispute or other development which is reasonably likely (with or without the passage of time) to have a Material Adverse

-5-

Effect, or any effect, condition, event, or circumstance that has resulted in a Material Adverse Effect, a statement from the President of the Company describing such occurrence and management's anticipated response. The Company shall furnish to each such holder such other financial and other reports or information of the Company and its Subsidiaries as any of such holders may reasonably request with respect to the foregoing or otherwise with respect to the operations of the Company.

4.3. Inspection Rights. The Company shall permit each holder of at least 9,901 shares of Series C Preferred Stock, at the Company's expense, to visit and inspect the Company's properties, to examine its books of account and records and to discuss the Company's affairs, finances and accounts with its officers for purposes of allowing such Investor to monitor its investment in the Company, all at such reasonable times and upon reasonable notice as may be reasonably requested by such Investor.

4.4. Limitations. Notwithstanding anything contained herein to the contrary, the financial reporting requirements and information and inspection rights contained in this Article IV (i) shall apply only for so long as the Company is not filing periodic reports with the Commission pursuant to Section 13 or Section 15 of the Exchange Act and (ii) shall be subject to the execution of confidentiality and non-compete agreements by the Persons requesting such information, in form and substance reasonably satisfactory to the Company.

ARTICLE V MISCELLANEOUS.

5.1. Successors and Assigns. This Agreement may not be assigned by a party hereto without the prior written consent of the Company or Cerberus, as applicable; provided, however, that an Investor may assign its rights and delegate its duties hereunder in whole or in part, without the prior written consent of the Company, to an Affiliate and to any Person to whom such Investor transfers any shares of the Series C Preferred Stock, provided, that, no such assignment shall be effective or confer any right on any such assignee unless, prior to such assignment, the assignee agrees in writing that such assignee will be bound by all provisions binding on such Investor. The provisions of this Agreement shall inure to the benefit of and be binding upon the respective permitted successors and assigns of the parties. Except for any other provisions of this Agreement expressly to the contrary, nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

5.2. Counterparts; Faxes. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement may also be executed via facsimile, which shall be deemed an original.

5.3. Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

5.4. Notices. Unless otherwise provided, any notice required or permitted under this Agreement shall be given in writing and shall be deemed effectively given as hereinafter described: (i) if given by personal delivery, then such notice shall be deemed given upon such delivery; (ii) if given by telex or telecopier, then such notice shall be deemed given upon receipt of confirmation of complete transmittal with a confirming copy by first class mail; (iii) if given by mail, then such notice shall be deemed given upon the earlier of (A) receipt of such notice by the recipient or (B) three (3) days after such notice is deposited in first class mail, postage prepaid; and (iv) if given by an internationally recognized overnight air courier, then such notice shall be deemed given one (1) Business Day after delivery to such carrier. All notices shall be addressed to the party to be notified at the address as follows, or at such other address as such party may designate by ten (10) days' advance written notice to the other party:

-6-

If to the Company:

Molecular Insight Pharmaceuticals, Inc.
160 Second Street
Cambridge, Massachusetts 02142
Attn: David Barlow
Fax: (617)492-5664

With a copy to:

Foley & Lardner LLP
111 Huntington Avenue
26th Floor
Boston, Massachusetts 02199
Attn: Gabor Garai,Esq.
Fax: (617)342-4001

If to any of the Investors:

to the addresses set forth on the signature
pages attached hereto.

or to such other address as any party hereto shall notify the other parties hereto (as provided above) from time to time.

5.5. Expenses. The Company agrees to pay all reasonable out-of-pocket expenses relating to the establishment, due diligence and monitoring of and the administration and exercise of any rights in, and enforcement of, the transactions contemplated by this Agreement and the other Transactions Documents, which arise after the date hereof, and such expenses may include, but not be limited to legal, travel, accounting and Board attendance expenses. Such expenses shall be paid by the Company to the Investors as incurred and upon the request of each such Investor. In the event that legal proceedings are commenced by any party to this Agreement against another party to this Agreement in connection with this Agreement or the other Transaction Documents, the party or parties which do not prevail in such proceedings shall severally, but not jointly, pay their pro rata share of the reasonable attorneys' fees and other reasonable out-of-pocket costs and expenses incurred by the prevailing party in such proceedings.

5.6 Amendments and Waivers. This Agreement shall not be amended without the prior written consent of the Requisite Investors. The Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company shall have obtained the written consent to such amendment, action or omission to act, of the Requisite Investors.

5.7. Publicity. No public release or announcement concerning the transactions contemplated by this Agreement or any other Transaction Document shall be issued by the Company or the Investors without the prior consent of the Company (in the case of a release or announcement by any of the Investors) or Cerberus (in the case of a release or announcement by the Company) (which consents shall not be unreasonably withheld), except as such release or announcement may be required by law, in which case the Company or the Investors, as the case may be, shall allow the Investors or the Company, as applicable, to the extent reasonably practicable in the circumstances, reasonable time to comment on such release or announcement in advance of such issuance.

5.8. Severability. Any provision of this Agreement that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or

-7-

unenforceability without invalidating the remaining provisions hereof but shall be interpreted as if it were written so as to be enforceable to the maximum extent permitted by applicable law, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. To the extent permitted by applicable law, the parties hereby waive any provision of law which renders any provision hereof prohibited or unenforceable in any respect.

5.9. Entire Agreement. This Agreement, including the Exhibits and Schedules, and the other Transaction Documents constitute the entire agreement among the parties hereof with respect to the subject matter hereof and thereof and supersede all prior agreements and understandings, both oral and written, between the parties with respect to the subject matter hereof and thereof.

5.10. Further Assurances. The parties shall execute and deliver all such further instruments and documents and take all such other actions as may reasonably be required to carry out the transactions contemplated hereby and to evidence the fulfillment of the agreements herein contained.

5.11. Governing Law; Consent to Jurisdiction. This Agreement shall be governed by, and construed in accordance with, the internal laws of the State of New York without regard to the choice of law principles thereof. Each of the parties hereto irrevocably submits to the jurisdiction of the courts of the State of New York located in New York County and the United States District Court for the Southern District of New York for the purpose of any suit, action, proceeding or judgment relating to or arising out of this Agreement and the transactions contemplated hereby. Service of process in connection with any such suit, action or proceeding may be served on each party hereto anywhere in the world by the same methods as are specified for the giving of notices under this Agreement. Each of the parties hereto irrevocably consents to the jurisdiction of any such court in any such suit, action or proceeding and to the laying of venue in such court. Each party hereto irrevocably waives any objection to the laying of venue of any such suit, action or proceeding brought in such courts and irrevocably waives any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum.
THE COMPANY AND EACH OF THE INVESTORS HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING RELATING TO OR ARISING OUT OF THIS AGREEMENT OR ANY OTHER TRANSACTION DOCUMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY.

5.12 Independent Nature of Investors' Obligations and Rights. Except as expressly provided herein and therein, the obligations of each Investor under this Agreement and each other Transaction Document are several and not joint with the obligations of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock), and no Investor shall be responsible in any way for the performance of the obligations of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) under this Agreement or any other Transaction Document. The decision of each Investor to purchase Series C Preferred Stock pursuant to this Agreement and the other Transaction Documents has been made by such Investor independently of any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock). Nothing contained herein or in any other Transaction Document, and no action taken by any Investor (including, without limitation, any of the Co-lead Investors) pursuant hereto or thereto, shall be deemed to constitute the Investors (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Investors are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by this Agreement or the other Transaction Documents. Each Investor acknowledges that no other Investor (including, without limitation, any of the Co-lead Investors, and regardless of the Closing at which such Investor purchased its Series C Preferred Stock) has acted as agent for such Investor in connection with making its investment hereunder and that no Investor (including, without limitation, any of the Co-lead Investors, and regardless of the Closing at which such

-8-

Investor purchased its Series C Preferred Stock) will be acting as agent of such Investor in connection with monitoring its investment in the Shares or enforcing its rights under this Agreement or the other Transaction Documents. Each Investor shall be entitled to independently protect and enforce its rights, including, without limitation, the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) to be joined as an additional party in any proceeding for such purpose. The Company acknowledges that each of the Investors has been provided with the same Transaction Documents for the purpose of closing a transaction with multiple Investors at multiple Closings and not because it was required or requested to do so by any Investor. Notwithstanding anything contained in this Agreement or any other Transaction Document to the contrary, neither of the Co-Lead Investors shall have any duty, fiduciary or otherwise, to any other Investor (regardless of the Closing at which such Investor purchased its Series C Preferred Stock) by virtue of such Investor serving as a Co-Lead Investor or otherwise.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

-9-

[COMPANY SIGNATURE PAGE]

IN WITNESS WHEREOF, the parties hereto have executed this Agreement or caused this Agreement to be executed by their duly authorized representatives, as of the date first written above.

THE COMPANY:

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By: /s/ David S. Barlow
    -------------------
Name: David S. Barlow
Title: Chairman & CEO

/s/ David S. Barlow
-----------------------
DAVID BARLOW, SOLELY FOR PURPOSES OF
ARTICLES IV AND VI OF THE AGREEMENT

-10-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

CERBERUS PARTNERS, L.P.

By: Cerberus Associates, LLC,
its General Partner

By: /s/ Seth Plattus
    -----------------
    Seth Plattus
    Managing Director

Address: 299 Park Avenue 22nd Floor New York, NY 10171

With a copy to (which shall not be deemed notice for purposes of the Agreement):

Lowenstein Sandler PC 65 Livingston Avenue Roseland, NJ 07068 Attn: Robert G. Minion, Esq.

Fax: (973) 597-2400

-11-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Andrew R Midler Family Trust 5/99

By: /s/ Andrew R Midler
    ---------------------
    Name: Andrew R Midler
    Title: Trustee

Address: 283 Summit Ave
Mill Valley Ca 94941

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-12-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

John D. Singer, Esq.

By: /s/ John D. Singer, Esq.
    -------------------------
    Name: John D. Singer, Esq.
    Title:

Address: 200 East 69th Street

Apartment #18-E

New York, NY 10021

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-13-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

MICHAEL C. DEUTSCH

By: /s/ Michael C. Deutsch
    ----------------------
    Name: Michael C. Deutsch
    Title:

Address: 331 Madison Ave, 3rd Floor New York, NY 10017

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-14-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


/s/ Patricia T. Poitras              By: /s/ James W Poitras
-----------------------                  -------------------
Patricia T. Poitras Revocable Trust      Name: James W Poitras Revocable Trust
V/A 29 Nov 04                                  V/A 29 Nov.
                                         Title: James W Poitras Trustee
Patricia T. Poitras Trustee


                                     Address: M/M JAMES W. POITRAS
                                              --------------------------
                                              3100 SPRINGHEAD COURT
                                              --------------------------
                                              NARCOOSSEE FL 34771-8554
                                              --------------------------

                                     With a copy to (which shall not be
                                     deemed notice for purposes of the
                                     Agreement):

                                     JW POITRAS@ALUM.MIT.EDU
                                     -----------------------------------

                                     -----------------------------------

                                     -----------------------------------

-15-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Carol Frank

By:
Name:


Title:

Address: 11529 Conway Rd

St. Louis MO 63131

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-16-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Benjamin M. Frank Trust

By: /s/ Benjamin M. Frank
    ---------------------
    Name: Benjamin M. Frank
    Title: Trustee

Address: 106 Breckenwood Way Sacramento CA 95864

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-17-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

/s/ John P. Davy
----------------------------------

By: John P. Davy
   -------------------------
   Name:
   Title:

Address: 16413 NE 135th St
Redmond, WA 98052

With a copy to (which shall not be deemed notice for purposes of the Agreement):

KRIS DAVY
16413 NE 135 St

Redmond WA 98052

-18-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Rajpal Sandhu

By: /s/ Mary C Henry
    ----------------
    Name: Rajpal Sandhu & Mary Henry
    Title:

Address: 420 FAMILY FARM ROAD WOODSIDE, CA-94062

650-529-0606

Raj@RajSandhu.com

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-19-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ James T. Lenehan
    --------------------
    Name: James T. Lenehan
    Title:

Address: 1586 HAMPTON RD

RYDAL, PA

19046

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-20-

[INVESTOR SIGNATURE PAGE)

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Lionel N. Sterling Revocable Trust

By: /s/ Lionel N. Sterling
    ----------------------
    Name: Lionel N. Sterling
    Title: Trustee

Address: 631 WEST RD.

NEW CANAAN CT.

06840

With a copy to (which shall not be deemed notice for purposes of the Agreement):

LIONEL N. STERLING
c/o EQUITY RESOURCES INC. 4th FL.
5 GREENWICH OFFICE PARK
GREENWICH CT. 06831

-21-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

American Durham, L.P.

By: /s/ T.K. Duggan
    --------------------
    Name: T.K. DUGGAN
    Title: Managing Principal

Address: 680 5th Ave.

22nd Floor

N.Y, N.Y 10019

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-22-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

International Durham, Ltd.

By: /s/ T.K. Duggan
    --------------------
    Name:  T.K. Duggan
    Title: Managing Principal

Address: 680 5th Ave.

22nd Floor

N.Y, N.Y 10019

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-23-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

International Benchmarks Master Fund

By: /s/ Garry Crowder
    ----------------------
    Name: Garry Crowder
    Title: Director

Address:


With a copy to (which shall not be deemed notice for purposes of the Agreement):




-24-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Richard Simon

By: /s/ Richard Simon
    -----------------
    Name:
    Title:

Address: 219 LAKE AVENUE

NEWTON, MA 02461

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-25-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ William R. Ebsworth
    -----------------------
    Name: William R. Ebsworth
    Title:

Address: 17 AUDUBON RD

WESTON MA 02493

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-26-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Alan N. Berro

By: /s/ Alan N. Berro
    -----------------
    Name:
    Title:

Address: P.O. BOX 15155

BEVERLY HILLS CA

90209

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-27-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Renee M. Noto

By: /s/ Renee M. Noto
    -----------------
    Name:
    Title:

Address: 275 Stanwich Road Greenwich, CT 06530

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-28-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

THE RAPTOR GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation,
Investment Advisor

By: /s/ William T. Flaherty
    -----------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-29-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

THE TUDOR BVI GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation,
Trading Advisor

By: /s/ William T. Flaherty
    -----------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-30-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

TUDOR PROPRIETARY TRADING, L.L.C.

By: /s/ William T. Flaherty
    -----------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-31-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

By: /s/ William C. Smith
    --------------------
    William C. Smith

    /s/ Dana Davis Smith
    --------------------
    Dana Davis Smith

JOINT TENANTS WITH RIGHT
OF SURVIVORSHIP

Address: 218 RIVER PARK DRIVE
GREAT FALLS, VA 22066

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-32-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

THE ALTAR ROCK FUND L.P.

By: Tudor Investment Corporation,
General Partner

By: /s/ William T. Flaherty
    -----------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-33-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Julie R. Frank, Trustee

By: /s/ Julie R. Frank Revocable Trust
    ----------------------------------
    Dated August 13, 2001
    Name:
    Title:

Address: 3 Roclare Lane St. Louis, MO 63131

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-34-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ John C. Otsuki
    ------------------
    Name: John C. Otsuki
    Title:

Address: 4718 MERIVALE RD.


CHEVY CHASE, MD 20815

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-35-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

MedCap Partners L.P.

By: /s/ [ILLEGIBLE]
    ---------------
    Name: [ILLEGIBLE]
    Title: Managing Member

Address: 500 Third Street, Suite 535 San Francisco, CA 94107

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-36-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

MedCap Master Fund, L.P.

By: /s/ [ILLEGIBLE]
    ---------------
    Name: [ILLEGIBLE]
    Title: Managing Member of the GP

Address: ATC Trustees (Cayman) Limited
[ILLEGIBLE]), 2nd Floor, Harbour Drive George Town, Grand Cayman Cayman Islands

With a copy to (which shall not be deemed notice for purposes of the Agreement):

500 Third Street # 535 San Francisco, CA 94107

-37-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

Keneth Rubin

By: /s/ Kenneth Rubin
    ----------------
    Name: Kenneth Rubin
    Title: Individually

Address: 68 Barkers Point Road Sands Point, NY 11050

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-38-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

WILLIAM P. RICE

By: /s/ William P. Rice
    -------------------
    Name: WILLIAM P. RICE
    Title:

Address: P.O. BOX 1599
DUXBURY, MA 02331

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-39-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:

James J. Goll

By: /s/ James J. Goll
    -----------------
    Name: James J. Goll
    Title:

Address: 32 Three Wells Lane Darien, CT 06820 (203) 656-0228
JJCG@SBCGLOBAL.NET

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-40-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ James M. Hirshberg
    ----------------------
    Name: James M. Hirshberg
    Title:

Address: 62 PRINCE ST
WEST NEWTON, MA 02465

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-41-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ Dana G. Doe
    ---------------
    Name: Dana G. Doe
    Title:

Address: [ILLEGIBLE]

Winchester, MA 01890

With a copy to (which shall not be deemed notice for purposes of the Agreement):




-42-

[INVESTOR SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF INVESTOR:


By: /s/ Daniel Frank
    ----------------
    Name: Daniel Frank
    Title:

Address: 19 WHALING ROAD
DARIEN CT 06820

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




-43-

Exhibit 10.5

REGISTRATION RIGHTS AGREEMENT

THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement") is made as of this 29th day of March, 2005, by and among:

Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation (the "Company"), the holders (the "Series A Holders") of the Series A Convertible Preferred Stock, par value $0.01 per share, of the Company (the "Series A Preferred Stock") set forth on Schedule A attached hereto;

The holders (the "Series B Holders") of the Series B Convertible Preferred Stock, par value $0.01 per share, of the Company (the "Series B Preferred Stock") set forth on Schedule B attached hereto;

The holders (the "Series C Holders" and together with the Series A Holders and the Series B Holders, the "Preferred Holders") of the Series C Convertible Preferred Stock, par value $0.01 per share, of the Company (the "Series C Preferred Stock") set forth on Schedule C attached hereto; and

The holders (the "Common Holders" and together with the Series A Holders, the Series B Holders and the Series C Holders, each, an "Investor" and collectively, the "Investors") of the common stock of the Company, par value $0.01 per share (the "Common Stock").

RECITALS:

A. Pursuant to the terms of a certain Stock Purchase Agreement, of even date herewith, by and among the Company, Cerberus Partners, L.P. and Medcap Partners, L.P., as the lead investors, and the other Series C Holders signatory thereto (as may be amended, restated, supplemented or otherwise modified from time to time, the "Purchase Agreement"), the Company is issuing to the Series C Holders an aggregate of up to 148,515 shares (the "Series C Preferred Shares") of the newly created Series C Preferred Stock; and

B. As a condition to the Initial Closing (and each Follow-on Closing, if any) under the Purchase Agreement, the parties hereto desire to enter into this Agreement to set forth, among other things, the rights of the Investors with respect to the registration of shares of Common Stock held by and issuable to the Preferred Holders upon conversion of the Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock (the "Preferred Stock");

NOW, THEREFORE, in consideration of the foregoing and the respective covenants hereinafter set forth, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and each Preferred Holder, severally and not jointly, hereby agree as follows:

ARTICLE I DEFINITIONS.

1.1 General Definitions. All capitalized terms used but not defined herein shall have the meanings ascribed thereto in the Purchase Agreement. As used in this Agreement, unless the context otherwise requires, the following terms shall have the respective meanings set forth below:

1

"Affiliate" means, with respect to any Person, any other Person which directly or indirectly Controls, is Controlled by, or is under common Control with, such Person. Notwithstanding the foregoing, none of the Company, its owners, officers, directors, employees, agents or advisors (or any of their family members) shall be deemed an "Affiliate" of a Preferred Holder, unless any such Person is otherwise (i.e., independent of the Company) an Affiliate of such Preferred Holder.

"Agreement" shall have the meaning ascribed to it in the preamble to this Agreement.

"Board" means the Board of Directors of the Company.

"Business Day" means a day, other than a Saturday or Sunday, on which banks in New York, New York are open for the general transaction of business.

"Cerberus" means Cerberus Capital Management, L.P., for itself and/or one or more of its Affiliates and/or accounts managed by Cerberus Capital Management, L.P., including, without limitation, Cerberus Partners, L.P.

"Control" means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities, by contract or otherwise.

"Co-Lead Investors" means Cerberus Partners, L.P. and MedCap Partners, L.P.

"Commission" means the U.S. Securities and Exchange Commission or any other successor federal agency then administering the Securities Act and other federal securities laws.

"Common Stock" means the common stock, par value $.01 per share, of the Company, and any other securities into which or for which such Common Stock may be converted or exchanged pursuant to a plan of recapitalization, reorganization, merger, consolidation, sale of assets or other similar transaction.

"Company" shall have the meaning ascribed to it in the preamble to this Agreement.

"Conversion Shares" means the shares of Common Stock issuable upon conversion of the Series C Preferred Stock.

"Exchange Act" means the Securities Exchange Act of 1934, as amended, or any successor federal statute, and the rules and regulations of the Commission issued under such Act, as they each may, from time to time, be in effect.

"Initial Public Offering" means the first underwritten public offering of the Common Stock by the Company pursuant to an effective Registration Statement.

"Initiating Stockholders" means the Investor(s) who cause a Demand Notice to be delivered pursuant to Section 2.1.

"Investor(s)" shall have the meaning ascribed to it in the preamble to this Agreement.

"Other Stockholders" shall have the meaning ascribed to it in
Section 2.1(d).

2

"Person" means an individual, corporation, partnership, limited liability company, trust, business trust, association, joint stock company, joint venture, sole proprietorship, unincorporated organization, governmental authority or any other form of entity not specifically listed herein..

"Preferred Holders" shall have the meaning ascribed to it in the recitals to this Agreement.

"Preferred Stock" shall have the meaning ascribed to it in the recitals to this Agreement.

"Prospectus" shall mean the prospectus included in any Registration Statement, as amended or supplemented by any prospectus supplement, with respect to the terms of the offering of any portion of the Registrable Securities covered by such Registration Statement and by all other amendments and supplements to the prospectus, including post-effective amendments and all material incorporated by reference in such prospectus.

"Purchase Agreement" shall have the meaning ascribed to it in the recitals to this Agreement.

"Register," "registered" and "registration" refer to a registration made by preparing and filing a Registration Statement or similar document in compliance with the Securities Act, and the declaration or ordering of effectiveness of such Registration Statement or document.

"Registrable Securities" means: (i) the Preferred Stock; (ii) any and all shares of Common Stock issued or issuable in respect of the Preferred Stock upon any stock split, reverse stock split, stock dividend, recapitalization, reorganization, merger, consolidation, sale of assets or similar event; (iii) the shares of Common Stock issuable as payment-in-kind dividends on the Preferred Stock in accordance with the terms thereof; and (iv) any other shares of Common Stock acquired by any of the Investors at any time. Notwithstanding the foregoing, the term "Registrable Securities" shall not include any shares which have been (i) sold to or through a broker or dealer or underwriter in a public distribution or a public securities transaction, (ii) sold in a transaction exempt from the registration and prospectus delivery requirements of the Securities Act under Section 4(1) thereof so that all transfer restrictions and restrictive legends with respect thereto are removed upon the consummation of such sale, (iii) registered under the Securities Act pursuant to an effective Registration Statement filed thereunder or (iv) publicly sold pursuant to Rule 144 under the Securities Act.

"Registration Statement" means a Registration Statement filed by the Company with the Commission for a public offering and sale of securities of the Company (other than a Registration Statement on Form S-8 or Form S-4, or their successors, or any other form for a similar limited purpose, or any Registration Statement covering only securities proposed to be issued in exchange for securities or assets of another corporation).

"Requisite Series AB Holders" means (i) the holders of at least a majority of the Common Stock then issued and outstanding but not registered, which were issued upon conversion of the Series A Preferred Stock and Series B Preferred Stock, or (ii) holders holding at least a majority of the Common Stock issuable upon conversion of the then issued and outstanding shares of Series A Preferred Stock and Series B Preferred Stock.

"Requisite Series C Holders" means Cerberus and (i) Series C Holders holding at least a majority of the Common Stock then issued and outstanding but not registered, which were issued upon conversion of the Series C Preferred Stock, or (ii) Series C Holders holding at least a majority of the Common Stock issuable upon conversion of the then issued and outstanding shares of Series C Preferred Stock.

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"Securities Act" means the Securities Act of 1933, as amended, or any successor federal statute, and the rules and regulations of the Commission issued under such Act, as they each may, from time to time, be in effect.

"Series A Holders" shall have the meaning ascribed to it in the preamble to this Agreement.

"Series A Preferred Stock" shall have the meaning ascribed to it in the preamble to this Agreement.

"Series AB Demand Registration" shall have the meaning ascribed to it in Section 2.1(a)(ii).

"Series AB Holders" means the Series A Holders and the Series B Holders.

"Series B Holders" shall have the meaning ascribed to it in the preamble to this Agreement.

"Series B Preferred Stock" shall have the meaning ascribed to it in the preamble to this Agreement.

"Series C Demand Registration" shall have the meaning ascribed to it in Section 2.1(a)(i).

"Series C Holders" shall have the meaning ascribed to it in the recitals to this Agreement.

"Series C Preferred Stock" shall have the meaning ascribed to it in the recitals to this Agreement.

ARTICLE II REGISTRATION RIGHTS.

2.1 Demand Registration.

(a) At any time after the sooner of (x) the closing of an Initial Public Offering (but not within 180 days after the effective date of the Registration Statement filed in respect of that Initial Public Offering) and (y) March 29, 2012, by delivery of written notice to the Company (a "Demand Notice"):

(i) the Requisite Series C Holders may require the Company to register for sale under the Securities Act all or any portion of the Registrable Securities held by the Series C Holders for sale in the manner specified in such Demand Notice (a "Series C Demand Registration"). The Requisite Series C Holders shall be entitled to only two (2) Series C Demand Registrations pursuant to this
Section 2.1(a)(i); provided, that, they may only make demand for one such Series C Demand Registration in any twelve month period, unless any of them shall have had any Registrable Securities excluded from a Registration Statement that was filed during such twelve month period; and

(ii) the Requisite Series AB Holders may require the Company to register for sale under the Securities Act all or any portion of the Registrable Securities held by the Series AB Holders for sale in the manner specified in such Demand Notice; provided, that (i) the portion of the Registrable Securities required to be so registered equals at least 25% of the shares of Common Stock issuable upon

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conversion of the shares of Series A Preferred Stock and Series B Preferred Stock then outstanding and (ii) the aggregate proceeds from the sale of the shares so registered is reasonably expected to exceed $30,000,000 (a "Series AB Demand Registration"). The Requisite Series AB Holders shall be entitled to only two (2) Series AB Demand Registrations pursuant to this Section 2.1(a)(ii); provided, that, they may only make demand for one such Series AB Demand Registration in any twelve month period, unless any of them shall have had any Registrable Securities excluded from a Registration Statement that was filed during such twelve month period; and

(iii) following a change in the "Series C Conversion Price" (as that term is defined in the Articles of Amendment), such that additional shares of Common Stock become issuable upon conversion of the outstanding Series C Preferred Stock, the Requisite Series C Holders may require the Company to register for sale under the Securities Act such additional shares of Common Stock (the "Additional Shares"), but only to the extent the Additional Shares are not at the time covered by an effective Registration Statement or such Additional Shares cannot be added by pre-effective amendment to an existing Registration Statement. Such Registration Statement shall include the plan of distribution specified in the Demand Notice delivered by the Requisite Series C Holders pursuant to this Section 2.1(a)(iii). Such Registration Statement also shall cover, to the extent allowable under the Securities Act (including without limitation Rule 416), such indeterminate number of additional shares of Common Stock resulting from stock splits, stock dividends or similar transactions with respect to the Additional Shares. The Registration Statement (and each amendment or supplement thereto, and each request for acceleration of effectiveness thereof) shall be furnished for review in accordance with Section 2.4(a) prior to its filing or other submission. Notwithstanding anything in this Agreement to the contrary, no demand made pursuant to this Section 2.1(a)(iii) shall be deemed a Series C Demand Registration that reduces the number of such Series C Demand Registrations to which the Series C Holders are entitled hereunder; and

(iv) if the Company is then a registrant entitled to use Form S-3 or any successor form thereto to effect the distribution of such Registrable Securities for public sale or re-sale (as the case may be), (aa) the Requisite Series C Holders may require the Company to register for sale or re-sale under the Securities Act by filing a Registration Statement on Form S-3 or any comparable or successor form thereto for a public offering of all or any portion of the Registrable Securities held by them, or (bb) the Requisite Series AB Holders may require the Company to register for sale or re-sale under the Securities Act by filing a Registration Statement on Form S-3 or any comparable or successor form thereto for a public offering of all or any portion of the of Registrable Securities held by them, in each case, in accordance with the method of disposition specified in the Demand Notice. Whenever the Company is required by this Section 2.1(a)(iv) to effect the registration of Registrable Securities, each of the procedures and requirements of Sections 2.1 and 2.4 shall apply to such registration, and the Company shall cause such Registration Statement to be declared effective within one hundred eighty (180) days after the Company's receipt of the request for such registration. There shall be no limitation on the number of registrations on Form S-3 which may be requested and obtained under this Section 2.1, and such requests and registrations shall not reduce the number of Series C Demand Registrations or Series AB Demand Registrations, as the case may be, to which the Series C Holders or Series AB Holders, as the case may be, are entitled hereunder.

(b) Following receipt of any Demand Notice under this Section 2.1, the Company shall file a Registration Statement including the securities covered by such Demand Notice within thirty (30) days after receipt of such Demand Notice (the "Filing Deadline"), and the Company shall use its best efforts to effect the registration under the Securities Act as soon as practicable, and in any event within one hundred eighty (180) days after receipt of such Demand Notice (the "Effectiveness Deadline"), for public sale or re-sale in accordance with the method of disposition specified in such Demand Notice of the number of Registrable Securities specified in such Demand Notice. If a Registration Statement including the Registrable Securities referenced in the Demand Notice is not (i) filed with the Commission on or

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prior to the applicable Filing Deadline, or (ii) declared effective by the applicable Effectiveness Deadline, then the Company shall make pro rata payments to each Investor whose securities are to be included in such Registration Statement, as liquidated damages (and not as a penalty, as damages are impossible to forecast or predict and these amounts are deemed reasonable in all respects), in an amount equal to 1.5% of the aggregate Market Price (as defined in the Articles of Amendment) (as of the Filing Deadline) of the Investor's securities to be included in such Registration Statement for each 30-day period or pro rata for any portion thereof following the date by which such Registration Statement should have been filed or declared effective, as the case may be, for which no Registration Statement is filed or has not been declared effective, as the case may be, with respect to the Registrable Securities. Such payments shall be in partial compensation to the Investors, and shall not constitute the Investors' exclusive remedy for such events. Such payments shall be made to each Investor in cash. The amounts payable as liquidated damages pursuant to this Section 2.1(b) shall be payable in lawful money of the United States, and amounts payable as liquidated damages shall be paid within two (2) Business Days of the last day of each such 30-day period during which the Registration Statement should have been filed or been declared effective, as the case may be, for which no Registration Statement was filed or had not yet been declared effective, as the case may be, with respect to the Registrable Securities.

(c) If the Initiating Stockholders intend to distribute the Registrable Securities covered by their Demand Notice by means of an underwriting, the Initiating Stockholders shall so advise the Company in their Demand Notice. If the method of disposition is an underwritten public offering, the Initiating Stockholders may designate the managing underwriter of such offering, which designation shall be subject to the Company's approval, not to be unreasonably withheld. The Initiating Stockholders may elect to include in such underwriting all or any part of the Registrable Securities it holds, subject to the limitations required by the managing underwriter as provided for in Section 2.1(d).

(d) A Registration Statement filed pursuant to this Section 2.1 may, subject to the following provisions and in addition to the Registrable Securities, include (i) shares of Common Stock for sale by the Company for its own account and (ii) shares of Common Stock held by persons other than the Company and the Preferred Holders (the "Other Shareholders"), in each case for sale in accordance with the method of disposition specified by the Initiating Stockholders and subject to the exclusions provided herein. If such registration shall be underwritten, the Company, the Preferred Holders and the Other Shareholders proposing to distribute their shares through such underwriting shall enter into an underwriting agreement in customary form with the representative of the underwriter or underwriters selected for such underwriting; the terms of which shall not be more favorable to the Company and such Other Shareholders than the terms afforded therein to the Initiating Stockholders. If and to the extent that the managing underwriter determines that marketing factors require a limitation on the number of shares to be included in such registration, then the shares of Common Stock sought to be registered by the Preferred Holders and the Other Shareholders and shares of Common Stock to be sold by the Company for its own account shall be excluded from such registration to the extent so required by such managing underwriter in the following order of priority: (1st) and unless the Other Shareholders and the Company have otherwise agreed in writing, such exclusion shall be applied first to the shares sought to be registered by the Other Shareholders to the extent any such reduction is required by the managing underwriter; (2nd) then to the shares of Common Stock of the Company to be included for its own account to the extent any such reduction is required by the managing underwriter; (3rd) then the shares sought to be registered by the Series AB Holders to the extent any such reduction is required by the managing underwriter; and (4th) then to the shares sought to be registered by the Series C Holders to the extent any such reduction is required by the managing underwriter. In any event, all securities to be sold other than Registrable Securities of the Series C Holders shall be excluded prior to any exclusion of Registrable Securities of the Series C Holders, if they are participating in such registration, whether or not they are the Initiating Stockholders with respect to such registration. No Registrable Securities or other securities, in either case, excluded from the underwriting by reason of the underwriter's marketing limitation shall be included

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in such registration. If any of the Preferred Holders or any of the Other Shareholders who has requested inclusion in such registration as provided above, disapproves of the terms of the underwriting, then such Preferred Holder(s) or such Other Shareholder(s) may elect to withdraw therefrom by written notice to the Company and the managing underwriter. The securities so withdrawn shall thereupon be withdrawn from registration.

(e) The Company may delay or postpone for up to 45 consecutive days effecting a Series AB or Series C Demand Registration if the Company has delivered a written certificate to each Investor stating that the Board, acting in good faith, has resolved that pursuit of such Demand Registration during such 45-day period would be detrimental to the Company and its shareholders; provided, however, that in the event of any such postponement, the Initiating Stockholders shall be entitled to withdraw the request for such Demand Registration and, if such request is withdrawn, such request shall not count as a Demand Registration hereunder; and provided, further, that the Company may not exercise its rights under this Section 2.1(e) for more than a total 60 days in any eighteen month period.

2.2 Piggy-Back Registration.

(a) If the Company at any time (other than pursuant to Section 2.1) proposes to register any of its securities under the Securities Act for sale to the public, whether for its own account or for the account of other shareholders of the Company or both (except with respect to (i) an Initial Public Offering, (ii) Registration Statements on Forms S-4, S-8 or any successor to such forms, (iii) any Registration Statement including only securities issued pursuant to a dividend reinvestment plan, (iv) a Registration Statement in which the only securities to be registered are securities issuable upon conversion of debt securities or other convertible securities which are also being registered or (v) another form of Registration Statement not available for registering the Registrable Securities for sale to the public), each such time the Company shall promptly give written notice to the Preferred Holders of its intention to do so (each, a "Piggy-Back Notice"). Upon the written request of the Requisite Series C Holders, received by the Company within twenty (20) days after the date of delivery of a Piggy-Back Notice, in accordance with Section 3.4, to register any or all of the Registrable Securities held by the Series C Holders as stated in such request, the Company shall use its best efforts to cause the Registrable Securities as to which registration shall have been so requested to be included in such Registration Statement. If the Registration Statement relates to an underwritten public offering, the Company shall so advise the Preferred Holders as a part of a Piggy-Back Notice. In such event, the Preferred Holders' right to include Registrable Securities in such registration shall be conditioned upon its participation in such underwriting to the extent provided herein. The Preferred Holders, if participating in such distribution, shall enter into an underwriting agreement in customary form with the underwriter or underwriters selected for underwriting by the Company; the terms of which shall be no less favorable to the Preferred Holders than the terms afforded therein to the Company.

(b) Notwithstanding any other provision of this Section 2.2, if the managing underwriter or underwriters in the registration giving rise to the Piggy-Back Notice determine(s) that the number of shares to be included in such registration (including any securities that the Company and the Other Shareholders propose to be included that are not Registrable Securities) exceeds the largest number of shares that can be sold without having an adverse effect on such offering (the "Maximum Offering Size"), the Company will include in such registration, in the following priority, up to the Maximum Offering Size:

(i) first, that number of securities held by the Person(s) (other than the Company and the Series AB Holders) who demanded such registration, if any, as would not cause the offering to exceed the Maximum Offering Size; and

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(ii) second, if the Maximum Offering Size has not then been exceeded, that number of securities proposed to be registered for the account of the Series C Holders;

(iii) third, if the Maximum Offering Size has not then been exceeded, that number of securities proposed to be registered for the account of the holders of the Series A and Series B Preferred Stock, ratably between them treating them as one series for the purpose of this clause (iii);

(iv) fourth, if the Maximum Offering Size has not then been exceeded, that number of securities proposed to be registered by the Company for its own account; and

(v) fifth, if the Maximum Offering Size has not then been exceeded, any securities proposed to be registered for the account of any other Persons (other than the Company and those Persons described in clauses (i), (ii) and (iii) immediately above) with such priorities among them as the Company shall determine.

(c) Any request by a Preferred Holder for inclusion in any registration may be withdrawn, in whole or in part, at any time prior to the effective date of the Registration Statement for such offering. No request for inclusion of, nor the inclusion of, Registrable Securities by a Series C Holder shall be deemed a Series C Demand Registration that reduces the number of such Series C Demand Registrations to which the Series C Holders are entitled hereunder.

(d) The Company shall have the right to terminate or withdraw any registration contemplated under this Section 2.2 prior to the effectiveness of such registration, whether or not the Series C Holders have elected to include securities in such registration.

(e) There shall be no limitation on the number of registrations a Preferred Holder may participate in under this Section 2.2, and any such participation shall not reduce the number of Series C Demand Registrations to which the Series C Holders are entitled hereunder.

2.3 Limitation on Registration. Notwithstanding anything herein to the contrary, the Company shall not be required to file a Registration Statement pursuant to Section 2.1 that would: (i) require the Company to execute a general consent to service of process in any jurisdiction in order to effect such registration if the Company is not already subject to service in such jurisdiction, or (ii) subject the Company to taxation in a jurisdiction where the Company is not otherwise subject to taxation.

2.4 Registration Procedures. If and whenever the Company is required by the provisions of Section 2.1 or 2.2 to effect the registration of any Registrable Securities under the Securities Act, the Company shall, as expeditiously as possible:

(a) Prepare and file with the Commission a Registration Statement on the applicable form with respect to such securities and use its best efforts to cause such Registration Statement to become and remain effective until the earlier of (i) the sale of all of the Registrable Securities covered thereby and
(ii) the first date when all Registrable Securities covered thereby are eligible for sale under Rule 144(k) without regard to any volume or manner of sale limitations; provided, however, that, as soon as practicable but in no event later than five (5) Business Days before filing such Registration Statement, any related prospectus or any amendment or supplement thereto (other than any amendment or supplement made solely as a result of incorporation by reference of documents filed with the Commission subsequent to the filing of such Registration Statement), the Company shall furnish to the Preferred Holders and the underwriters, if any, copies of all such documents proposed to be filed, which documents shall be subject to review by the Preferred Holders and any such underwriters; the Company shall not file

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any Registration Statement or amendment thereto or any prospectus or any supplement thereto (other than any amendment or supplement made solely as a result of incorporation by reference of documents filed with the Commission subsequent to the filing of such Registration Statement) to which the managing underwriters of the applicable offering, if any, or either of the Co-Lead Investors shall have reasonably objected in writing, within four (4) Business Days after receipt of such documents, to the effect that such Registration Statement or amendment thereto or prospectus or supplement thereto does not comply in all material respects with the requirements of the Securities Act and specifying in reasonable detail the reasons therefor (provided that the foregoing shall not limit the a Preferred Holder's right to reasonably object, within four (4) Business Days after receipt of such documents, to any particular information that is to be contained in such Registration Statement, amendment, prospectus or supplement and relates specifically to such Preferred Holder, including without limitation any information describing the manner in which the Preferred Holder acquired Such Registrable Securities and the intended method of distribution of such Registrable Securities), and if the Company is unable to file any such document due to the objections of such underwriters or either of the Co-Lead Investors, the Company shall use its best efforts to cooperate with such underwriters and either of the Co-Lead Investors to prepare, as soon as practicable, a document that is responsive in all material respects to the reasonable objections of either of the Co-Lead Investors;

(b) Permit a single law firm designated by the Co-Lead Investors to represent all of the Series C Holders, and a single law firm designated by the Requisite Series AB Holders to represent the Series AB Holders, to review and comment on the Registration Statement which includes their respective Registrable Securities and all amendments and supplements for a reasonable period prior to filing and to respond to any reasonable objections raised by such counsel.

(c) Prepare and file with the Commission such amendments and supplements to such Registration Statement and the prospectus used in connection therewith as may be necessary to keep such Registration Statement effective for the period specified herein and comply with the provisions of the Securities Act with respect to the disposition of all Registrable Securities covered by such Registration Statement in accordance with the intended method of disposition set forth in such Registration Statement for such period; provided, that, the Company shall comply with the provisions of Section 2.4(a) above;

(d) Furnish to the Preferred Holders and to each underwriter copies of the Registration Statement and each such amendment and supplement thereto (together with all exhibits thereto) and the prospectus included therein and any other prospectus filed under Rule 424 or Rule 434 under the Securities Act as the Preferred Holders and such underwriter reasonably may request in order to facilitate the disposition of the Registrable Securities covered by such Registration Statement;

(e) Use its best efforts to register or qualify the Registrable Securities covered by such Registration Statement under the securities or "blue sky" laws of such jurisdictions as the sellers of the Registrable Securities or, in the case of an underwritten public offering, the managing underwriter reasonably shall request; provided, however, that the Company shall not be required to (i) qualify to transact business as a foreign corporation in any jurisdiction where it is not so qualified, (ii) consent to general service of process or (iii) submit to taxation in any such jurisdiction, unless the Company is already subject to service or subject to taxation in such jurisdiction;

(f) Use its best efforts to list or qualify the Registrable Securities covered by such Registration Statement on any securities exchange or quotation system on which the Common Stock is then listed;

(g) Comply in all material respects with all applicable rules and regulations under the Securities Act and Exchange Act;

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(h) Immediately notify the Preferred Holders and each underwriter under such Registration Statement, at any time when a prospectus relating thereto is required to be delivered under the Securities Act, of the happening of any event which has resulted or would result in the prospectus contained in such Registration Statement, as then in effect, to include an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, and promptly prepare and furnish to such Investor and underwriter an updated prospectus;

(i) If the offering is underwritten, and at each Preferred Holder's request, use its best efforts to furnish on the date that Registrable Securities are delivered to the underwriters for sale pursuant to such registration (i) an opinion, dated such date, of counsel to the Company, addressed to the underwriters and the Preferred Holder, to such effect as reasonably may be requested by the underwriters, and (ii) a letter, dated such date, from the independent public accountants retained by the Company, addressed to the underwriters and, if applicable, the Preferred Holder, stating that they are independent public accountants within the meaning of the Securities Act and that, in the opinion of such accountants, the financial statements of the Company included in the Registration Statement or the prospectus, or any amendment or supplement thereof, comply as to form in all material respects with the applicable accounting requirements of the Securities Act, and such letter shall additionally cover such other financial matters (including information as to the period ending no more than five (5) Business Days prior to the date of such letter) with respect to such registration as such underwriters reasonably may request, and deliver copies of such letter to the Investor;

(j) For the purpose of participating in any Registration Statement, upon reasonable notice and at reasonable times during normal business hours, make available for inspection by the Preferred Holder, any underwriter participating in any distribution pursuant to such Registration Statement, and any attorney, accountant or other agent retained by the Preferred Holder or such underwriter, reasonable access to all financial and other records, pertinent corporate documents and properties of the Company, as such parties may reasonably request, and cause the Company's officers, directors and employees to supply all information reasonably requested by any of the Preferred Holder, such underwriter, attorney, accountant or agent in connection with such Registration Statement; provided, however, the Company shall neither disclose the existence or content of any material, non-public information concerning the Company at a time when possession of such information by the Preferred Holder would, under applicable law, prohibit the Preferred Holder from trading in the Company's securities;

(k) Notify the Preferred Holders (i) when the prospectus or any prospectus supplement or post-effective amendment has been filed, and, with respect to such Registration Statement or any post-effective amendment, when the same has become effective, such notice to be given no later than 9:00 a.m. (New York time) of the morning on the Business Day immediately after the declaration of effectiveness by the Commission, (ii) immediately of any request by the Commission for amendments or supplements to such Registration Statement or to amend or supplement such prospectus or for additional information, (iii) immediately of the issuance by the Commission of any stop order suspending the effectiveness of such Registration Statement or the initiation of any proceeding for that purpose and (iv) immediately of the suspension of the qualification of securities covered by such registration for offering or sale in any jurisdiction, or of the initiation of any proceeding for any of such purposes;

(k) Take such other actions as the Preferred Holders or the underwriters reasonably request in order to expedite or facilitate the disposition of the Registrable Securities, including, without limitation, preparing for, and participating in, such number of "road shows" and all such other customary selling efforts as the underwriters reasonably request in order to expedite or facilitate such disposition;

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(l) use its reasonable best efforts to prevent the issuance of any stop order or other suspension of effectiveness and, if such order is issued, obtain the withdrawal of any such order at the earliest possible moment; and

(m) otherwise use its reasonable best efforts to comply with all applicable rules and regulations of the Commission under the Securities Act and the Exchange Act and take such other actions as may be reasonably necessary to facilitate the registration of the Registrable Securities hereunder; and make available to its security holders, as soon as reasonably practicable, but not later than the Availability Date (as defined below), an earnings statement covering a period of at least twelve (12) months, beginning after the effective date of each Registration Statement, which earnings statement shall satisfy the provisions of Section 11(a) of the Securities Act (for the purpose of this
Section 2.4(m), "Availability Date" means the 45th day following the end of the fourth fiscal quarter that includes the effective date of such Registration Statement, except that, if such fourth fiscal quarter is the last quarter of the Company's fiscal year, "Availability Date" means the 90th day after the end of such fourth fiscal quarter).

2.5 Expenses. The Company shall bear all reasonable expenses incurred in complying with Sections 2.1, 2.2 and 2.4, including, without limitation, all registration and filing fees, printing expenses, fees and disbursements of counsel and independent public accountants for the Company, fees and expenses (including counsel fees) incurred in connection with complying with state securities or "blue sky" laws, reasonable fees and disbursements of one law firm designated by the Co-Lead Investors and one law firm designated by the Series AB Holders, of transfer agents and registrars and costs of any insurance which might be obtained by the Company with respect to the offering by the Company.

2.6 Indemnification and Contribution.

(a) The Company shall indemnify and hold harmless, to the fullest extent permitted by law, each Preferred Holder and its Affiliates and the directors, officers, employees, investors, partners and agents of each Preferred Holder and its Affiliates, from and against any and all losses, claims, damages, liabilities and expenses (including without limitation reasonable attorney fees and disbursements and other expenses incurred in connection with investigating, preparing or defending any action, claim or proceeding, pending or threatened and the costs of enforcement hereof) (collectively, "Losses") to which any such Person may become subject, arising out of or based upon any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement covering any Registrable Securities, any related prospectus or preliminary prospectus, or any amendment or supplement thereto, or any omission or alleged omission to state in any thereof a material fact required to be stated therein or necessary to make the statements therein (in the case of a prospectus or prospectus supplement, in light of the circumstances under which they were made) not misleading; provided, however, that the Company will not be liable in any such case to the extent any Losses arise out of or are based upon an untrue statement of a material fact or an omission to state a material fact in such Registration Statement, prospectus, preliminary prospectus, amendment or supplement, as the case may be, made or omitted, as the case may be, in express reliance upon and in strict conformity with written information furnished to the Company by a Preferred Holder expressly for use therein. This indemnity is in addition to any liability that the Company may otherwise have. The Company shall also indemnify any underwriters of the Registrable Securities, selling brokers, dealer managers and similar securities industry professionals participating in the distribution and their officers and directors and each Person who controls such underwriters or other Persons (within the meaning of the Securities Act) to the same extent as provided above with respect to the indemnification of the Preferred Holder and its Affiliates as described above, if so required by the underwriting agreement entered into in connection with the registration of such Registrable Securities

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(b) In connection with any Registration Statement covering Registrable Securities, each Preferred Holder whose Registrable Securities were included in such Registration Statement shall furnish to the Company in writing such information with respect to the Preferred Holder as the Company reasonably requests for use in connection with such Registration Statement, any related Prospectus or preliminary prospectus, or any amendment or supplement thereto, and shall indemnify, to the fullest extent permitted by law, the Company, the Company's directors, officers, employees and agents, each Person who controls the Company (within the meaning of the Securities Act), against all Losses arising out of or based upon any untrue statement of a material fact contained in any Registration Statement covering any Registrable Securities, any related Prospectus or preliminary prospectus, or any amendment or supplement thereto, or any omission to state in any such prospectus, amendment or supplement, a material fact required to be stated therein or necessary to make the statements therein (in the case of a prospectus or prospectus supplement, in light of the circumstances under which they were made) not misleading, in each case to the extent, and only to the extent, that the Losses arise out of or are based upon an untrue statement of a material fact or an omission to state a material fact in such Registration Statement or in such related Prospectus, preliminary prospectus, amendment or supplement, as the case may be, made or omitted, as the case may be, in express reliance upon and in strict conformity with written information furnished to the Company by the Preferred Holder expressly for use therein. Notwithstanding anything in this Agreement to the contrary, in no event shall the Preferred Holder's indemnification obligation exceed the dollar amount of the proceeds actually received by such Preferred Holder from the sale of the Registrable Securities under the Registration Statement giving rise to such obligation.

(c) Promptly after receipt by any Person (the "Indemnified Person") of notice of any demand, claim or circumstances which would or might give rise to a claim or the commencement of any action, proceeding or investigation in respect of which indemnity may be sought pursuant to Section 2.7, such Indemnified Person shall promptly notify the party obligated to provide indemnification under this Section 2.7 in respect thereof (an "Indemnifying Party") and the Indemnifying Party shall assume the control and defense thereof, including the employment of counsel reasonably satisfactory to such Indemnified Person, and shall assume the payment of all fees and expenses in connection with such defense and such counsel; provided, however, that the failure of any Indemnified Person to so notify the Indemnifying Party shall not relieve the Indemnifying Party of its obligations hereunder except to the extent that the Indemnifying Party is actually and materially prejudiced by such failure to notify. In any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless: (i) the Indemnifying Party and the Indemnified Person shall have mutually agreed to the retention of such counsel; or (ii) in the reasonable judgment of counsel to such Indemnified Person (x) representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them or (y) if there are one or more defenses available to such Indemnified Person that is/are not available to the Indemnifying Party. Without the prior written consent of the Indemnified Person, which consent shall not be unreasonably withheld, delayed or conditioned, the Indemnifying Party shall not effect any settlement of any pending or threatened action, claim or proceeding with respect to any Indemnified Person, unless such settlement includes an unconditional release of such Indemnified Person from all liability arising out of such proceeding.

(d) (i) If the indemnification provided for in this Section 2.7 from the Indemnifying Party is unavailable to an Indemnified Person hereunder or is inadequate in respect of any Losses for which indemnification is provided under this Section 2.7, then the Indemnifying Party, in lieu of indemnifying such Indemnified Person, shall contribute to the amount paid or payable by such Indemnified Person as a result of such Losses in such proportion as is appropriate to reflect the relative fault of the Indemnifying Party, on the one hand, and Indemnified Person(s), on the other hand, in connection with the actions that resulted in such Losses, as well as any other relevant equitable considerations. The relative fault of such Indemnifying Party and Indemnified Person shall be determined

12

by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact, has been made by, or relates to information supplied by, such Indemnifying Party or Indemnified Persons, and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such action. The amount paid or payable by a party as a result of the Losses referred to above shall be deemed to include, subject to the limitations set forth in Section 2.7(c), any legal or other fees or expenses reasonably incurred by such party in connection with any investigation or proceeding.

(ii) The parties hereto agree that it would not be just and equitable if contribution pursuant to this Section 2.7(d) were determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in Section 2.7(d)(i). Notwithstanding any other provision hereof, in no event shall the Investor's contribution obligation exceed the excess of (A) the dollar amount of the proceeds received by the Investor upon the sale of the Registrable Securities giving rise to such contribution obligation over (B) the dollar amount of any damages that the Preferred Holder has otherwise been required to pay by reason of the untrue or alleged untrue statement or omission or alleged omission giving rise to such obligation. No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation.

(iii) If indemnification is available under this Section 2.7, the Indemnifying Parties shall indemnify each Indemnified Person to the fullest extent provided in Section 2.7(a) and Section 2.7(b) without regard to the relative fault of said Indemnifying Party or Indemnified Person or any other equitable consideration provided for in this Section 2.7(d).

(iv) If any provision of an indemnification or contribution clause in an underwriting agreement or agency agreement executed by or on behalf of the Investor differs from a provision in this Section 2.7, such provision in the underwriting agreement shall determine the Investor's rights in respect thereof.

(e) Notwithstanding anything in this Agreement to the contrary, the indemnities and obligations provided in this Section 2.7 shall survive the transfer of any Registrable Securities by the Preferred Holder.

2.7 Reporting. With a view to making available the benefits of certain rules and regulations of the Commission which may at any time permit the sale of the Registrable Securities to the public without registration, so long as the Company is subject to the reporting requirements of the Exchange Act, the Company shall:

(a) make and keep public information available, as contemplated in Rule 144(c) under the Securities Act (or any successor rule); and

(b) use its best efforts to file with the Commission in a timely manner all reports and other documents required of the Company under the Securities Act and the Exchange Act to, among other things, remain eligible to use Form S-3 (or any successor thereto).

2.8 Furnishing Information.

(a) The Company shall make available, during normal business hours, for inspection and review by each of the Investors whose Registrable Securities are to be included in a Registration Statement, and their respective advisors and representatives (who may or may not be Affiliated with such Investor), and any underwriter participating in any disposition of Common Stock on

13

behalf of the such Investors pursuant to a Registration Statement or amendments or supplements thereto or any blue sky, NASD or other filing, all financial and other records, all filings with the Commission, and all other corporate documents and properties of the Company as may be reasonably necessary for the purpose of such review, and cause the Company's officers, directors and employees, within a reasonable time period, to supply all such information reasonably requested by such Investors or any such representative, advisor or underwriter in connection with such Registration Statement (including, without limitation, in response to all questions and other inquiries reasonably made or submitted by any of them), prior to the filing and effectiveness of the Registration Statement for the sole purpose of enabling such Investors and such representatives, advisors and underwriters and their respective accountants and attorneys to conduct initial due diligence with respect to the Company and the accuracy of such Registration Statement. Notwithstanding the foregoing, the Company shall not disclose material nonpublic information to the Investors, or to advisors to or representatives of the Investors, unless prior to disclosure of such information the Company identifies such information as being material nonpublic information and provides the Investors, such advisors and representatives with the opportunity to accept or refuse to accept such material nonpublic information for review.

(b) It shall be a condition precedent to the obligations of the Company to take any action pursuant to this Article II that each Preferred Holder furnish to the Company in writing such information regarding such Preferred Holder, the Registrable Securities held by it and the intended method of disposition of such securities as shall be required to effect the registration thereof.

2.9 Additional Registration Rights. As of the date hereof, neither the Company nor any of its security holders (other than as set forth on Schedule 2.10 attached hereto) has any right to include securities of the Company in a Registration Statement other than the Registrable Securities, and the Company shall not, after the date hereof, enter into any agreement providing any rights to be included with a Registration Statement to any of its security holders or potential security holders, without the prior written consent of the Requisite Series C Holders. Until after the effective date of a Registration Statement which includes Registrable Securities owned by Series C Holders, the Company shall not file any other Registration Statement solely with respect to shares to be offered by the Company or any Series AB Holder, including, without limitation, a Registration Statement on Form S-1, S-3, S-4 or S-8 or any successor form to any of the foregoing, without the consent of the Requisite Series C Holders.

2.10 Lock Up. Each Series AB Holder shall, in connection with any registration of the Company's securities, upon the request of the Company or the underwriters managing any underwritten offering of the Company's securities, agree in writing not to effect any sale, transfer, disposition or distribution of any of its Registrable Securities (other than that included in such registration) without the prior written consent of the Company or such underwriters, as the case may be, for such period of time not to exceed one hundred eighty (180) days from the effective date of such registration as the Company or the underwriters may specify.

ARTICLE III MISCELLANEOUS.

3.1 Successors and Assigns. This Agreement may not be assigned by a party hereto without the prior written consent of the Company or Cerberus, as applicable, and, if such assignment materially adversely affects the Series AB Holders, the Requisite Series AB Holders; provided, however, that a Preferred Holder may assign its rights and delegate its duties hereunder in whole or in part, without the prior written consent of any other party, to an Affiliate and to any Person to whom such Preferred Holder transfers any of the Registrable Securities, provided, that, no such assignment shall be effective or confer any right on any such assignee unless, prior to such assignment, the assignee agrees in writing that such assignee will be bound by all provisions binding on such Preferred Holder. The provisions of this

14

Agreement shall inure to the benefit of and be binding upon the respective permitted successors and assigns of the parties. Except for any other provisions of this Agreement expressly to the contrary, nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

3.2 Counterparts; Faxes. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement may also be executed via facsimile, which shall be deemed an original.

3.3 Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

3.4 Notices. Unless otherwise provided, any notice required or permitted under this Agreement shall be given in writing and shall be deemed effectively given as hereinafter described: (i) if given by personal delivery, then such notice shall be deemed given upon such delivery; (ii) if given by telex or telecopier, then such notice shall be deemed given upon receipt of confirmation of complete transmittal with a confirming copy to be sent by first class mail;
(iii) if given by mail, then such notice shall be deemed given upon the earlier of (A) receipt of such notice by the recipient or (B) three (3) days after such notice is deposited in first class mail, postage prepaid; and (iv) if given by an internationally recognized overnight air courier, then such notice shall be deemed given one (1) Business Day after delivery to such carrier. All notices shall be addressed to the party to be notified at the address as follows, or at such other address as such party may designate by ten (10) days' advance written notice to the other party:

If to the Company:

Molecular Insight Pharmaceuticals, Inc.
160 Second Street
Cambridge, Massachusetts 02142
Attn: David Barlow
Fax: (617) 492-5664

With a copy to:

Foley & Lardner LLP
111 Huntington Avenue
26th Floor
Boston, Massachusetts 02199
Attn: Gabor Garai, Esq.
Fax: (617) 342-4001

If to any of the Investors:

to the addresses set forth on the signature pages attached
hereto.

If to any Series AB Holder:

to the addresses set forth on Schedule A attached hereto.

15

or to such other address as any party hereto shall notify the other parties hereto (as provided above) from time to time.

3.5 Expenses. In the event that legal proceedings are commenced by any party to this Agreement against another party to this Agreement in connection with this Agreement, the party or parties which do not prevail in such proceedings shall severally, but not jointly, pay their pro rata share of the reasonable attorneys' fees and other reasonable out-of-pocket costs and expenses incurred by the prevailing party in such proceedings.

3.6 Amendments and Waivers. This Agreement shall not be amended without the prior written consent of (i) the Requisite Series C Holders and (ii) if such amendment materially adversely affects the Series AB Holders, the Requisite Series AB Holders. The Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company shall have obtained the written consent to such amendment, action or omission to act, of (i) the Requisite Series C Holders and (ii) if such amendment, action or omission to act materially adversely affects the Series AB Holders, the Requisite Series AB Holders.

3.7 Publicity. No public release or announcement concerning the transactions contemplated by this Agreement shall be issued by the Company or any of the Preferred Holders without, in the case of a release or announcement by any of the Preferred Holders, the prior written consent of the Company, and, in the case of a release or announcement by the Company, prior written consent of the Requisite Series C Holders, which in each case, shall not be unreasonably withheld; provided, however, in the case of any release or announcement that may be required by law, such release or announcement may be made without prior consent, but the Company or the Requisite Series C Holders, as the case may be, shall allow the other, to the extent reasonably practicable in the circumstances, reasonable time to comment on such release or announcement in advance of its dissemination.

3.8 Severability. Any provision of this Agreement that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof but shall be interpreted as if it were written so as to be enforceable to the maximum extent permitted by applicable law, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. To the extent permitted by applicable law, the parties hereby waive any provision of law which renders any provision hereof prohibited or unenforceable in any respect.

3.9 Entire Agreement. This Agreement, including Schedules, constitutes the entire agreement among the parties hereof with respect to the subject matter hereof and thereof and supersede all prior agreements and understandings, both oral and written, between the parties with respect to the subject matter hereof and thereof.

3.10 Further Assurances. The parties shall execute and deliver all such further instruments and documents and take all such other actions as may reasonably be required to carry out the transactions contemplated hereby and to evidence the fulfillment of the agreements herein contained.

3.11 Governing Law; Consent to Jurisdiction. This Agreement shall be governed by, and construed in accordance with, the internal laws of the State of New York without regard to the choice of law principles thereof. Each of the parties hereto irrevocably submits to the jurisdiction of the courts of the State of New York located in New York County and the United States District Court for the Southern District of New York for the purpose of any suit, action, proceeding or judgment relating to or arising out of this Agreement and the transactions contemplated hereby. Service of process in connection with any such suit, action or proceeding may be served on each party hereto anywhere in the world by the same

16

methods as are specified for the giving of notices under this Agreement. Each of the parties hereto irrevocably consents to the jurisdiction of any such court in any such suit, action or proceeding and to the laying of venue in such court. Each party hereto irrevocably waives any objection to the laying of venue of any such suit, action or proceeding brought in such courts and irrevocably waives any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. THE COMPANY AND EACH OF THE INVESTORS, SERIES A HOLDERS AND SERIES B HOLDERS HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING RELATING TO OR ARISING OUT OF THIS AGREEMENT OR ANY OTHER TRANSACTION DOCUMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY.

3.12 Independent Nature of Investors' Obligations and Rights. Except as expressly provided herein and therein, the obligations of each Investor under this Agreement are several and not joint with the obligations of any other Investor, and no Investor shall be responsible in any way for the performance of the obligations of any other Investor under this Agreement. Nothing contained herein, and no action taken by any Investor (including, without limitation, any of the Co-Lead Investors) pursuant hereto or thereto, shall be deemed to constitute the Investors as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Investors are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by this Agreement. Each Investor acknowledges that no other Investor (including, without limitation, any of the Co-Lead Investors) has acted as agent for such Investor in connection with this Agreement or in making its investment in the Company and that no Investor (including, without limitation, any of the Co-Lead Investors) will be acting as agent of such Investor in connection with monitoring its investment in the Company or enforcing its rights under this Agreement. Each Investor shall be entitled to independently protect and enforce its rights, including, without limitation, the rights arising out of this Agreement, and it shall not be necessary for any other Investor to be joined as an additional party in any proceeding for such purpose. Notwithstanding anything contained in this Agreement to the contrary, neither of the Co-Lead Investors shall have any duty, fiduciary or otherwise, to any other Investor by virtue of such Investor serving as a Co-Lead Investor or otherwise.

3.13 Injunctive Relief. It is acknowledged that it will be impossible to measure the damages that would be suffered by an Investor if the Company fails to comply with the provisions of this Agreement and that in the event of any such failure, the Investor will not have an adequate remedy at law. The Investor shall, therefore, be entitled to obtain specific performance of any of the Company's obligations hereunder and to obtain immediate injunctive relief. The Company shall not argue, as a defense to any proceeding for such specific performance or injunctive relief, that the Investor has an adequate remedy at law.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

17

[COMPANY SIGNATURE PAGE]

IN WITNESS WHEREOF, the parties hereto have executed this Agreement or caused this Agreement to be executed by their duly authorized representatives, as of the date first written above.

THE COMPANY:

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By: /s/ David S. Barlow
    -------------------------------
Name:
Title:

18

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

CERBERUS PARTNERS, L.P.

By: Cerberus Associates, LLC,
its General Partner

By: /s/ Seth Plattus
    -----------------
    Seth Plattus
    Managing Director

Address: 299 Park Avenue 22nd Floor New York, NY 10171

With a copy to (which shall not be deemed notice for purposes of the Agreement):

Lowenstein Sandler PC 65 Livingston Avenue Roseland, NJ 07068 Attn: Robert G. Minion, Esq.

Fax: (973) 597-2400

19

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Andrew R Midler Family Trust 5/99

By: /s/ Andrew R Midler
    ----------------------------------
    Name: Andrew R Midler
    Title: Trustee

Address: 283 Summit Ave Mill Valley Ca 94941

With a copy to (which shall not be deemed notice for purposes of the Agreement):




20

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

John D. Singer, Esq.

By: /s/ John D. Singer, Esq.
    --------------------------------
    Name: John D. Singer, Esq.
    Title:

Address: 200 East 69th Street Apartment #18-E New York, NY 10021

With a copy to (which shall not be deemed notice for purposes of the Agreement):




21

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Michael C. Deutsch

By: /s/ Michael C. Deutsch
    ----------------------------------
Name: Michael C. Deutsch
Title:

Address: 331 Madison Ave., 3rd Floor New York, NY 10017

With a copy to (which shall not be deemed notice for purposes of the Agreement):




22

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

POITRAS, JAMES W. & PATRICIA T., JTWROS

By: /s/ James W. Poitras
    --------------------
    Name: James W. Poitras
    Title:

     /s/ Patricia T. Poitras
     ------------------------
     Patricia T. Poitras

BOTH AS INDIVIDUALS AND AS
TRUSTEES OF THEIR RESPECTIVE
REVOCABLE TRUST

Address:   M/M JAMES W. POITRAS
          3100 SPRINGHEAD COURT
         NARCOOSSEE FL 34771-8554

With a copy to (which shall not be deemed notice for purposes of the Agreement):




23

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Carol Frank

By: __________________________________
Name:
Title:

Address: 11529 Conway Rd.
St. Louis MO 63131

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




24

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Benjamin M. Frank Trust

By: /s/ Benjamin M. Frank
    ---------------------
    Name: Benjamin M. Frank
    Title: Trustee

Address: 106 Breckenwood Way Sacramento, CA 95864

With a copy to (which shall not be deemed notice for purposes of the Agreement):




25

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

[ILLEGIBLE]

By: ______________________________
Name:
Title:

Address: 16413 NE 135th St
Redmond, WA 98052

With a copy to (which shall not be deemed
notice for purposes of the Agreement):

Kristine Davy
16413 NE 135 St
Redmond WA 98052

26

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Rajpal Sandhu

By: /s/ Mary C Henry
    ----------------
    Name: RAJPAL SANDHU &  MARY HENRY
    Title:

Address: 420 FAMILY FARM ROAD
WOOD SIDE, CA-94062
650-529-0606
Raj@RajSandhu.com

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




27

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:


By: /s/ James T. Lenehan
    -------------------------------
    Name: JAMES T. LENEHAN
    Title:

Address: 1586 HAMPTON RD
RYDAL, PA

19046

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




28

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:

LIONEL N. STERLING REVOCABLE TRUST

By: /s/ Lionel N. Sterling
    ------------------------------
    Name: LIONEL N. STERLING
    Title: TRUSTEE

Address: 631 WEST RD.


NEW CANAAN CT.
06940

With a copy to (which shall not be deemed
notice for purposes of the Agreement):

LIONEL N. STERLING
c/o EQUITY RESOURCES INC 4th FL
5 GREENWICH OFFICE PARK
GREENWICH CT. 06831

29

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

America Durham, L.P.

By: /s/ T. K. Duggan
    ----------------
    Name: T. K. DUGGAN
    Title: MANAGING PRINCIPAL

Address: 680 SF Ave 22nd Floor N.Y., N.Y. 10019

With a copy to (which shall not be deemed notice for purposes of the Agreement):




30

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

International Durham, L.P.

By: /s/ T. K. Duggan
    ----------------
    Name: T. K. Duggan
    Title: MANAGING PRINCIPAL

Address: 680 SF Ave 22nd Floor N.Y., N.Y. 10019

With a copy to (which shall not be deemed notice for purposes of the Agreement):




31

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Institutional Benchmarks Master Fund

By: Garry Crowder

Name: Garry Crowder Title: Director

Address: _____________________________

With a copy to (which shall not be deemed notice for purposes of the Agreement):




32

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

RICHARD SIMON

By: /s/ Richard Simon
    -----------------
    Name:
    Title:

Address: 219 LAKE AVENUE
NEWTON, MA 02461

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




33

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:


By: /s/ William R. Ebsworth
    --------------------------------
    Name: WILLIAM R. EBSWORTH
    Title:

Address: 17 [ILLEGIBLE] RD
WESTON MA 02493

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




34

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Alan N. Berro

By: /s/ Alan N. Berro
    -------------------
    Name:
    Title:

Address: P.O. BOX 15155
BEVERLY HILLS, CA

90209

With a copy to (which shall not be deemed
notice for purposes of the Agreement):




35

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Renee M Noto

By: /s/ Renee M Noto
    ----------------
    Name:
    Title:

Address: 275 Stanwich Road Greenwich, CT 06830

With a copy to (which shall not be deemed notice for purposes of the Agreement):


36

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

THE RAPTOR GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation,
Investment Advisor

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):


37

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

THE TUDOR BVI GLOBAL PORTFOLIO LTD.

By: Tudor Investment Corporation,
Trading Advisor

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):


38

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

TUDOR PROPRIETARY TRADING, L.L.C.

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):


39

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

/s/ William C Smith
    ---------------------------------------
    William C Smith

/s/ Dana Davis Smith
    ---------------------------------------
    Dana Davis Smith

By: _______________________________________
JOINT TENANTS WITH RIGHT OF SURVIVORSHIP

Address: 218 RIVER PARK DRIVE
GREAT FALLS, VA
22066

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):


40

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

THE ALTAR ROCK FUND L.P.

By: Tudor Investment Corporation,
General Partner

By: /s/ William T. Flaherty
    -------------------------
    Name: William T. Flaherty
    Title: Managing Director

Address: c/o Tudor Investment Corporation 50 Rowes Wharf, 6th Floor Boston, MA 02110

With a copy to (which shall not be deemed notice for purposes of the Agreement):


41

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Julie R Frank, Trustee

By: /s/ Julie R Frank Revocable Trust
    ---------------------------------
    Dated August 13, 2001
    Name:
    Title:

Address: 3 Roclare Lane St. Louis MO 63131

With a copy to (which shall not be deemed notice for purposes of the Agreement):


42

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER

By: /s/ John C. Otsuki
    ____________________________
    Name: John C. Otsuki
    Title:

Address: 4718 MERIVALE RD.


CHEVY CHASE, MARYLAND 21815

With a copy to (which shall not be deemed
notice for purposes of the Agreement):


43

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

MedCap Partners L.P.

By: /s/ [ILLEGIBLE]
    -------------------------
    Name: [ILLEGIBLE]
    Title: Managing Member

Address: 500 Third Street, Suite 535 San Francisco, CA 94107

With a copy to (which shall not be deemed notice for purposes of the Agreement):




44

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

MedCap Master Fund, L.P.

By: /s/ [ILLEGIBLE]
    ----------------------------
    Name: [ILLEGIBLE]
    Title: Managing Member of the GP

Address: ATC Trustees (Cayman) Limited
[ILLEGIBLE]

George Town,
Grand Cayman,
Cayman Islands

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):

500 Third Street Suite 535
San Francisco CA 94107

45

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Kenneth Rubin

By: /s/ Kenneth Rubin
    ------------------
    Name: Individually
    Title:

Address: 68 Barbers Point Road Sands Point, NY 11050

With a copy to (which shall not be deemed notice for purposes of the Agreement):




46

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:


By: /s/ William P. Rice
    -------------------------
    Name: William P. Rice
    Title:

Address: P.O. BOX 1599
DUXBURY, MA

02331

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




47

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

JAMES J. GOLL

By: /s/ James J. Goll
    -------------------------
    Name: JAMES J. GOLL
    Title:

Address: 32 Three Wells Lane
DARIEN, CT 06820

(203) 656-0228
jjcg@SBCGLOBAL.NET

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




48

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:


By: /s/ James M. Hirshberg
    -------------------------
    Name: JAMES M. HIRSHBERG
    Title:

Address: 62 PRINCE ST
WEST NEWTON, WA 02465

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




49

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:

Dana Doe

By: /s/ Dana Doe
    -------------------------
    Name:
    Title:

Address: 12 McCall Rd Winchester, MA 01890

With a copy to (which shall not be deemed notice for purposes of the Agreement):




50

[SERIES C HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES C HOLDER:


By: /s/ Daniel Frank
    -------------------------
    Name: DANIEL FRANK
    Title:

Address: 19 WHALING ROAD
DARIEN CT

06820

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




51

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:

CERBERUS PARTNERS, L.P.

By: Cerberus Associates, LLC, its General Partner

By: /s/ [ILLEGIBLE]
    --------------------------------
    Name: [ILLEGIBLE]
    Title: Managing Director

Address: 299 Park Avenue, 22nd floor New York, NY 10171

With a copy to (which shall not be deemed notice for purposes of the Agreement):

Lowenstein Sandler PC
65 Livingston Avenue

Roseland, NJ 07068
Attn: Robert G. Miman, Esq.
Fax: (973)597-2400

52

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:

FREDERICK FRANK

By: /s/ Frederick Frank
    -------------------------
    Name:
    Title:

Address: 109 East 91st Street New York, New York 10128

With a copy to (which shall not be deemed notice for purposes of the Agreement):




53

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, The undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:

MEYTHALER INVESTMENT PARTNERS, LLC

By: /s/ L. Charles Meythaler
    --------------------------------
    Name: L. Charles Meythaler
    Title: Managing Shareholder

Address: 399 Wahackme Road New Canaan ,CT 06840

With a copy to (which shall not be deemed notice for purposes of the Agreement):




54

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, THE undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:


By: /s/ Gerald Izzi MD
    --------------------------------
    Name: Gerald Izzi
    Title:

Address: 156 Ivy ST
BROOKLING MA 02446

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




55

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:


By: /s/ Ines Capelli
    --------------------------------
    Name:
    Title:

Address: 104 Marlborough St Boston, MA 02116

With a copy to (which shall not be deemed notice for purposes of the Agreement):




56

[SERIES B HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES B HOLDER:


By: /s/ John C. Otsuki
    --------------------------------
    Name: JOHN C Otsuki
    Title:

Address: 4718 MERIVALE RD.


CHEVY CHASE, MD 20815

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




57

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:


By: /s/ Kevin Maresca
    --------------------------------
    Name: Kevin Maresca
    Title:

Address: 13 Bailey Rd Tewksbury, MA 01876

With a copy to (which shall not be deemed notice for purposes of the Agreement):


58

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:


By: /s/ John C. Otsuki
    --------------------------------
    Name: JOHN C. OTSUKI
    Title:

Address: 4718 MERIVALE RD.


CHEVY CHASE, MD 20815

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




59

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the first date above written.

NAME OF SERIES A HOLDER:

MEYTHALER INVESTMENT PARTNERS, LLC

By: /s/ L. Charles Meythaler
    --------------------------------
    Name: L. Charles Meythaler
    Title: Managing Shareholder

Address: 399 Wahackme Road New Canaan, CT 06840

With a copy to (which shall not be deemed notice for purposes of the Agreement):




60

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:

OKJIN KIM

By: /s/ Okjin Kim
    --------------------------------
    Name:
    Title:

Address:____________________________

With a copy to (which shall not be deemed notice for purposes of the Agreement):




61

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:

ANN BARLOW

By: /s/ Ann Barlow
    --------------------------------
    Name:
    Title:

Address:____________________________

With a copy to (which shall not be deemed notice for purposes of the Agreement):




62

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:


By: /s/ John F. Brennan
        Deborah L. Brennan
    --------------------------------
    Name: John F. Brennan or
          Deborah L. Brennan
    Title: [ILLEGIBLE]

Address: 477 Far Reach Rd.


Westwood, MA 02090

With a copy to (which shall not be
deemed notice for purposes of the
Agreement):




63

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:

By: Jack L. Barlow
Name: Jack L. Barlow Title: Stockholder

Address: 48 COVE ST.

DUXBURY, MA 02332

With a copy to (which shall not be deemed notice for purposes of the Agreement):




64

[SERIES A HOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF SERIES A HOLDER:

POITRAS, JAMES W. & PATRICIA

T., JTWROS

/s/ [ILLEGIBLE]                          By: /s/ James W. Poitras
---------------------------                  ------------------------
Patricia T. Poitras                          Name: James W. Poitras

Title:

BOTH AS INDIVIDUALS AND AS

TRUSTEES OF THEIR RESPECTIVE             Address:   M/M JAMES W. POITRAS
REVOCABLE TRUST                                     --------------------------
                                                    3100 SPRINGHEAD COURT
                                                    --------------------------
                                                    NARCOOSSEE FL 34771-8554
                                                    --------------------------

With a copy to (which shall not be deemed notice for purposes of the Agreement):




65

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

MICHAEL C. DEUTSCH

By: /s/ MICHAEL C. DEUTSCH
    ------------------------
    Name: MICHAEL C. DEUTSCH
    Title:

Address: 331 MADISON AVE., Fl. 3

NEW YORK, NY 10017

With a copy to (which shall not be deemed notice for purposes of the Agreement):




66

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

JOHN D. SINGER

By: /s/ John D. Singer
    ------------------------
    Name: JOHN D. SINGER
    Title:

Address: 331 Madison Ave., F1. 3 New York, NY 10017

With a copy to (which shall not be deemed notice for purposes of the Agreement):




67

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

POITRAS, JAMES W. & PATRICIA

T., JTWROS

/s/ Patricia T. Poitras                  By: /s/ James W. Poitras
--------------------------                   ------------------------
Patricia T. Poitras                          Name: James W. Poitras
                                             Title:

BOTH AS INDIVIDUALS AND AS               Address:  M/M JAMES W. POITRAS
TRUSTEES OF THEIR RESPECTIVE                       ------------------------
REVOCABLE TRUST                                    3100 SPRINGHEAD COURT
                                                   ------------------------
                                                   NARCOOSSEE FL 34771-8554
                                                   ------------------------

                                         With a copy to (which shall not be
                                         deemed notice for purposes of the
                                         Agreement):

                                         ----------------------------------
                                         ----------------------------------
                                         ----------------------------------

68

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

ANN BARLOW

By: /s/ Ann Barlow
    ------------------------
    Name:
    Title:

Address:____________________

With a copy to (which shall not be deemed notice for purposes of the Agreement):




69

[COMMON STOCKHOLDER SIGNATURE PAGE)

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

PHILLIP S. MAGIERA

By: /s/ Phillip S. Magiera
    ------------------------
    Name: Phillip S. Magiera
    Title: Shareholder

Address: 20 Strawberry Hill St. Dover, MA 02030

With a copy to (which shall not be deemed notice for purposes of the Agreement):




70

[COMMON STOCKHOLDER SIGNATURE PAGE]

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:

MEYTHALER INVESTORS, LLC

By: /s/ L. Charles Meythaler
    ------------------------
    Name: L. Charles Meythaler
    Title: Manager

ADDRESS: 399 Wahackme Road New Canaan, CT 06840

With a copy to (which shall not be deemed notice for purposes of the Agreement):




71

[COMMON STOCKHOLDER SIGNATURE PAGE)

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the date first above written.

NAME OF COMMON STOCKHOLDER:


By: /s/ Jack Barlow
    ------------------------
     Name: Jack Barlow
     Title: Stockholder

Address: 48 COVE St.


DUXBURY, MA 02332

With a copy to (which shall not be
deemed notice for purposes of the
Agreement);




72

Exhibit 10.6

GREENWORKS MOLECULAR INSIGHT PHARMACEUTICALS LEASE

1. DATE OF LEASE: June 19, 2003

2. LANDLORD: RayJoe Limited Partnership, a Massachusetts limited partnership, which expression shall include its heirs, executors, administrators, successors and assigns.

2A. LANDLORD'S ADDRESS: c/o Gravestar, Inc., One Broadway, Cambridge, MA 02142

3. TENANT: MOLECULAR INSIGHT PHARMACEUTICALS, INC., which expression shall include its heirs, executors, administrators, successors and assigns. Please note that Tenant was formerly known as Biostream, Inc.

3A. TENANT'S ADDRESS: Greenworks Building, 160 Second Street, Cambridge, Massachusetts 02142

4. DEMISED PREMISES: Landlord hereby leases to Tenant and Tenant hereby leases from Landlord, upon and subject to the terms and provisions of this Lease, Office Space containing approximately 3,064 rentable square feet of floor area, and Laboratory Space containing approximately 1,481 rentable square feet of floor area all as more fully shown on EXHIBIT E, attached hereto, located in the Greenworks Building, 160 Second Street, Cambridge, Massachusetts ("Property"), together with the right to use in common with others entitled thereto, the hallways, stairways and elevator (if any) necessary for access to the Demised Premises, and lavatories nearest thereto, if there is no lavatory within the Demised Premises.

4A. ACCEPTANCE OF DEMISED PREMISES: Tenant agrees that no representations or warranties respecting the condition of the Demised Premises and no promises to alter, repair or improve the Demised Premises have been made by Landlord, except as expressly provided for in this Lease. Tenant occupies office and laboratory space at the Greenworks Building under previous leases for office and laboratory spaces dated May 15, 1998, as amended, scheduled to terminate on June 30, 2003.

4B. LABORATORY RELOCATION WORK: Landlord and Tenant agree to relocate Tenant's Third Floor laboratory space located in Unit #28 and Second Floor laboratory space located in Unit #20 to the New Laboratory Space on the Second Floor, Units #14, #15 and #20 pursuant to the Biostream Relocation Project Scope Summary, Design Build Specification, Electrical Specification, Equipment List, and Cavanaugh Tocci and Plumbing Permit Letters shown on EXHIBIT B, and Plans D.1.1, A.1.1 and A.6.1, dated May 6, 2003 shown on EXHIBIT C, known in the aggregate as the Laboratory Relocation Work.

4C. LABORATORY RELOCATION SCHEDULE: Landlord and Tenant agree to the proposed Laboratory Relocation Schedule provided by Marc Truant and Associates, dated May 2, 2003 as shown on EXHIBIT D. Landlord and Tenant agree that the attached Laboratory Relocation Schedule is provided as the most current and viable estimate for the Laboratory Relocation Work. Landlord and Tenant agree that neither Landlord, Gravestar, Inc., Marc Truant and Associates as Landlord's Contractor, nor Jennifer Pinck as Landlord's

GREENWORKS MOLECULAR LEASE

-1-

Project Manager will assume any responsibility, financial or otherwise, for any delays in the Laboratory Relocation Schedule. Good faith efforts will be used to accommodate Tenant's needs in the event of unforeseen delays to the Laboratory Relocation Schedule. Biostream Inc, as Tenant is solely responsible for obtaining any and all permits and approvals for the operation of its laboratory(ies). Marc Truant and Associates, under contractual obligation with Landlord to provide pre-construction and construction services, is responsible for obtaining the local building permit required to execute the Laboratory Relocation Work and providing the local certificate of occupancy.

4D. LABORATORY RELOCATION COST: Landlord and Tenant agree to share the cost of the Laboratory Relocation Work as shown on EXHIBIT A, as follows:

1. The GMP Contract between Landlord and Marc Truant and Associates estimates the cost of the Laboratory Relocation Work at $327,426. The GMP Contract Summary includes an itemized list of additional work to be performed for the benefit of Tenant in the amount of $19,800, which falls outside of the scope of the original agreed-upon relocation work.

2. Landlord agrees to pay 66.7% (2/3) of the final cost of the Laboratory Relocation Work minus the additional work to be performed for the benefit of Tenant (($327,426 - $19,800) x 0.667). Thus, Landlord's contribution is estimated at $205,186.54.

3. Tenant agrees to pay 33.3% (1/3) of the final cost of the original agreed-upon relocation work plus the additional work to be performed for the benefit of Tenant (($307,626 x 0.333) + $19,800). Thus, Tenant's contribution is estimated at $122,239.46.

4. Landlord and Tenant agree to share any net cost savings that may accrue from the GMP Contract estimate proportionately. Thus, Landlord will receive 66.7% and Tenant will receive 33.3% of any resulting net cost savings.

5. LEASE TERM: Five (5) Lease Years.

5A. COMMENCEMENT DATE: July 1, 2003, subject to the following exception:
Pursuant to the New Laboratory Space on the Second Floor, if the Laboratory Relocation Work is completed prior to July 1, 2003 and Tenant is in physical possession of the New Laboratory Space on the Second Floor, all provisions of this Lease will apply to said New Laboratory Space on the Second Floor, except for the payment of rent, tax and operating expenses charges, which shall be governed by the provisions of the previous laboratory Lease (dated May 15, 1998, as amended), until June 30, 2003.

5B. TERMINATION DATE: June 30, 2008

6. PERMITTED USE: Tenant shall use the portions of the Demised Premises listed under Exhibit E, as Office Space solely and exclusively for the purpose of general offices and Laboratory Space solely and exclusively for the purpose of laboratory uses in conformance with the provisions of this Lease and in compliance with all applicable laws and regulations, including environmental laws, regulations, ordinances, orders and standards.

GREENWORKS MOLECULAR LEASE

-2-

7. RENT:

                             Dates:          Yearly Rent:   Monthly Rent:      Rent psf.
                             ------          ------------   -------------      ---------
Office Space:         7/1/03 to 6/30/08       $79,668.00      $6,639.00         $26.00
Laboratory Space:     7/1/03 to 6/30/08       $44,430.00      $3,702.50         $30.00

Tenant agrees to pay rent to Landlord in monthly installments, in advance, on the first day of each and every month during the Lease Term.

7A. PARKING CHARGE: Tenant agrees to pay $500.00 per month for the use of Five
(5) assigned parking space(s) within the Property. Landlord, at its sole discretion, reserves the right to increase its parking charges in the future to adjust to market conditions. Said increase becomes effective upon 30-day advance written notice to Tenant.

8. SECURITY DEPOSIT: A Security Deposit in the amount of $5,248.75 is currently held by Landlord under the previous Lease, as security for the punctual performance of each and every obligation under the Lease. The Security Deposit will be refunded to Tenant within sixty (60) days after the end of the Lease Term without interest, subject to the Tenant's satisfactory compliance with the terms of the Lease.

9. TAX CHARGE: Tenant shall pay to Landlord as additional rent hereunder, 21.5% of real estate taxes charged to the land and buildings of which the Demised Premises are a part of, for each Lease Year. Tenant's Tax charge of 14.5% in relation to the Office Space will be computed in excess of real estate taxes assessed for fiscal year 2003. Tenant's Tax Charge of 7% in relation to the Laboratory Space will be computed by multiplying the real estate taxes by 7%, without any initial tax base. Tenant shall make estimated monthly payments based upon reasonable projections made by Landlord, adjusted as needed. When the actual annual Tax liability is known, Landlord will promptly issue a written statement and refund any overpayment to Tenant or request Tenant to pay any underpayment balance. Tenant will pay any underpayment within 30 days after receipt of Landlord's statement.

10. OPERATING EXPENSES CHARGE: Tenant shall pay to Landlord as additional rent hereunder, 21.5% of all costs and expenses incurred by Landlord for each Lease Year in connection with the operation and maintenance of the land and buildings of which the Demised Premises are a part of. Tenant's Operating Expenses Charge of 14.5% in relation to the Office Space will be computed in excess of actual operating expenses for the calendar year 2003. Tenant's Operating Expenses Charge of 7% in relation to the Laboratory Space will be computed by multiplying the actual operating expenses by 7%, without any initial operating expenses base. Tenant shall make estimated monthly payments based upon reasonable projections made by Landlord, adjusted as needed. Within 90 days after the end of each calendar year during the Lease Term, Landlord will issue a written statement of actual annual operating expenses and refund any overpayment to Tenant or request Tenant to pay any underpayment balance. Tenant will pay any underpayment within 30 days after receipt of Landlord's statement.

11. LATE PAYMENTS: Any installment of Rent, additional rent and any other required payment not paid by Tenant within ten (10) days after the due date, shall bear a late charge until paid, equal to the lesser of 1.5% of the amount due for each month or the highest rate permitted by law.

GREENWORKS MOLECULAR LEASE

-3-

12. TENANT'S WORK: Upon the prior written consent of Landlord, Tenant shall, at its own expense, complete any work in and to the Demised Premises, in a good and workmanlike manner with materials of the highest quality, without interference to other work or businesses within the Greenworks Building, and in compliance with the terms of this Lease and all applicable laws, codes, ordinances and regulations. Landlord reserves the right, upon twenty-four (24) hours written notice to Tenant, to order Tenant to cease any and all Tenant's Work, if such work appears to cause disharmony, does not comply with union work rules applicable at the Property or interferes with the orderly operation of the other Tenants within the Property. Tenant's Work shall be performed only in accordance with applicable rules and regulations contained in the Greenworks Policy Manual and complete plans and specifications submitted to and approved in advance by Landlord.

13. TENANT COVENANTS & OBLIGATIONS: Tenant agrees to conform to the following provisions during the Lease Term:

(a) Tenant will conform and abide to the rules and regulations contained in the Greenworks Policy Manual, attached as EXHIBIT F. Landlord may, from time to time, amend the Greenworks Policy Manual, effective upon advance written notice to Tenant.

(b) Tenant will not make any alterations, improvements and/or additions to the Demised Premises without the advance written consent of Landlord, not to be unreasonably withheld. Any consent request will include such plans, specifications and details as Landlord may reasonably request.

(c) Tenant agrees to maintain the Demised Premises in a clean, safe and sanitary condition in accordance with all applicable federal, state and local laws, codes, ordinances and regulations. Tenant shall not permit or commit any waste.

(d) Tenant agrees to reimburse Landlord for the cost of replacement light bulbs and ballasts for fluorescent light fixtures within the Demised Premises.

(e) Tenant agrees to obtain prior written consent from Landlord before the installation of any signage visible from the outside of the Demised Premises.

(f) Tenant agrees not to perform or conduct any act or practice which may injure the Demised Premises or the property, or which is unlawful, improper, noisy, offensive or in any manner contrary to all applicable federal, state and local laws, codes, ordinances and regulations.

(g) Tenant agrees not to do any spray painting within the Demised Premises.

(h) Tenant agrees not to allow any mechanics' liens or other similar liens to be placed upon the Property, as a result of any work related to Tenant or its Demised Premises. Tenant will immediately cause any such liens to be released of record, at its sole expense.

(i) Tenant agrees to periodically shampoo and/or wax any carpeting and/or tiled flooring within the Demised Premises, as needed to maintain them in a clean and good operating condition.

14. LANDLORD'S RIGHT TO CHANGE THE PROPERTY: Landlord reserves the right (but not any obligation), from time to time, to alter, replace, construct, raze or otherwise modify any buildings, structures, improvements, systems, equipment, signs, or any other features within the Property, provided it does not permanently interfere with Tenant's right to use the Demised Premises.

GREENWORKS MOLECULAR LEASE

-4-

15. LANDLORD'S ACCESS: Landlord and its designees, shall have the right (but not any obligation) at all times, upon reasonable advance notice to Tenant, to enter upon the Demised Premises for the purpose of inspecting or performing routine maintenance or repairs, or for any other reasonable purpose, as determined by Landlord. No advance notice will be required in the event of emergencies.

16. LANDLORD'S MAINTENANCE & REPAIR OBLIGATIONS: Landlord agrees to keep in the same good order, condition and repair, as at present, less reasonable wear and tear, the roof, and the exterior face and structural portions of the Demised Premises. Landlord's obligations do not apply to damage caused by fire, other insured casualty or condemnation. Landlord shall not be responsible to repair or restore any damage caused by any act, omission or negligence of Tenant, its employees, agents, licensees, invitees or contractors, and Tenant shall bear the entire cost of such damage.

16A. CLEANING: Landlord agrees to empty customary office-type waste baskets on each business day, vacuum at least once per week and clean windows twice per year.

17. TENANT'S INSURANCE: Tenant agrees to pay for and maintain in full force during the Lease Term, a policy of comprehensive general liability insurance for personal injury and property damage on an occurrence basis, under which the Landlord or others as may be set out in written notice by landlord to Tenant, from time to time, are named as additional insureds. Each policy will be written by a company(ies) licensed to do business in Massachusetts and rated A-VIII or higher by A.M. Best's Rating Agency and will be non-cancelable without at least thirty (30) days' prior written notice to Landlord. The minimum limits of liability of such insurance shall be not less than $1,000,000, combined single limit for personal injury and death, and for property damage arising out of any one incident or disaster. Tenant shall provide Landlord with evidence of full coverage prior to Tenant's occupancy. Tenant will provide Landlord with a renewed Certificate of Insurance, thirty (30) days prior to the expiration of the current policy.

17A. TENANT'S PROPERTY INSURANCE: Tenant shall keep its fixtures, equipment, furniture and other personal property insured against loss or damage by fire with the usual extended coverage endorsements. Tenant assumes all risk of damage or loss to its own property arising from any cause, including theft.

17B. INCREASE IN INSURANCE RATES: Tenant agrees that it will not use, do or permit anything to be done in or upon the Demised Premises, which makes voidable or increases the rate of insurance on the property or any part thereof, and agrees to pay for any increase which may arise from such use or action.

17C. INDEMNIFICATION: Tenant agrees to indemnify and save harmless Landlord from and against all claims, actions or damages of whatever nature arising from any act, omission or negligence of the Tenant or Tenant's contractors, licensees, invitees, agents, servants or employees, on or about the Demised Premises or Property, during the Lease Term. Landlord agrees to indemnify and save harmless Tenant from and against all claims, actions or damages of whatever nature arising from any act, omission or negligence of the Landlord or Landlord's contractors, licensees, invitees, agents, servants or employees, on or about the Demised Premises, during the Lease Term.

GREENWORKS MOLECULAR LEASE

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18. UTILITIES: Landlord will provide and maintain all utilities serving the Demised Premises. Landlord reserves the right to place and maintain within the Demised Premises utility lines, pipes, fixtures, conduits and the like to serve the Demised Premises and other premises. Landlord shall not be liable to Tenant in damages or otherwise for any interruption, curtailment or suspension of any utility services. Tenant agrees to install, maintain and pay for all expenses associated with telephone and internet services.

19. ASSIGNMENT AND SUBLETTING: Tenant may not assign this Lease or sublet the Demised Premises without Landlord's prior written approval, not to be unreasonably withheld. Notwithstanding any consent, Tenant shall remain liable to Landlord for the payment of all rents and for the full performance of the terms of this Lease.

20. FIRE, CASUALTY AND EMINENT DOMAIN: Landlord may elect to terminate this Lease if the Demised Premises or the Property are substantially damaged by fire, other casualty or taken by condemnation or the right to eminent domain. Landlord's obligation to repair and restore in the event of partial damage by fire or other casualty is limited by the actual net amount of insurance proceeds. Tenant may elect to terminate this Lease if Landlord fails to give written notice within thirty (30) days after the event, of its intention to restore the Demised Premises or Landlord fails to restore the Demised Premises to a condition reasonably suited for its intended use within ninety (90) days after said event. Landlord will provide Tenant with a just and proportionate abatement of rent during the time the Demised Premises remain substantially unsuitable for their intended use. Landlord reserves and Tenant assigns to Landlord all rights which Tenant may have for damages or injury to the Demised Premises for any condemnations or takings by eminent domain.

21. SURRENDER OF PREMISES: Upon the expiration or sooner termination of this Lease, Tenant shall remove all Tenant's equipment, furniture and other personal property and surrender the Demised Premises in good and tenantable order and repair and in good operating condition, except for ordinary wear and tear. If Tenant fails to surrender the premises as required, Landlord may retain or dispose of Tenant's property or restore the premises, all at Tenant's expense. Any fixtures or other improvements installed by Landlord or Tenant remain Landlord's property and should not be removed by Tenant without Landlord's prior written consent.

21A. HOLDOVER BY TENANT: If Tenant remains in possession, after the expiration or sooner termination of this Lease without an executed renewal, this Lease becomes a month to month tenancy, at a monthly rental equal to two hundred (200%) percent of the rent payable during the last month of the Lease Term, subject to all other charges and terms contained in this Lease.

22. ENVIRONMENTAL MATTERS: Tenant agrees not to use, store, generate, manufacture, process or dispose of (or suffer or permit the use, storage, generating, manufacturing, processing or disposal of) oil, grease, chemical, hazardous, toxic or dangerous materials, substances or waste at or around the Demised Premises, Property or within any pipes, conduits, drains, mains or ducts or into any septic, sewer, drainage or other systems, except for materials used in Tenant's Laboratory Space solely and exclusively for the purpose of

GREENWORKS MOLECULAR LEASE

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laboratory uses in conformance with the provisions of this Lease and stored, used and disposed in strict compliance with all applicable laws and regulations, including environmental laws, regulations, ordinances, orders and standards. Tenant shall at all times comply with all applicable federal, state and local environmental laws, ordinances, orders or regulations now or hereafter affecting or applicable to the Demised Premises or Property. Tenant agrees to indemnify, defend, save and hold harmless Landlord from all claims, actions, liens, demands, costs, expenses, fines and judgments resulting from any spills or contamination of any kind caused by the acts or omissions of Tenant or its agents, employees, licensees, servants or contractors or any other violation of applicable environmental laws or this Provision of this Lease. Tenant agrees to pay all costs associated with the evaluation and remediation of any environmental matter and enforcement of this Environmental Provision including any reasonable engineering, consulting or legal fees and expenses. Landlord reserves the right to request Tenant to provide data, specifications and professional opinions in connection with any environmental concern related to Tenant or the Demised Premises.

23. SUBORDINATION: Tenant's rights under this Lease shall be subject and subordinate to any mortgages or deeds of trust or other instruments in the nature of a mortgage or lien on the Property and Tenant, upon request, shall promptly execute and deliver any written instrument necessary to show the subordination of this Lease.

24. EVENTS OF DEFAULT: In the event that: (a) Tenant shall default in the payment of rent or any other payments and such default shall continue for ten (10) days; or (b) Tenant shall default in the performance of any covenant or obligation under the terms of this Lease and such default shall not be corrected within fifteen (15) days after written notice thereof; or
(c) Tenant shall be declared bankrupt or insolvent according to law, or, if any assignment shall be made of Tenant's property for the benefit of creditors, then:

Landlord shall have the right at any time thereafter, while such default continues, to re-enter the Demised Premises and take complete possession, to declare the term of this Lease ended, and remove the Tenant's effects, without prejudice to any other remedies that might be otherwise used for unpaid rents or other defaults. Tenant shall indemnify Landlord against loss of rent and other payments that the Landlord may incur by reason of such termination during the remainder of the Lease Term.

In the event that Tenant shall default in the performance of any covenant or obligation under the terms of this Lease, excluding non-payment of rent or other charges, and such default shall not be corrected within fifteen
(15) days after written notice thereof, Landlord may (but is not obligated to do so) remedy such default at the expense of Tenant, to be paid as additional rent.

Failure by Landlord to complain of any action or non-action on the part of Tenant, no matter how long or frequent the same may continue, shall never be deemed to be a waiver by Landlord of any rights hereunder.

25. NO BROKERAGE: Landlord and Tenant warrant and represent that they have had no contact or dealings with any broker or any person or entity intending to claim a commission, in connection with this Lease or the Demised Premises.

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26. LIMITATION OF LIABILITY: Landlord shall not be liable to Tenant for any failure to perform its obligations under the terms of this Lease due to any cause beyond Landlord's reasonable control or caused by an act or neglect of Tenant or its servants, agents, employees or licensees. Landlord shall never be liable to Tenant for any indirect or consequential damages. No trustee, beneficiary, agent, employee, officer or partner of Landlord, nor any person, firm or entity having an interest in Landlord, shall ever be personally liable for any performance of Landlord's obligations under this Lease or any related judgments. Landlord's obligations are limited to the provisions of this Lease, during its ownership interest in the Property and are not binding upon any other assets held by Landlord.

27. NOTICES: Any notice required under the terms of this Lease shall be in writing and shall be hand-delivered or sent to Landlord at Landlord's Address and to Tenant at Tenant's Address. Notice shall be sent by registered or certified mail, return receipt requested, postage prepaid or by a recognized national courier that maintains records of delivery, such as Federal Express. Notice shall be deemed given when received, refused or tendered for delivery, provided it is correctly addressed.

28. AUTHORIZATION: The person signing this Lease on behalf of Tenant by virtue of his or her signature hereon personally represents and warrants to Landlord that Tenant has taken all necessary actions to authorize his or her signature hereon on behalf of such Tenant and that upon the signing and delivery hereof to the Landlord by him or her, this Lease will be binding upon Tenant.

WITNESS the execution hereof, under seal, in any number of counterpart copies, each which shall be deemed to be an original for all purposes as of the day and year first above written.

LANDLORD:                                 TENANT:

RAYJOE LIMITED PARTNERSHIP                MOLECULAR INSIGHT
By: KDO Real Estate Holdings, Inc.        PHARMACEUTICALS, INC.

By: /s/ Deborah A. Ciolfi                 By: /s/ John E. McCray
    ------------------------                  ------------------------
Deborah A. Ciolfi                         Name: John E. McCray
Treasurer, duly authorized.               Title: COO, duly authorized

                                          ATTEST By:

                                          /s/ Wendy Graham Coco
                                          ------------------------------
                                          Name: Wendy Graham Coco
                                          Title: Dir. Business Development &
                                                 Operations

                                                   GREENWORKS MOLECULAR LEASE

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FIRST AMENDMENT TO MOLECULAR INSIGHT PHARMACEUTICALS, INC., GREENWORKS
OFFICE LEASE

For good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, RayJoe Limited Partnership ("Landlord") and Molecular InSight Pharmaceuticals, Inc., ("Tenant"), confirm the following facts and their agreement as follows:

1. RECITALS. Landlord and Tenant are parties to a Lease Agreement dated June 19, 2003 ("Lease"). By mutual agreement, the parties hereby agree to lease two (2) additional office spaces until the expiration date of the Lease on June 30, 2008. The spaces are shown under attached EXHIBIT A.

The purpose of this writing is to set forth the entire agreement of the parties with respect thereto.

2. AMENDMENT. The Lease is hereby amended as follows:

A. ADDITIONAL SPACE #1: Tenant shall lease Unit # 18, the Pioneer Financial office space, as is, containing approximately 198 rsf, for a term of five
(5) years, commencing on September 1, 2003 until June 30, 2008 ("Additional Space #1"). Tenant agrees that Landlord has made no representations or warranties respecting the condition of the Additional Space #1.

B. FIXED RENT FOR ADDITIONAL SPACE #1: Provided Landlord has delivered the Additional Space #1, Tenant shall pay Fixed Rent ("Rent"), commencing on September 1, 2003, as follows:

    Dates:                     Yearly Rent:                  Monthly Rent:
    ------                     ------------                  -------------
9/1/03 - 6/30/08               $ 5,148.00                      $ 429.00

C. ADDITIONAL SPACE #1 AVAILABILITY CONTINGENCY: In the event that, Additional Space #1 is not delivered to Tenant as of December 1, 2003, the portions of this Amendment relating to Additional Space #1 will become void and unenforceable, unless Landlord and Tenant mutually agree to extend the delivery date for said unavailable space.

D. ADDITIONAL SPACE #2: Tenant shall lease Unit #16, currently occupied by Stella Tarnay, as is, containing approximately 170 rsf, for a term of five
(5) years, commencing on October 1, 2003 until June 30, 2008 ("Additional Space #2"). Tenant agrees that Landlord has made no representations or warranties respecting the condition of the Additional Space #2.

E. FIXED RENT FOR ADDITIONAL SPACE #2: Provided Landlord has delivered the Additional Space #2, Tenant shall pay Fixed Rent ("Rent"), commencing on October 1, 2003, as follows:

    Dates:                      Yearly Rent:                 Monthly Rent:
    ------                      ------------                 -------------
10/1/03 - 6/30/08               $ 4,416.00                    $ 368.00

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F. ADDITIONAL SPACE #2 AVAILABILITY CONTINGENCY: In the event that, Additional Space #2 is not delivered to Tenant as of December 1, 2003, the portions of this Amendment relating to Additional Space #2 will become void and unenforceable, unless Landlord and Tenant mutually agree to extend the delivery date for said unavailable space.

G. ADDITIONAL RENT ADJUSTMENT PERCENTAGES:

1. TAX CHARGE: Tenant shall pay 16 % of real estate taxes for the Property over the 2003 fiscal year tax base, as additional rent in relation to its office space.

2. OPERATING COST: Tenant shall pay 16 % of operating expenses for the Property over the 2003 calendar year base operating expenses, as additional rent in relation to its office space.

H. BASEMENT STORAGE: Tenant shall pay a charge of $110.00 per month for its lease of a wire cage in the basement, containing approximately 110 square feet for storage purposes only, commencing on July 1, 2003 until June 30, 2008. Landlord shall not be liable for any damage or losses incurred by Tenant due to theft, fire or any other cause. Tenant agrees to insure the personal property stored in said wire cage and assumes full responsibility for its security.

3. GENERAL. The individual signing this writing on behalf of Tenant personally represents and warrants to Landlord that all necessary corporate action authorizing the same has been duly taken and that upon the execution and delivery hereof, this writing shall be binding upon the Tenant and enforceable in accordance with its terms. Landlord and Tenant confirm that, as except as modified hereby, the Lease remains in full force and effect upon all the other terms and provisions.

EXECUTED as a sealed instrument_____________________________, 2003.

LANDLORD:                               TENANT:
RAYJOE LIMITED PARTNERSHIP              MOLECULAR INSIGHT
By: KDO Real Estate Holdings, Inc.      PHARMACEUTICALS, INC.

By: _____________________________       By: /s/ John E. McCray
    Deborah A. Ciolfi                       ------------------
    Treasurer, duly authorized          Name: John E. McCray
                                        Title: COO, as duly authorized.

                                        ATTEST By:

                                        /s/ John W. Babich
                                        --------------------
                                        Name: JOHN W. BABICH
                                        Title: PRESIDENT & CSO

                                        MOLECULAR INSIGHT FIRST AMENDMENT

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EXHIBIT A

[FLOOR PLAN]


Exhibit 10.7

EMPLOYMENT AGREEMENT
(for John W. Babich)

EMPLOYMENT AGREEMENT (this "Agreement") dated as of January 1, 2003 (the "Effective Date"), by and between Biostream, Inc., a Massachusetts corporation having its principal place of business at 160 Second Street, Cambridge, Massachusetts 02142 (the "Employer"), and John W. Babich (the "Employee").

WITNESSETH:

WHEREAS, the Employer is engaged in the business of developing and marketing imaging Pharmaceuticals which detect human disease; and

WHEREAS, the Employee possesses the experience necessary in administration and general and active supervision and direction of the daily operations of a biopharmaceutical business in order to fulfill the responsibilities as President and Chief Scientific Officer of the Employer; and

WHEREAS, the Employer desires to employ the Employee, and the Employee desires to be employed by the Employer, all in accordance with the terms and provisions of this Agreement.

NOW, THEREFORE, in consideration of the covenants and promises hereinafter contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Employer and the Employee represent, covenant and agree as follows:

1. Employment. The Employer hereby employs the Employee to serve as President and Chief Scientific Officer of the Employer in accordance with the terms and provisions of this Agreement, and the Employee hereby accepts such employment with the Employer. Employee also shall serve as a member of the Board of Directors of the Employer.

2. Term. The term of this Agreement shall commence on the Effective Date and shall continue until this Agreement is terminated as hereinafter provided.

3. Compensation. As compensation for all services rendered by the Employee to the Employer pursuant to this Agreement, the Employer shall pay to the Employee the following amounts during the term of this Agreement:

(a) Base Compensation. The Employer shall pay to the Employee base compensation at no less than the rate set forth on Schedule A attached hereto and herein incorporated by reference (the "Base Compensation"). The Base Compensation shall be payable pursuant to the Employer's standard payroll practices, except as otherwise noted on Schedule A. The Base Compensation shall be reviewed by the compensation committee of the Board of the Employer annually and increases in the Base Compensation, if any, shall be evidenced by the updating and initialing of Schedule A by both parties hereto.


(b) Incentive Bonus. In addition to the Base Compensation, the Employee shall be eligible to receive an annual fiscal year incentive bonus with a maximum annual amount equal to seventy-five percent (75%) of the then current Base Compensation (the "Incentive Bonus"). Payment of the Incentive Bonus shall be subject to the discretion of the Board and will be based upon accomplishment of goals provided to the Employee by the CEO from time to time and based upon scientific progress and achievement of specific corporate milestones. The Board may elect to award the Incentive Bonus to the Employee in cash or in the Employer's capital stock (at its then-current fair market value), but a capital stock bonus requires the consent of the Employee.

4. Vacation and Employee Benefits.

(a) Vacation. The Employee shall be entitled to an annual paid vacation equal to four weeks annually. Vacation shall be taken at such times so as not to interfere with the proper operation of the Employer's business.

(b) Benefits Generally. The Employee shall be entitled to receive and participate in such employee benefits as the Employer shall from time to time determine to provide to its executives generally. At a minimum, the Employee shall receive medical and dental insurance at the Employer's expense.

(c) Indemnification Rights. The Employee shall be entitled to indemnification, including advance reimbursement of expenses, to the fullest extent permitted by applicable law, and shall be entitled to receive an indemnification agreement with terms equivalent to any indemnification agreement that the Employer executes with any of its officers or directors.

(d) Registration Rights. The Employee shall be entitled to the benefit of any so-called "piggy-back" registration rights and related provisions that the Employer has granted or grants to any third party on the same basis as the most favorable provisions received by any such third party.

(e) Participation Rights. The Employee shall be entitled to rights equivalent to the Employer's outside investors with respect to rights to purchase additional equity securities issued by the Employer in order to maintain the Employee's percentage interest in the Employer's equity securities.

5. Stock Incentives.

(a) Options. Pursuant to the provisions of the Company's 1997 Stock Option Plan, as may be amended from time to time (the "Plan"), and subject to the vesting provisions described below the Company hereby grants to the Employee an option to purchase 1,825,000 shares of its Common Stock ($.01 par value) (the "Optioned Shares") at a price of $0.10 per share, in accordance with and subject to all the terms and conditions of the Plan and subject to the terms and conditions hereinafter set forth. Nothing in this section refers to or impinges upon

2

shares currently held by or options (either vested or unvested) previously granted to the Employee.

(b) Vesting. 20% of the options shall be vested upon Board approval and the remainder shall be "unvested options." An additional 5% of the options shall vest on each quarterly (three-month) anniversary of the Effective Date, provided that the Employee is still employed by the Employer on such date or is then receiving a Severance Package (as defined in Section 15 below). In the event of a Change of Control (as defined below), all of the unvested options immediately shall vest, provided that the Employee is still employed by the Employer on the date of such Change of Control, or is then receiving a Severance Package.

(c) Change of Control. For purposes of this Agreement "Change of Control" shall mean the occurrence of one or more of the following events:

(i) any "person" (as such term is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) becomes a "beneficial owner" (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the Employer, any trustee or other fiduciary holding securities under an employee benefit plan of the Employer, or any corporation owned, directly or indirectly, by the stockholders of the Employer, in substantially the same proportions as their ownership of stock of the Employer), or any or group of persons acting in concert becomes a beneficial owner, directly or indirectly, of securities of the Employer, representing more than fifty percent (50%) of the combined voting power or fully diluted equity interest of the Employer's then outstanding equity securities, except as a result of a financing transaction where all proceeds are received directly by the Company that is not intended as a sale of the business of the Employer; or

(ii) the stockholders of the Employer approve a merger or consolidation of the Employer with any other corporation or other entity, other than (A) a merger or consolidation which would result in the equity securities of the Employer outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into equity securities of the surviving entity) fifty percent (50%) or more of the outstanding equity interest of the Employer or such surviving entity outstanding immediately after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Employer (or similar transaction) in which no "person" (as hereinabove defined) other than Employee acquires more than fifty percent (50%) of the equity interest of the Employer's then outstanding securities; or

(iii) the stockholders of the Employer approve a plan of complete liquidation of the Employer or an agreement for the sale or disposition by the Employer of all or substantially all of the Employer's assets.

6. Description of Duties. During the term of this Agreement, the Employee shall be the President and Chief Scientific Officer of the Employer and shall:

(a) Devote on a full time basis all necessary time, best efforts, professional skills, attention and energies to the fulfillment of the duties customarily associated with such

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position and the accomplishment of the goals provided by the CEO of the Employer to the Employee from time to time; and

(b) Act in accordance herewith, and in all accounts be responsible and responsive to, the Board of Directors and the CEO of Employer.

7. General Services. During the term of this Agreement, the Employee shall:

(a) Observe the Employer's policies and standards of conduct, as well as customary standards of business conduct, including any standards prescribed by law or regulation;

(b) Perform his duties hereunder in a manner that preserves and protects the Employer's business reputation; and

(c) Do all things and render such services as may be necessary or beneficial in carrying out any of the foregoing.

8. Non-Disclosure of Proprietary or Confidential Information and Confidential Communications. For the purposes of this Section 8, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee recognizes and acknowledges that the marketing plans and business strategy, the names and addresses of the Employer's customers, the particular needs and application of such customers for diagnostic imaging techniques, the names and addresses of the Employer's suppliers, the Employer's purchasing history with its suppliers, the names and other pertinent data concerning the persons employed by the Employer's suppliers who are responsible for supplying the Employer with products and services, the Employer's proprietary computer software programs, trade secrets and any other confidential and proprietary information concerning the business or affairs of the Employer (including but not limited to marketing and business plans and strategies, research protocols, procedures data, results, and cost information) (hereinafter collectively referred to as the Confidential Information) constitute a valuable, proprietary, special and unique asset of the Employer's business. The Employee further recognizes and acknowledges that any communications, whether written, oral or otherwise, that the Employer or any of the Employer's employees has with the Employer's existing or prospective customers and clients and affiliated research institutions and scientists are extremely confidential (hereinafter the "Confidential Communications"). The term Confidential Information shall exclude any information that has been made public through no fault of the Employee.

The Employee shall not, for any reason whatsoever, during or after the termination of his employment with the Employer, use, disclose or allow access to, for his own benefit or for that of another, the Confidential Information or the Confidential Communications (or any part thereof) to any person, firm, corporation, association or other entity for any reason or for any purpose whatsoever.

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In the event of a breach or threatened breach by the Employee of the provisions of this Section, the Employer shall be entitled to an injunction restraining the Employee from so using, disclosing or allowing access to, in whole or in part, the Confidential Information and the Confidential Communications or from rendering any services to any person, firm, corporation, association or other entity to whom the Confidential Information or the Confidential Communications, in whole or in part, have been disclosed or are threatened to be disclosed. Nothing herein shall be construed as prohibiting the Employer from pursuing any other remedies available to the Employer for such breach or threatened breach, including, but not limited to, the recovery of damages and reasonable attorneys' fees from the Employee.

Upon termination of this Agreement by either party for any reason, the Employee shall return to the Employer any of the Confidential Information, Confidential Communications, charts, company literature, reports, Employer credit cards or other proprietary materials of the Employer then in the Employee's possession and all other materials of the Employer which the Board of Directors of the Employer requests the Employee to so return.

This Section shall in all respects survive any termination of this Agreement and shall remain in full force and effect thereafter. In the event that any provision of this Section 8 shall conflict with any term or condition of any other confidentiality agreement between the Employer and the Employee, then the more restrictive provision shall be deemed to apply in order to accomplish the purposes of this Section 8 and such other agreements, that being to protect the Employer's Confidential Information and Confidential Communications.

In the event of the Employee's breach of this Section 8, the Employee shall immediately and irrevocably forfeit future payments under the Severance Package as hereinafter defined in Section 15. Nothing in this paragraph shall be construed to limit or cap the Employer's damages in the event of a breach of this Section 8.

9. Covenant Not to Compete; Non-solicitation of Employees and Customers. For the purposes of this Section 9, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee agrees that while employed by the Employer and for a continuous period of one (1) year following the date of the termination of his employment with the Employer either voluntarily without "Good Reason" or involuntarily by the Company for "cause" (the "Restricted Period"), he shall not (without the express prior written consent of the Board of Directors of the Employer), directly or indirectly, compete with the Employer. In construing the foregoing prohibition, the Employee shall be deemed to be competing with the Employer if he shall become self-employed in, or accept employment with, consult with, render services to or become associated with, own, manage, operate, join, control, or participate in the ownership, management, operation, or control of, or be connected in any material manner with, or directly or indirectly enter into the employment of, or make a substantial investment in, any corporation, partnership, proprietorship or other type of business organization or entity which engages in, any business (a "Competing Business") involving the sale, distribution, development or research concerning diagnostic imaging of the human cardio-vascular system or other lines of the Employer which directly and materially competes with the product lines in or with which the

5

Employer is then currently involved. An academic appointment shall be deemed not to be a conflict under the terms of this section.

The Employee further agrees that, during his employment with the Employer and during the Restricted Period, he shall not solicit any of the Employer's employees, existing customers or prospective customers (of which the Employee is then currently aware), affiliated research institutions or scientists, on behalf of himself or any Competing Business.

This Section 9 shall in all respects survive any termination of this Agreement and shall remain in full force and effect during the Restricted Period.

In the event of the Employee's breach of this Section 9 during the Restricted Period, the Employee shall immediately and irrevocably forfeit future payments to the Employee under the Severance Package as hereinafter defined in
Section 15.

10. Assignment of Rights. Any and all information, data, inventions, discoveries, materials, notebooks and other work product which the Employee conceives, develops or acquires during his employment with the Employer, which directly or indirectly relates to work performed for the Employer, shall be the sole and exclusive property of the Employer. The Employee shall promptly execute any and all documents necessary and take such further actions as the Employer may deem necessary to assign any and all of the Employee's right, title and interest in such property to the Employer.

11. Intellectual Property. For the purposes of this Section 11, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. During the Employee's employment at the Employer, the Employee shall promptly assist with and execute any and all applications, assignments or other documents which an officer or director of the Employer shall deem necessary or useful in order to obtain and maintain patent, trademark or other intellectual property protection for the Employer's products or services. After the termination date of his employment with the Employer, the Employee shall use reasonable efforts to assist the Employer on intellectual property matters as they relate to his employment, and the Employer shall reasonably compensate the Executive for his time and expense.

12. Documents, Records, etc. All documents, records, data, apparatus, equipment and other physical property, whether or not pertaining to Confidential Information, which are furnished to the Employee by the Employer or are produced by the Employee in connection with the Employee's employment will be and remain the sole property of the Employer. The Employee will return to the Employer all such materials and property as and when requested by the Employer. In any event, and whether or not the Employer so specifically requests, the Employee will return all such materials and property immediately upon termination of the Employee's employment for any reason. The Employee will not retain any such material or property or any copies thereof after such termination.

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13. Third-Party Agreements and Rights. The Employee hereby confirms that he is not bound by the terms of any agreement with any previous employer or other party which restricts in any way the Employee's use or disclosure of information or the Employee's engagement in any business. The Employee represents to the Employer that the Employee's execution of this Agreement, the Employee's employment with the Employer and the performance of the Employee's proposed duties for the Employer will not violate any obligations the Employee may have to any such previous employer or other party. In the Employee's work for the Employer, the Employee will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Employee will not bring to the premises of the Employer any copies or other tangible embodiments of nonpublic information belonging to or obtained from any such previous employer or other party.

14. Restricted Activities. During the term of this Agreement, the Employee shall not engage in any business activities or ventures outside of the business activities of the Employer without the express prior written consent of the Employer's Board; provided, however, that nothing in this Agreement shall be construed as preventing the Employee from:

(a) investing the Employee's assets in any company or other entity in a manner not prohibited by Section 9 and in such form or manner as shall not require any material activities on the Employee's part in connection with the operations or affairs of the companies or other entities in which such investments are made; or

(b) engaging in religious, charitable or other community or non-profit activities that do not impair the Employee's ability to fulfill the Employee's duties and responsibilities under this Agreement.

15. Termination.

A. Termination Without Cause.

(a) Notwithstanding anything herein to the contrary, this Agreement may be terminated by either the Employer (by act of its Board) or the Employee, at any time, without cause; provided, however, that the party desirous of terminating this Agreement shall give the other party prior written notice of such termination. In either event, the Employer may determine the Employee's final day of employment hereunder. The date specified in any notice of termination as the Employee's final day of employment shall be referred to herein as the Termination Date.

(b) In the event that the Employer (by act of its Board) terminates this Agreement without cause pursuant to this subsection (A) of
Section 15, or the Employee voluntarily resigns for Good Reason (defined below), then the Employee shall be entitled to receive severance pay equal the Base Compensation rate as of the Termination Date in equal monthly installments for a period of twelve (12) months (the "Post-Termination Period") from the Termination Date (the "Severance Package"). The Employer also agrees to make available to the Employee, as part of the Severance Package, continuation of group health plan benefits to the extent authorized by and consistent with 29 U.S.C. Section 1161 et seq. (commonly known as

7

"COBRA"), and any other benefits the Employee is receiving as of the Termination Date with the cost of the regular premium for such benefits shared in the same relative proportion by the Employer and the Employee as in effect on the Termination Date.

(c) For purposes of this Agreement, "Good Reason" shall mean:

(i) a reduction of the Employee's salary or insurance benefits other than a reduction approved by the Employee in writing; or

(ii) a significant change in the Employee's title, responsibilities and/or duties which constitutes, when compared to the Employee's title, responsibilities and/or duties as of the Effective Date, a demotion; or

(iii) the relocation of the offices at which the Employee is principally employed as of the Effective Date to a location more than fifty (50) miles from such office, which relocation is not approved by the Employee.

(d) In the event of the Employee's voluntary termination, then the Employee shall, at the request of the CEO of the Employer, continue as an employee of the Employer for an additional thirty (30) day period after the Termination Date for the purpose of assisting the Employer in locating and training a suitable replacement for the Employee. During such additional period, the Employee shall be entitled to full compensation and benefits and the Employee shall continue to be bound by all of the terms contained herein. Any such extended term shall extend the Post-Termination Period by an equal number of days.

B. Termination With Cause.

(a) The Employer (by act of its Board or CEO) may terminate this Agreement immediately for "cause" by giving written notice to the Employee. As used herein, the term "cause" shall mean the Employee's: (i) addiction to illegal drugs; (ii) willful failure or refusal to perform his duties hereunder after written notice from the CEO and an opportunity to cure; (iii) knowing acts of dishonesty which materially adversely affect the Employer; (iv) indictment for a felony or crime involving moral turpitude, fraud, embezzlement or misrepresentation. In the event that this Agreement is terminated pursuant to this subsection (B), the Employee forfeits and shall not be entitled to the Severance Package, or other benefits or bonus of any kind whatsoever for any period after the Termination Date set forth in the notice given by the Employer to the Employee.

C. Disability.

(a) If the Employee shall be disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions under this Agreement, the Employer may remove the Employee from any responsibilities and/or reassign the Employee to another position with the Employer during the period of such disability. If the period of disability extends for more than six (6) months, the Employer may terminate the Employee's employment without further liability on the part of the Employer, except that the Employee shall

8

be entitled to the Severance Package. The Employer may elect, at its sole discretion, to purchase a disability insurance package for the Employee. In the event that the Employer so elects to purchase a disability insurance package and the Employee subsequently becomes entitled to payments of the disability insurance benefit, any payments pursuant to the Severance Package, as defined in this Section 15, or payments of salary by the Employer will be reduced by the amount of the disability insurance benefit payments received by the Employee.

(b) If any question shall arise as to whether during any period the Employee is disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions, the Employee may, and at the request of the Employer shall, submit to the Employer a certification in reasonable detail by a physician selected by the Employer, to whom the Employee or the Employee's guardian has no reasonable objection, as to whether the Employee is so disabled or how long such disability is expected to continue, and such certification shall, for the purposes of this Agreement, be conclusive of the issue. The Employee shall cooperate with any reasonable request of the physician in connection with such certification. If such question shall arise and the Employee shall fail to submit such certification, the Employer's determination of such issue shall be binding on the Employee. Nothing in this Section 15(c) shall be construed to waive the Employee's rights, if any, under existing law including, without limitation, the Family and Medical Leave Act of 1993, 29 U.S.C. 2601, et seq. and the Americans with Disabilities Act, 42 U.S.C. 12101 et seq.

D. Death or Retirement. The Employee's employment under this Agreement will be deemed to have terminated without further liability on the part of the Employer if the Employee dies or retires.

E. Certain Termination Benefits. Unless otherwise specifically provided in this Agreement or otherwise required by law, all compensation and benefits payable to the Employee under this Agreement shall terminate on the date of termination of the Employee's employment under this Agreement.

F. No Right to Continuing Employment. The Employee agrees that nothing contained in this Agreement shall be construed to give the Employee a right to continuing employment beyond the Termination Date.

16. Litigation and Regulatory Cooperation. During and after the Employee's employment, the Employee shall cooperate fully with the Employer in the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Employer which relate to events or occurrences that transpired while the Employee was employed by the Employer. The Employee's full cooperation in connection with such claims or actions shall include, but not be limited to, being available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Employer at mutually convenient times. During and after the Employee's employment, the Employee also shall cooperate fully with the Employer in connection with any investigation or review of any federal, state or local regulatory authority as any such investigation or review relates to events or occurrences that transpired while the Employee was employed by the Employer. The Employer

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shall reimburse the Employee for any reasonable out-of-pocket expenses incurred in connection with the Employee's performance of obligations pursuant to this
Section 16.

17. Injunction. The Employee agrees that it would be difficult to measure any damages caused to the Employer which might result from any breach by the Employee of the promises set forth in Section 8, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Employee agrees that if the Employee breaches, or proposes to breach, any portion of this Agreement, the Employer shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate preliminary equitable relief to restrain any such breach without showing or proving any actual damage to the Employer.

18. No Assignment. The Employee acknowledges that the services to be rendered by him pursuant to this Agreement are unique. Accordingly, the Employee shall not assign any of his rights or delegate any of his duties or obligations under this Agreement.

19. Severability. Subject only to the reformation of time, geographical and occupational limitations as set forth in Section 20 hereof, all of the terms and provisions contained in this Agreement are severable and, in the event that any portion or provision of this Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be deemed unenforceable or invalid by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or provision in circumstances other than those as to which it is so declared unenforceable or invalid, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

20. Reformation of Time Geographical and Occupational Limitations. In the event that any provision in this Agreement is held to be unenforceable by a court of competent jurisdiction because it exceeds the maximum time, geographical or occupational limitations permitted by applicable law, then such provision(s) shall be and hereby are reformed to the maximum time, geographical and occupational limitations as may be permitted by applicable law.

21. Specific Performance. Both parties recognize that the services to be rendered under this Agreement by the Employee are special, unique and of an extraordinary character, and that in the event of breach by the Employee of the terms or conditions of this Agreement to be performed by him, the Employer shall be entitled, if it so elects, to institute and prosecute proceedings in any court of competent jurisdiction, either at law or in equity, to obtain damages for any breach of this Agreement to enforce the specific performance thereof by the Employee, or to enjoin the Employee from engaging in such activity, but nothing contained herein shall be construed to prevent such other remedy in the courts, in case of any breach of this Agreement by the Employee, as the Employer may elect to invoke.

22. Massachusetts Law: Choice of Forum. This Agreement shall be governed, construed and interpreted by, and in accordance with, the laws of the Commonwealth of Massachusetts, without reference to its principles of conflicts of laws. Any actions concerning

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enforcement of this Agreement or in any way relating to the subject matter of this Agreement shall be litigated only in Massachusetts state or federal courts of proper jurisdiction and venue. Each party hereto expressly agrees to submit to such jurisdiction and venue for the purposes of this Agreement. Notwithstanding the foregoing, the Employer may seek to enforce the Employee's covenants described in Sections 6,7, 8 and 9 hereof in any jurisdiction and venue in which the Employee then resides, breaches or threatens to breach such covenants.

23. Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto, and replaces all prior agreements, promises, representations and understandings between the Employer and the Employee whatsoever concerning the limited subject matter hereof (other than the Stock Plan and any related Stock Option Agreement entered into between the Employer and the Employee). There are no other agreements, conditions or representations, oral or written, express or implied, which form the basis for this Agreement.

24. Assignment; Successors and Assigns, Etc. Neither the Employer nor the Employee may make any assignment of this Agreement or any interest herein, by operation of law or otherwise, without the prior written consent of the other party; provided, however, that the Employer may assign its rights under this Agreement without the consent of the Employee in the event that the Employer shall effect a reorganization, consolidate with or merge into any other corporation, partnership, organization or other entity, or transfer all or substantially all of its properties or assets to any other corporation, partnership, organization or other entity. This Agreement shall inure to the benefit of and be binding upon the Employer and the Employee, their respective successors, executors, administrators, heirs and permitted assigns.

25. Modification. No waiver or modification of this Agreement or of any covenant, condition, or limitation contained herein shall be valid unless in a writing of subsequent date hereto and duly executed by the party to be charged therewith and no evidence of any waiver or modification shall be offered or received in evidence in any proceeding, arbitration, or litigation between the parties hereto arising out of or affecting this Agreement, or the rights or obligations of the parties hereunder, unless such waiver or modification is in writing, duly executed as aforesaid. The parties further agree that the provisions of this Section may not be waived except as herein set forth.

26. Section Headings. The section headings contained in this Agreement are for convenience only, and shall in no manner be construed as part of this Agreement.

27. Waiver of Breach. The waiver by either party of a breach or violation of any provision of this Agreement shall not operate as, or be construed to be, a waiver of any subsequent breach thereof.

28. Notices. Any and all notices required or permitted to be given under this Agreement shall be sufficient if furnished in writing, sent by certified or registered mail, return receipt requested to the party's address set forth in the Prologue of this Agreement, or to such other address as such party may specify in writing.

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29. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document.

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IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year here above first written.

BIOSTREAM, INC.

By: /s/ David S. Barlow
    --------------------
Name: David S. Barlow
Title: Chairman & CEO

/s/ John W. Babich
------------------------
John W. Babich

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SCHEDULE A
(As Amended from time to time pursuant to Paragraph 3(a))

Base Compensation

Annual Rate of Base
   Compensation          Agreed to by Employee         Agreed to by Employer
-------------------      ---------------------         ---------------------
$ 200,000.00

(Must be initialed by both parties each time amended to be effective.)

Exhibit A - Incentive Stock Option Grant

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Exhibit 10.8

EMPLOYMENT AGREEMENT
(for David S. Barlow)

THIS EMPLOYMENT AGREEMENT (this "Agreement") is dated as of February 7, 2003 (the "Effective Date"), by and between Biostream, Inc., a Massachusetts corporation having its principal place of business at 160 Second Street, Cambridge, Massachusetts 02142 (the "Employer"), and David S. Barlow (the "Employee").

WITNESSETH:

WHEREAS, the Employer is engaged in the business of developing and marketing imaging pharmaceuticals which detect human disease; and

WHEREAS, the Employee possesses the experience necessary in administration and general and active supervision and direction of the daily operations of a biopharmaceutical business in order to fulfill the responsibilities as Chairman and Chief Executive Officer of the Employer; and

WHEREAS, the Employer desires to employ the Employee, and the Employee desires to be employed by the Employer, all in accordance with the terms and provisions of this Agreement.

NOW, THEREFORE, in consideration of the covenants and promises hereinafter contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Employer and the Employee represent, covenant and agree as follows:

1. Employment. The Employer hereby employs the Employee to serve as Chairman and Chief Executive Officer of the Employer in accordance with the terms and provisions of this Agreement, and the Employee hereby accepts such employment with the Employer. Employee also shall serve as a member of the Board of Directors of the Employer.

2. Term. The term of this Agreement shall commence on the Effective Date and shall continue until this Agreement is terminated as hereinafter provided.

3. Compensation. As compensation for all services rendered by the Employee to the Employer pursuant to this Agreement, the Employer shall pay to the Employee the following amounts during the term of this Agreement:

(a) Base Compensation. The Employer shall pay to the Employee base compensation at no less than the rate set forth on Schedule A attached hereto and herein incorporated by reference (the "Base Compensation"). The Base Compensation shall be payable pursuant to the Employer's standard payroll practices, except as otherwise noted on Schedule A. The Base Compensation shall be reviewed by the compensation committee of the Board of the Employer annually and increases in the Base Compensation, if any, shall be evidenced by the updating and initialing of Schedule A by both parties hereto.


(b) Incentive Bonus. In addition to the Base Compensation, the Employee shall be eligible to receive an annual fiscal year incentive bonus with a maximum annual amount equal to seventy-five percent (75%) of the then current Base Compensation (the "Incentive Bonus"). Payment of the Incentive Bonus shall be subject to the discretion of the Board and will be based upon accomplishment of goals provided to the Employee by the Board from time to time and based upon revenue growth, profitability and achievement of specific corporate milestones. The Board may elect to award the Incentive Bonus to the Employee in cash or in the Employer's capital stock (at its then-current fair market value), but a capital stock bonus requires the consent of the Employee.

(c) Signing Bonus. Upon execution of this Agreement, the Employee shall be entitled to receive from the Company an amount equal to $21,153.85 (the "Signing Bonus"). The Signing Bonus shall be paid in one lump sum on the date that the Company commences payment of Base Compensation to the Employee pursuant to Schedule A attached hereto, such bonus payment to be made subject to the Employer's standard payroll practices.

4. Vacation and Employee Benefits.

(a) Vacation. The Employee shall be entitled to an annual paid vacation equal to four weeks annually. Vacation shall be taken at such times so as not to interfere with the proper operation of the Employer's business.

(b) Benefits Generally. The Employee shall be entitled to receive and participate in such employee benefits as the Employer shall from time to time determine to provide to its executives generally. At a minimum, the Employee shall receive medical and dental insurance at the Employer's expense.

(c) Indemnification Rights. The Employee shall be entitled to indemnification, including advance reimbursement of expenses, to the fullest extent permitted by applicable law, and shall be entitled to receive an indemnification agreement with terms equivalent to any indemnification agreement that the Employer executes with any of its officers or directors.

(d) Registration Rights. The Employee shall be entitled to the benefit of any so-called "piggy-back" registration rights and related provisions that the Employer has granted or grants to any third party on the same basis as the most favorable provisions received by any such third party.

(e) Participation Rights. The Employee shall be entitled to rights equivalent to the Employer's outside investors with respect to rights to purchase additional equity securities issued by the Employer in order to maintain the Employee's percentage interest in the Employer's equity securities.

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5. Stock Incentives.

(a) Options. Subject to the vesting provisions described below, the Employee shall be entitled to purchase, simultaneously with the execution of this Agreement, 3,285,000 shares (the "Restricted Shares") of the Employer's common stock at a per share price equal to $0.10 per share, which is the fair market value of such common stock as most recently determined by the Board for purposes of incentive stock option grants. The Employee shall pay the par value of the restricted shares ($.01 per share) in cash and shall also execute a 50% recourse, non-interest bearing, balloon promissory note for the balance of the purchase price in the form attached as Exhibit A hereto. The Company represents to the Employee that the current fully diluted capitalization of the Company is accurately set forth in the spreadsheet set forth as Exhibit B hereto, and that the Company is under no obligation, actual or contingent, to issue any securities other than those set forth in Exhibit B, including the notes thereto.

(b) Vesting. 20% of the restricted shares shall be vested upon purchase and the remainder shall be "unvested shares." An additional 5% of the restricted shares shall vest on each quarterly (three-month) anniversary of the Effective Date, provided that the Employee is still employed by the Employer on such date or is then receiving a Severance Package (as defined in Section 15 below). In the event of a Change of Control (as defined below), all of the unvested restricted shares immediately shall vest, provided that the Employee is still employed by the Employer on the date of such Change of Control, or is then receiving a Severance Package.

(c) Restrictions. All restricted shares shall be subject to the terms and conditions of a restricted stock agreement in the form attached hereto as Exhibit C.

(d) Change of Control. For purposes of this Agreement "Change of Control" shall mean the occurrence of one or more of the following events:

(i) any "person" (as such term is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) becomes a "beneficial owner" (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the Employer, any trustee or other fiduciary holding securities under an employee benefit plan of the Employer, or any corporation owned, directly or indirectly, by the stockholders of the Employer, in substantially the same proportions as their ownership of stock of the Employer), or any or group of persons acting in concert becomes a beneficial owner, directly or indirectly, of securities of the Employer, representing more than fifty percent (50%) of the combined voting power or fully diluted equity interest of the Employer's then outstanding equity securities, except as a result of a financing transaction where all proceeds are received directly by the Company that is not intended as a sale of the business of the Employer; or

(ii) the stockholders of the Employer approve a merger or consolidation of the Employer with any other corporation or other entity, other than (A) a merger or consolidation which would result in the equity securities of the Employer outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into equity securities of the

3

surviving entity) fifty percent (50%) or more of the outstanding equity interest of the Employer or such surviving entity outstanding immediately after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Employer (or similar transaction) in which no "person" (as hereinabove defined) other than Employee acquires more than fifty percent (50%) of the equity interest of the Employer's then outstanding securities; or

(iii) the stockholders of the Employer approve a plan of complete liquidation of the Employer or an agreement for the sale or disposition by the Employer of all or substantially all of the Employer's assets.

6. Description of Duties. During the term of this Agreement, the Employee shall be the Chairman and Chief Executive Officer of the Employer and shall:

(a) Devote on a full time basis all necessary time, best efforts, professional skills, attention and energies to the fulfillment of the duties customarily associated with such position and the accomplishment of the goals provided by the Board of Directors of the Employer to the Employee from time to time; and

(b) Act in accordance herewith, and in all accounts be responsible and responsive to, the Board of Directors of Employer.

7. General Services. During the term of this Agreement, the Employee shall:

(a) Observe the Employer's policies and standards of conduct, as well as customary standards of business conduct, including any standards prescribed by law or regulation;

(b) Perform his duties hereunder in a manner that preserves and protects the Employer's business reputation; and

(c) Do all things and render such services as may be necessary or beneficial in carrying out any of the foregoing.

8. Non-Disclosure of Proprietary or Confidential Information and Confidential Communications. For the purposes of this Section 8, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee recognizes and acknowledges that the marketing plans and business strategy, the names and addresses of the Employer's customers, the particular needs and application of such customers for diagnostic imaging techniques, the names and addresses of the Employer's suppliers, the Employer's purchasing history with its suppliers, the names and other pertinent data concerning the persons employed by the Employer's suppliers who are responsible for supplying the Employer with products and services, the Employer's proprietary computer software programs, trade secrets and any other confidential and proprietary information concerning the business or affairs of the Employer (including but not limited to marketing and business plans and strategies, research protocols,

4

procedures data, results, and cost information) (hereinafter collectively referred to as the Confidential Information) constitute a valuable, proprietary, special and unique asset of the Employer's business. The Employee further recognizes and acknowledges that any communications, whether written, oral or otherwise, that the Employer or any of the Employer's employees has with the Employer's existing or prospective customers and clients and affiliated research institutions and scientists are extremely confidential (hereinafter the "Confidential Communications"). The term Confidential Information shall exclude any information that has been made public through no fault of the Employee.

The Employee shall not, for any reason whatsoever, during or after the termination of his employment with the Employer, use, disclose or allow access to, for his own benefit or for that of another, the Confidential Information or the Confidential Communications (or any part thereof) to any person, firm, corporation, association or other entity for any reason or for any purpose whatsoever.

In the event of a breach or threatened breach by the Employee of the provisions of this Section, the Employer shall be entitled to an injunction restraining the Employee from so using, disclosing or allowing access to, in whole or in part, the Confidential Information and the Confidential Communications or from rendering any services to any person, firm, corporation, association or other entity to whom the Confidential Information or the Confidential Communications, in whole or in part, have been disclosed or are threatened to be disclosed. Nothing herein shall be construed as prohibiting the Employer from pursuing any other remedies available to the Employer for such breach or threatened breach, including, but not limited to, the recovery of damages and reasonable attorneys' fees from the Employee.

Upon termination of this Agreement by either party for any reason, the Employee shall return to the Employer any of the Confidential Information, Confidential Communications, charts, company literature, reports, Employer credit cards or other proprietary materials of the Employer then in the Employee's possession and all other materials of the Employer which the Board of Directors of the Employer requests the Employee to so return.

This Section shall in all respects survive any termination of this Agreement and shall remain in full force and effect thereafter. In the event that any provision of this Section 8 shall conflict with any term or condition of any other confidentiality agreement between the Employer and the Employee, then the more restrictive provision shall be deemed to apply in order to accomplish the purposes of this Section 8 and such other agreements, that being to protect the Employer's Confidential Information and Confidential Communications.

In the event of the Employee's breach of this Section 8, the Employee shall immediately and irrevocably forfeit future payments under the Severance Package as hereinafter defined in Section 15. Nothing in this paragraph shall be construed to limit or cap the Employer's damages in the event of a breach of this Section 8.

9. Covenant Not to Compete; Non-solicitation of Employees and Customers. For the purposes of this Section 9, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a

5

Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee agrees that while employed by the Employer and for a continuous period of one (1) year following the date of the termination of his employment with the Employer either voluntarily without "Good Reason" or involuntarily by the Company for "cause" (the "Restricted Period"), he shall not (without the express prior written consent of the Board of Directors of the Employer), directly or indirectly, compete with the Employer. In construing the foregoing prohibition, the Employee shall be deemed to be competing with the Employer if he shall become self-employed in, or accept employment with, consult with, render services to or become associated with, own, manage, operate, join, control, or participate in the ownership, management, operation, or control of, or be connected in any material manner with, or directly or indirectly enter into the employment of, or make a substantial investment in, any corporation, partnership, proprietorship or other type of business organization or entity which engages in, any business (a "Competing Business") involving the sale, distribution, development or research concerning diagnostic imaging of the human cardio-vascular system or other lines of the Employer which directly and materially competes with the product lines in or with which the Employer is then currently involved.

The Employee further agrees that, during his employment with the Employer and during the Restricted Period, he shall not solicit any of the Employer's employees, existing customers or prospective customers (of which the Employee is then currently aware), affiliated research institutions or scientists, on behalf of himself or any Competing Business.

This Section 9 shall in all respects survive any termination of this Agreement and shall remain in full force and effect during the Restricted Period.

In the event of the Employee's breach of this Section 9 during the Restricted Period, the Employee shall immediately and irrevocably forfeit future payments to the Employee under the Severance Package as hereinafter defined in
Section 15.

10. Assignment of Rights. Any and all information, data, inventions, discoveries, materials, notebooks and other work product which the Employee conceives, develops or acquires during his employment with the Employer, which directly or indirectly relates to work performed for the Employer, shall be the sole and exclusive property of the Employer. The Employee shall promptly execute any and all documents necessary and take such further actions as the Employer may deem necessary to assign any and all of the Employee's right, title and interest in such property to the Employer.

11. Intellectual Property. For the purposes of this Section 11, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. During the Employee's employment at the Employer, the Employee shall promptly assist with and execute any and all applications, assignments or other documents which an officer or director of the Employer shall deem necessary or useful in order to obtain and maintain patent, trademark or other intellectual property protection for the Employer's products or services. After the termination date of his employment with the Employer, the Employee shall use reasonable

6

efforts to assist the Employer on intellectual property matters as they relate to his employment, and the Employer shall reasonably compensate the Executive for his time and expense.

12. Documents, Records, etc. All documents, records, data, apparatus, equipment and other physical property, whether or not pertaining to Confidential Information, which are furnished to the Employee by the Employer or are produced by the Employee in connection with the Employee's employment will be and remain the sole property of the Employer. The Employee will return to the Employer all such materials and property as and when requested by the Employer. In any event, and whether or not the Employer so specifically requests, the Employee will return all such materials and property immediately upon termination of the Employee's employment for any reason. The Employee will not retain any such material or property or any copies thereof after such termination.

13. Third-Party Agreements and Rights. The Employee hereby confirms that he is not bound by the terms of any agreement with any previous employer or other party which restricts in any way the Employee's use or disclosure of information or the Employee's engagement in any business. The Employee represents to the Employer that the Employee's execution of this Agreement, the Employee's employment with the Employer and the performance of the Employee's proposed duties for the Employer will not violate any obligations the Employee may have to any such previous employer or other party. In the Employee's work for the Employer, the Employee will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Employee will not bring to the premises of the Employer any copies or other tangible embodiments of nonpublic information belonging to or obtained from any such previous employer or other party.

14. Restricted Activities. During the term of this Agreement, the Employee shall not engage in any business activities or ventures outside of the business activities of the Employer without the express prior written consent of the Employer's Board; provided, however, that nothing in this Agreement shall be construed as preventing the Employee from:

(a) investing the Employee's assets in any company or other entity in a manner not prohibited by Section 9 and in such form or manner as shall not require any material activities on the Employee's part in connection with the operations or affairs of the companies or other entities in which such investments are made; or

(b) engaging in religious, charitable or other community or non-profit activities that do not impair the Employee's ability to fulfill the Employee's duties and responsibilities under this Agreement.

15. Termination.

A. Termination Without Cause.

(a) Notwithstanding anything herein to the contrary, this Agreement may be terminated by either the Employer (by act of its Board) or the Employee, at any time, without cause; provided, however, that the party desirous of terminating this Agreement shall

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give the other party prior written notice of such termination. In either event, the Employer may determine the Employee's final day of employment hereunder. The date specified in any notice of termination as the Employee's final day of employment shall be referred to herein as the Termination Date.

(b) In the event that the Employer (by act of its Board) terminates this Agreement without cause pursuant to this subsection (A) of
Section 15, or the Employee voluntarily resigns for Good Reason (defined below), then the Employee shall be entitled to receive severance pay equal the Base Compensation rate as of the Termination Date in equal monthly installments for a period of twelve (12) months (the "Post-Termination Period") from the Termination Date (the "Severance Package"). The Employer also agrees to make available to the Employee, as part of the Severance Package, continuation of group health plan benefits to the extent authorized by and consistent with 29 U.S.C. Section 1161 et seq. (commonly known as "COBRA"), and any other benefits the Employee is receiving as of the Termination Date with the cost of the regular premium for such benefits shared in the same relative proportion by the Employer and the Employee as in effect on the Termination Date.

(c) For purposes of this Agreement, "Good Reason" shall mean:

(i) a reduction of the Employee's salary or insurance benefits other than a reduction approved by the Employee in writing; or

(ii) a significant change in the Employee's title, responsibilities and/or duties which constitutes, when compared to the Employee's title, responsibilities and/or duties as of the Effective Date, a demotion; or

(iii) the relocation of the offices at which the Employee is principally employed as of the Effective Date to a location more than fifty (50) miles from such office, which relocation is not approved by the Executive.

(d) In the event of the Employee's voluntary termination, then the Employee shall, at the request of the Board of the Employer, continue as an employee of the Employer for an additional thirty (30) day period after the Termination Date for the purpose of assisting the Employer in locating and training a suitable replacement for the Employee. During such additional period, the Employee shall be entitled to full compensation and benefits and the Employee shall continue to be bound by all of the terms contained herein. Any such extended term shall extend the Post-Termination Period by an equal number of days.

B. Termination With Cause.

(a) The Employer (by act of its Board) may terminate this Agreement immediately for "cause" by giving written notice to the Employee. As used herein, the term "cause" shall mean the Employee's: (i) addiction to illegal drugs; (ii) willful failure or refusal to perform his duties hereunder after written notice from the Board and an opportunity to cure; (iii) knowing acts of dishonesty which materially adversely affect the Employer; (iv) indictment for a felony or crime involving moral turpitude, fraud, embezzlement or misrepresentation. In the

8

event that this Agreement is terminated pursuant to this subsection (B), the Employee forfeits and shall not be entitled to the Severance Package, or other benefits or bonus of any kind whatsoever for any period after the Termination Date set forth in the notice given by the Employer to the Employee.

C. Disability.

(a) If the Employee shall be disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions under this Agreement, the Employer may remove the Employee from any responsibilities and/or reassign the Employee to another position with the Employer during the period of such disability. If the period of disability extends for more than six (6) months, the Employer may terminate the Employee's employment without further liability on the part of the Employer, except that the Employee shall be entitled to the Severance Package. The Employer may elect, at its sole discretion, to purchase a disability insurance package for the Employee. In the event that the Employer so elects to purchase a disability insurance package and the Employee subsequently becomes entitled to payments of the disability insurance benefit, any payments pursuant to the Severance Package, as defined in this Section 15, or payments of salary by the Employer will be reduced by the amount of the disability insurance benefit payments received by the Employee.

(b) If any question shall arise as to whether during any period the Employee is disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions, the Employee may, and at the request of the Employer shall, submit to the Employer a certification in reasonable detail by a physician selected by the Employer, to whom the Employee or the Employee's guardian has no reasonable objection, as to whether the Employee is so disabled or how long such disability is expected to continue, and such certification shall, for the purposes of this Agreement, be conclusive of the issue. The Employee shall cooperate with any reasonable request of the physician in connection with such certification. If such question shall arise and the Employee shall fail to submit such certification, the Employer's determination of such issue shall be binding on the Employee. Nothing in this Section 15(c) shall be construed to waive the Employee's rights, if any, under existing law including, without limitation, the Family and Medical Leave Act of 1993,29 U.S.C. 2601, et seq. and the Americans with Disabilities Act, 42 U.S.C. 12101 et seq.

D. Death or Retirement. The Employee's employment under this Agreement will be deemed to have terminated without further liability on the part of the Employer if the Employee dies or retires.

E. Certain Termination Benefits. Unless otherwise specifically provided in this Agreement or otherwise required by law, all compensation and benefits payable to the Employee under this Agreement shall terminate on the date of termination of the Employee's employment under this Agreement.

F. No Right to Continuing Employment. The Employee agrees that nothing contained in this Agreement shall be construed to give the Employee a right to continuing employment beyond the Termination Date.

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16. Litigation and Regulatory Cooperation. During and after the Employee's employment, the Employee shall cooperate fully with the Employer in the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Employer which relate to events or occurrences that transpired while the Employee was employed by the Employer. The Employee's full cooperation in connection with such claims or actions shall include, but not be limited to, being available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Employer at mutually convenient times. During and after the Employee's employment, the Employee also shall cooperate fully with the Employer in connection with any investigation or review of any federal, state or local regulatory authority as any such investigation or review relates to events or occurrences that transpired while the Employee was employed by the Employer. The Employer shall reimburse the Employee for any reasonable out-of-pocket expenses incurred in connection with the Employee's performance of obligations pursuant to this
Section 16.

17. Injunction. The Employee agrees that it would be difficult to measure any damages caused to the Employer which might result from any breach by the Employee of the promises set forth in Section 8, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Employee agrees that if the Employee breaches, or proposes to breach, any portion of this Agreement, the Employer shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate preliminary equitable relief to restrain any such breach without showing or proving any actual damage to the Employer.

18. No Assignment. The Employee acknowledges that the services to be rendered by him pursuant to this Agreement are unique. Accordingly, the Employee shall not assign any of his rights or delegate any of his duties or obligations under this Agreement.

19. Severability. Subject only to the reformation of time, geographical and occupational limitations as set forth in Section 20 hereof, all of the terms and provisions contained in this Agreement are severable and, in the event that any portion or provision of this Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be deemed unenforceable or invalid by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or provision in circumstances other than those as to which it is so declared unenforceable or invalid, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

20. Reformation of Time Geographical and Occupational Limitations. In the event that any provision in this Agreement is held to be unenforceable by a court of competent jurisdiction because it exceeds the maximum time, geographical or occupational limitations permitted by applicable law, then such provision(s) shall be and hereby are reformed to the maximum time, geographical and occupational limitations as may be permitted by applicable law.

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21. Specific Performance. Both parties recognize that the services to be rendered under this Agreement by the Employee are special, unique and of an extraordinary character, and that in the event of breach by the Employee of the terms or conditions of this Agreement to be performed by him, the Employer shall be entitled, if it so elects, to institute and prosecute proceedings in any court of competent jurisdiction, either at law or in equity, to obtain damages for any breach of this Agreement to enforce the specific performance thereof by the Employee, or to enjoin the Employee from engaging in such activity, but nothing contained herein shall be construed to prevent such other remedy in the courts, in case of any breach of this Agreement by the Employee, as the Employer may elect to invoke.

22. Massachusetts Law: Choice of Forum. This Agreement shall be governed, construed and interpreted by, and in accordance with, the laws of the Commonwealth of Massachusetts, without reference to its principles of conflicts of laws. Any actions concerning enforcement of this Agreement or in any way relating to the subject matter of this Agreement shall be litigated only in Massachusetts state or federal courts of proper jurisdiction and venue. Each party hereto expressly agrees to submit to such jurisdiction and venue for the purposes of this Agreement. Notwithstanding the foregoing, the Employer may seek to enforce the Employee's covenants described in Sections 6, 7, 8 and 9 hereof in any jurisdiction and venue in which the Employee then resides, breaches or threatens to breach such covenants.

23. Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto, and replaces all prior agreements, promises, representations and understandings between the Employer and the Employee whatsoever concerning the limited subject matter hereof (other than the Stock Plan and any related Stock Option Agreement entered into between the Employer and the Employee). There are no other agreements, conditions or representations, oral or written, express or implied, which form the basis for this Agreement.

24. Assignment; Successors and Assigns, Etc. Neither the Employer nor the Employee may make any assignment of this Agreement or any interest herein, by operation of law or otherwise, without the prior written consent of the other party; provided, however, that the Employer may assign its rights under this Agreement without the consent of the Employee in the event that the Employer shall effect a reorganization, consolidate with or merge into any other corporation, partnership, organization or other entity, or transfer all or substantially all of its properties or assets to any other corporation, partnership, organization or other entity. This Agreement shall inure to the benefit of and be binding upon the Employer and the Employee, their respective successors, executors, administrators, heirs and permitted assigns.

25. Modification. No waiver or modification of this Agreement or of any covenant, condition, or limitation contained herein shall be valid unless in a writing of subsequent date hereto and duly executed by the party to be charged therewith and no evidence of any waiver or modification shall be offered or received in evidence in any proceeding, arbitration, or litigation between the parties hereto arising out of or affecting this Agreement, or the rights or obligations of the parties hereunder, unless such waiver or modification is in writing, duly executed as aforesaid. The parties further agree that the provisions of this Section may not be waived except as herein set forth.

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26. Section Headings. The section headings contained in this Agreement are for convenience only, and shall in no manner be construed as part of this Agreement.

27. Waiver of Breach. The waiver by either party of a breach or violation of any provision of this Agreement shall not operate as, or be construed to be, a waiver of any subsequent breach thereof.

28. Notices. Any and all notices required or permitted to be given under this Agreement shall be sufficient if furnished in writing, sent by certified or registered mail, return receipt requested to the party's address set forth in the Prologue of this Agreement, or to such other address as such party may specify in writing.

29. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document.

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IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year here above first written.

BIOSTREAM, INC.

By: /s/ John W. Babich
    ------------------------
Name: John W. Babich, Ph.D.
Title: President

/s/ David S. Barlow
----------------------------
David S. Barlow

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SCHEDULE A
(As Amended from time to time pursuant to Paragraph 3(a))

Base Compensation

Annual Rate of Base
    Compensation         Agreed to by Employee      Agreed to by Employer
--------------------     ---------------------      ---------------------
$220,000.00

The Employee agrees that payment of his Base Compensation by the Employer shall be deferred until the first to occur of the following events: (1) the Employer has received a cumulative total of at least $2.3 million in cash (comprised of net cash flow from operations, gross proceeds from debt or equity financings or the gross proceeds of any other cash-generating activities) or (2) a Change of Control has occurred. Immediately following the occurrence of either of such events, all deferred Base Compensation shall be paid to the Employee in cash.

(Must be initialed by both parties each time amended to be effective.)

Exhibit A - Form of Promissory Note
Exhibit B - Capitalization Spreadsheet
Exhibit C - Form of Restricted Stock Agreement Exhibit D - Form of Stock Pledge Agreement

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Exhibit 10.9

EMPLOYMENT AGREEMENT
(for John E. McCray)

EMPLOYMENT AGREEMENT (this "Agreement") dated as of March 3, 2003 (the "Effective Date"), by and between Biostream, Inc., a Massachusetts corporation having its principal place of business at 160 Second Street, Cambridge, Massachusetts 02142 (the "Employer"), and John E. McCray (the "Employee").

WITNESSETH:

WHEREAS, the Employer is engaged in the business of developing and marketing imaging pharmaceuticals which detect human disease; and

WHEREAS, the Employee possesses the experience necessary in administration and general and active supervision and direction of the daily operations of a biopharmaceutical business in order to fulfill the responsibilities as Chief Operating Officer of the Employer; and

WHEREAS, the Employer desires to employ the Employee, and the Employee desires to be employed by the Employer, all in accordance with the terms and provisions of this Agreement.

NOW, THEREFORE, in consideration of the covenants and promises hereinafter contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Employer and the Employee represent, covenant and agree as follows:

1. Employment. The Employer hereby employs the Employee to serve as Chief Operating Officer of the Employer in accordance with the terms and provisions of this Agreement, and the Employee hereby accepts such employment with the Employer.

2. Term. The term of this Agreement shall commence on the Effective Date and shall continue until this Agreement is terminated as hereinafter provided.

3. Compensation. As compensation for all services rendered by the Employee to the Employer pursuant to this Agreement, the Employer shall pay to the Employee the following amounts during the term of this Agreement:

(a) Base Compensation. The Employer shall pay to the Employee base compensation at no less than the rate set forth on Schedule A attached hereto and herein incorporated by reference (the "Base Compensation"). The Base Compensation shall be payable pursuant to the Employer's standard payroll practices, except as otherwise noted on Schedule A. The Base Compensation shall be reviewed by the compensation committee of the Board of the Employer annually and increases in the Base Compensation, if any, shall be evidenced by the updating and initialing of Schedule A by both parties hereto.


(b) Incentive Bonus. In addition to the Base Compensation, the Employee shall be eligible to receive an annual fiscal year incentive bonus with a maximum annual amount equal to seventy-five percent (75%) of the then current Base Compensation (the "Incentive Bonus"). Payment of the Incentive Bonus shall be subject to the discretion of the Board and will be based upon accomplishment of goals provided to the Employee by the CEO from time to time and based upon the achievement of specific corporate milestones. The Board may elect to award the Incentive Bonus to the Employee in cash or in the Employer's capital stock (at its then-current fair market value), but a capital stock bonus requires the consent of the Employee.

4. Vacation and Employee Benefits.

(a) Vacation. The Employee shall be entitled to an annual paid vacation equal to four weeks annually. Vacation shall be taken at such times so as not to interfere with the proper operation of the Employer's business.

(b) Benefits Generally. The Employee shall be entitled to receive and participate in such employee benefits as the Employer shall from time to time determine to provide to its executives generally. At a minimum, the Employee shall receive medical and dental insurance at the Employer's expense.

(c) Indemnification Rights. The Employee shall be entitled to indemnification, including advance reimbursement of expenses, to the fullest extent permitted by applicable law, and shall be entitled to receive an indemnification agreement with terms equivalent to any indemnification agreement that the Employer executes with any of its officers or directors.

(d) Registration Rights. The Employee shall be entitled to the benefit of any so-called "piggy-back" registration rights and related provisions that the Employer has granted or grants to any third party on the same basis as the most favorable provisions received by any such third party.

(e) Participation Rights. The Employee shall be entitled to rights equivalent to the Employer's outside investors with respect to rights to purchase additional equity securities issued by the Employer in order to maintain the Employee's percentage interest in the Employer's equity securities.

5. Stock Incentives.

(a) Options. Pursuant to the provisions of the Company's 1997 Stock Option Plan, as may be amended from time to time (the "Plan"), and subject to the vesting provisions described below the Company hereby grants to the Employee an option to purchase 1,262,820 shares of its Common Stock ($.01 par value) (the "Optioned Shares") at a price of $0.10 per share, in accordance with and subject to all the terms and conditions of the Plan and subject to the terms and conditions hereinafter set forth.

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(b) Vesting. 20% of the restricted shares shall be vested upon purchase and the remainder shall be "unvested shares." An additional 5% of the restricted shares shall vest on each quarterly (three-month) anniversary of the Effective Date, provided that the Employee is still employed by the Employer on such date or is then receiving a Severance Package (as defined in Section 15 below). In the event of a Change of Control (as defined below), all of the unvested restricted shares immediately shall vest, provided that the Employee is still employed by the Employer on the date of such Change of Control, or is then receiving a Severance Package.

(c) Change of Control. For purposes of this Agreement "Change of Control" shall mean the occurrence of one or more of the following events:

(i) any "person" (as such term is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) becomes a "beneficial owner" (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the Employer, any trustee or other fiduciary holding securities under an employee benefit plan of the Employer, or any corporation owned, directly or indirectly, by the stockholders of the Employer, in substantially the same proportions as their ownership of stock of the Employer), or any or group of persons acting in concert becomes a beneficial owner, directly or indirectly, of securities of the Employer, representing more than fifty percent (50%) of the combined voting power or fully diluted equity interest of the Employer's then outstanding equity securities, except as a result of a financing transaction where all proceeds are received directly by the Company that is not intended as a sale of the business of the Employer; or

(ii) the stockholders of the Employer approve a merger or consolidation of the Employer with any other corporation or other entity, other than (A) a merger or consolidation which would result in the equity securities of the Employer outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into equity securities of the surviving entity) fifty percent (50%) or more of the outstanding equity interest of the Employer or such surviving entity outstanding immediately after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Employer (or similar transaction) in which no "person" (as hereinabove defined) other than Employee acquires more than fifty percent (50%) of the equity interest of the Employer's then outstanding securities; or

(iii) the stockholders of the Employer approve a plan of complete liquidation of the Employer or an agreement for the sale or disposition by the Employer of all or substantially all of the Employer's assets.

6. Description of Duties. During the term of this Agreement, the Employee shall be the Chief Operating Officer of the Employer and shall:

(a) Devote on a full time basis all necessary time, best efforts, professional skills, attention and energies to the fulfillment of the duties customarily associated with such position and the accomplishment of the goals provided by the CEO of the Employer to the Employee from time to time; and

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(b) Act in accordance herewith, and in all accounts be responsible and responsive to, the Board of Directors and CEO of Employer.

7. General Services. During the term of this Agreement, the Employee shall:

(a) Observe the Employer's policies and standards of conduct, as well as customary standards of business conduct, including any standards prescribed by law or regulation;

(b) Perform his duties hereunder in a manner that preserves and protects the Employer's business reputation; and

(c) Do all things and render such services as may be necessary or beneficial in carrying out any of the foregoing.

8. Non-Disclosure of Proprietary or Confidential Information and Confidential Communications. For the purposes of this Section 8, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee recognizes and acknowledges that the marketing plans and business strategy, the names and addresses of the Employer's customers, the particular needs and application of such customers for diagnostic imaging techniques, the names and addresses of the Employer's suppliers, the Employer's purchasing history with its suppliers, the names and other pertinent data concerning the persons employed by the Employer's suppliers who are responsible for supplying the Employer with products and services, the Employer's proprietary computer software programs, trade secrets and any other confidential and proprietary information concerning the business or affairs of the Employer (including but not limited to marketing and business plans and strategies, research protocols, procedures data, results, and cost information) (hereinafter collectively referred to as the Confidential Information) constitute a valuable, proprietary, special and unique asset of the Employer's business. The Employee further recognizes and acknowledges that any communications, whether written, oral or otherwise, that the Employer or any of the Employer's employees has with the Employer's existing or prospective customers and clients and affiliated research institutions and scientists are extremely confidential (hereinafter the "Confidential Communications"). The term Confidential Information shall exclude any information that has been made public through no fault of the Employee.

The Employee shall not, for any reason whatsoever, during or after the termination of his employment with the Employer, use, disclose or allow access to, for his own benefit or for that of another, the Confidential Information or the Confidential Communications (or any part thereof) to any person, firm, corporation, association or other entity for any reason or for any purpose whatsoever.

In the event of a breach or threatened breach by the Employee of the provisions of this Section, the Employer shall be entitled to an injunction restraining the Employee from so using, disclosing or allowing access to, in whole or in part, the Confidential Information and the

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Confidential Communications or from rendering any services to any person, firm, corporation, association or other entity to whom the Confidential Information or the Confidential Communications, in whole or in part, have been disclosed or are threatened to be disclosed. Nothing herein shall be construed as prohibiting the Employer from pursuing any other remedies available to the Employer for such breach or threatened breach, including, but not limited to, the recovery of damages and reasonable attorneys' fees from the Employee.

Upon termination of this Agreement by either party for any reason, the Employee shall return to the Employer any of the Confidential Information, Confidential Communications, charts, company literature, reports, Employer credit cards or other proprietary materials of the Employer then in the Employee's possession and all other materials of the Employer which the Board of Directors of the Employer requests the Employee to so return.

This Section shall in all respects survive any termination of this Agreement and shall remain in full force and effect thereafter. In the event that any provision of this Section 8 shall conflict with any term or condition of any other confidentiality agreement between the Employer and the Employee, then the more restrictive provision shall be deemed to apply in order to accomplish the purposes of this Section 8 and such other agreements, that being to protect the Employer's Confidential Information and Confidential Communications.

In the event of the Employee's breach of this Section 8, the Employee shall immediately and irrevocably forfeit future payments under the Severance Package as hereinafter defined in Section 15. Nothing in this paragraph shall be construed to limit or cap the Employer's damages in the event of a breach of this Section 8.

9. Covenant Not to Compete; Non-solicitation of Employees and Customers. For the purposes of this Section 9, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. The Employee agrees that while employed by the Employer and for a continuous period of one (1) year following the date of the termination of his employment with the Employer either voluntarily without "Good Reason" or involuntarily by the Company for "cause" (the "Restricted Period"), he shall not (without the express prior written consent of the Board of Directors of the Employer), directly or indirectly, compete with the Employer. In construing the foregoing prohibition, the Employee shall be deemed to be competing with the Employer if he shall become self-employed in, or accept employment with, consult with, render services to or become associated with, own, manage, operate, join, control, or participate in the ownership, management, operation, or control of, or be connected in any material manner with, or directly or indirectly enter into the employment of, or make a substantial investment in, any corporation, partnership, proprietorship or other type of business organization or entity which engages in, any business (a "Competing Business") involving the sale, distribution, development or research concerning diagnostic imaging of the human cardio-vascular system or other lines of the Employer which directly and materially competes with the product lines in or with which the Employer is then currently involved.

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The Employee further agrees that, during his employment with the Employer and during the Restricted Period, he shall not solicit any of the Employer's employees, existing customers or prospective customers (of which the Employee is then currently aware), affiliated research institutions or scientists, on behalf of himself or any Competing Business.

This Section 9 shall in all respects survive any termination of this Agreement and shall remain in full force and effect during the Restricted Period.

In the event of the Employee's breach of this Section 9 during the Restricted Period, the Employee shall immediately and irrevocably forfeit future payments to the Employee under the Severance Package as hereinafter defined in
Section 15.

10. Assignment of Rights. Any and all information, data, inventions, discoveries, materials, notebooks and other work product which the Employee conceives, develops or acquires during his employment with the Employer, which directly or indirectly relates to work performed for the Employer, shall be the sole and exclusive property of the Employer. The Employee shall promptly execute any and all documents necessary and take such further actions as the Employer may deem necessary to assign any and all of the Employee's right, title and interest in such property to the Employer.

11. Intellectual Property. For the purposes of this Section 11, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by Biostream, Inc. During the Employee's employment at the Employer, the Employee shall promptly assist with and execute any and all applications, assignments or other documents which an officer or director of the Employer shall deem necessary or useful in order to obtain and maintain patent, trademark or other intellectual property protection for the Employer's products or services. After the termination date of his employment with the Employer, the Employee shall use reasonable efforts to assist the Employer on intellectual property matters as they relate to his employment, and the Employer shall reasonably compensate the Executive for his time and expense.

12. Documents, Records, etc. All documents, records, data, apparatus, equipment and other physical property, whether or not pertaining to Confidential Information, which are furnished to the Employee by the Employer or are produced by the Employee in connection with the Employee's employment will be and remain the sole property of the Employer. The Employee will return to the Employer all such materials and property as and when requested by the Employer. In any event, and whether or not the Employer so specifically requests, the Employee will return all such materials and property immediately upon termination of the Employee's employment for any reason. The Employee will not retain any such material or property or any copies thereof after such termination.

13. Third-Party Agreements and Rights. The Employee hereby confirms that he is not bound by the terms of any agreement with any previous employer or other party which restricts in any way the Employee's use or disclosure of information or the Employee's engagement in any business. The Employee represents to the Employer that the Employee's

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execution of this Agreement, the Employee's employment with the Employer and the performance of the Employee's proposed duties for the Employer will not violate any obligations the Employee may have to any such previous employer or other party. In the Employee's work for the Employer, the Employee will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Employee will not bring to the premises of the Employer any copies or other tangible embodiments of nonpublic information belonging to or obtained from any such previous employer or other party.

14. Restricted Activities. During the term of this Agreement, the Employee shall not engage in any business activities or ventures outside of the business activities of the Employer without the express prior written consent of the Employer's Board; provided, however, that nothing in this Agreement shall be construed as preventing the Employee from:

(a) investing the Employee's assets in any company or other entity in a manner not prohibited by Section 9 and in such form or manner as shall not require any material activities on the Employee's part in connection with the operations or affairs of the companies or other entities in which such investments are made; or

(b) engaging in religious, charitable or other community or non-profit activities that do not impair the Employee's ability to fulfill the Employee's duties and responsibilities under this Agreement.

15. Termination.

A. Termination Without Cause.

(a) Notwithstanding anything herein to the contrary, this Agreement may be terminated by either the Employer (by act of its Board) or the Employee, at any time, without cause; provided, however, that the party desirous of terminating this Agreement shall give the other party prior written notice of such termination. In either event, the Employer may determine the Employee's final day of employment hereunder. The date specified in any notice of termination as the Employee's final day of employment shall be referred to herein as the Termination Date.

(b) In the event that the Employer (by act of its Board) terminates this Agreement without cause pursuant to this subsection (A) of
Section 15, or the Employee voluntarily resigns for Good Reason (defined below), then the Employee shall be entitled to receive severance pay equal the Base Compensation rate as of the Termination Date in equal monthly installments for a period of twelve (12) months (the "Post-Termination Period") from the Termination Date (the "Severance Package"). The Employer also agrees to make available to the Employee, as part of the Severance Package, continuation of group health plan benefits to the extent authorized by and consistent with 29 U.S.C. Section 1161 et seq. (commonly known as "COBRA"), and any other benefits the Employee is receiving as of the Termination Date with the cost of the regular premium for such benefits shared in the same relative proportion by the Employer and the Employee as in effect on the Termination Date.

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(c) For purposes of this Agreement, "Good Reason" shall mean:

(i) a reduction of the Employee's salary or insurance benefits other than a reduction approved by the Employee in writing; or

(ii) a significant change in the Employee's title, responsibilities and/or duties which constitutes, when compared to the Employee's title, responsibilities and/or duties as of the Effective Date, a demotion; or

(iii) the relocation of the offices at which the Employee is principally employed as of the Effective Date to a location more than fifty (50) miles from such office, which relocation is not approved by the Employee.

(d) In the event of the Employee's voluntary termination, then the Employee shall, at the request of the CEO of the Employer, continue as an employee of the Employer for an additional thirty (30) day period after the Termination Date for the purpose of assisting the Employer in locating and training a suitable replacement for the Employee. During such additional period, the Employee shall be entitled to full compensation and benefits and the Employee shall continue to be bound by all of the terms contained herein. Any such extended term shall extend the Post-Termination Period by an equal number of days.

B. Termination With Cause.

(a) The Employer (by act of its Board or CEO) may terminate this Agreement immediately for "cause" by giving written notice to the Employee. As used herein, the term "cause" shall mean the Employee's: (i) addiction to illegal drugs; (ii) willful failure or refusal to perform his duties hereunder after written notice from the CEO and an opportunity to cure; (iii) knowing acts of dishonesty which materially adversely affect the Employer; (iv) indictment for a felony or crime involving moral turpitude, fraud, embezzlement or misrepresentation. In the event that this Agreement is terminated pursuant to this subsection (B), the Employee forfeits and shall not be entitled to the Severance Package, or other benefits or bonus of any kind whatsoever for any period after the Termination Date set forth in the notice given by the Employer to the Employee.

C. Disability.

(a) If the Employee shall be disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions under this Agreement, the Employer may remove the Employee from any responsibilities and/or reassign the Employee to another position with the Employer during the period of such disability. If the period of disability extends for more than six (6) months, the Employer may terminate the Employee's employment without further liability on the part of the Employer, except that the Employee shall be entitled to the Severance Package. The Employer may elect, at its sole discretion, to purchase a disability insurance package for the Employee. In the event that the Employer so elects to purchase a disability insurance package and the Employee subsequently becomes entitled to payments of the disability insurance benefit, any payments pursuant to the Severance Package, as

8

defined in this Section 15, or payments of salary by the Employer will be reduced by the amount of the disability insurance benefit payments received by the Employee.

(b) If any question shall arise as to whether during any period the Employee is disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions, the Employee may, and at the request of the Employer shall, submit to the Employer a certification in reasonable detail by a physician selected by the Employer, to whom the Employee or the Employee's guardian has no reasonable objection, as to whether the Employee is so disabled or how long such disability is expected to continue, and such certification shall, for the purposes of this Agreement, be conclusive of the issue. The Employee shall cooperate with any reasonable request of the physician in connection with such certification. If such question shall arise and the Employee shall fail to submit such certification, the Employer's determination of such issue shall be binding on the Employee. Nothing in this Section 15(c) shall be construed to waive the Employee's rights, if any, under existing law including, without limitation, the Family and Medical Leave Act of 1993, 29 U.S.C. 2601, et seq. and the Americans with Disabilities Act, 42 U.S.C. 12101 et seq.

D. Death or Retirement. The Employee's employment under this Agreement will be deemed to have terminated without further liability on the part of the Employer if the Employee dies or retires.

E. Certain Termination Benefits. Unless otherwise specifically provided in this Agreement or otherwise required by law, all compensation and benefits payable to the Employee under this Agreement shall terminate on the date of termination of the Employee's employment under this Agreement.

F. No Right to Continuing Employment. The Employee agrees that nothing contained in this Agreement shall be construed to give the Employee a right to continuing employment beyond the Termination Date.

16. Litigation and Regulatory Cooperation. During and after the Employee's employment, the Employee shall cooperate fully with the Employer in the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Employer which relate to events or occurrences that transpired while the Employee was employed by the Employer. The Employee's full cooperation in connection with such claims or actions shall include, but not be limited to, being available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Employer at mutually convenient times. During and after the Employee's employment, the Employee also shall cooperate fully with the Employer in connection with any investigation or review of any federal, state or local regulatory authority as any such investigation or review relates to events or occurrences that transpired while the Employee was employed by the Employer. The Employer shall reimburse the Employee for any reasonable out-of-pocket expenses incurred in connection with the Employee's performance of obligations pursuant to this
Section 16.

17. Injunction. The Employee agrees that it would be difficult to measure any damages caused to the Employer which might result from any breach by the Employee of the

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promises set forth in Section 8, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Employee agrees that if the Employee breaches, or proposes to breach, any portion of this Agreement, the Employer shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate preliminary equitable relief to restrain any such breach without showing or proving any actual damage to the Employer.

18. No Assignment. The Employee acknowledges that the services to be rendered by him pursuant to this Agreement are unique. Accordingly, the Employee shall not assign any of his rights or delegate any of his duties or obligations under this Agreement.

19. Severability. Subject only to the reformation of time, geographical and occupational limitations as set forth in Section 20 hereof, all of the terms and provisions contained in this Agreement are severable and, in the event that any portion or provision of this Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be deemed unenforceable or invalid by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or provision in circumstances other than those as to which it is so declared unenforceable or invalid, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

20. Reformation of Time Geographical and Occupational Limitations. In the event that any provision in this Agreement is held to be unenforceable by a court of competent jurisdiction because it exceeds the maximum time, geographical or occupational limitations permitted by applicable law, then such provision(s) shall be and hereby are reformed to the maximum time, geographical and occupational limitations as may be permitted by applicable law.

21. Specific Performance. Both parties recognize that the services to be rendered under this Agreement by the Employee are special, unique and of an extraordinary character, and that in the event of breach by the Employee of the terms or conditions of this Agreement to be performed by him, the Employer shall be entitled, if it so elects, to institute and prosecute proceedings in any court of competent jurisdiction, either at law or in equity, to obtain damages for any breach of this Agreement to enforce the specific performance thereof by the Employee, or to enjoin the Employee from engaging in such activity, but nothing contained herein shall be construed to prevent such other remedy in the courts, in case of any breach of this Agreement by the Employee, as the Employer may elect to invoke.

22. Massachusetts Law: Choice of Forum. This Agreement shall be governed, construed and interpreted by, and in accordance with, the laws of the Commonwealth of Massachusetts, without reference to its principles of conflicts of laws. Any actions concerning enforcement of this Agreement or in any way relating to the subject matter of this Agreement shall be litigated only in Massachusetts state or federal courts of proper jurisdiction and venue. Each party hereto expressly agrees to submit to such jurisdiction and venue for the purposes of this Agreement. Notwithstanding the foregoing, the Employer may seek to enforce the

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Employee's covenants described in Sections 6, 7, 8 and 9 hereof in any jurisdiction and venue in which the Employee then resides, breaches or threatens to breach such covenants.

23. Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto, and replaces all prior agreements, promises, representations and understandings between the Employer and the Employee whatsoever concerning the limited subject matter hereof (other than the Stock Plan and any related Stock Option Agreement entered into between the Employer and the Employee). There are no other agreements, conditions or representations, oral or written, express or implied, which form the basis for this Agreement.

24. Assignment; Successors and Assigns, Etc. Neither the Employer nor the Employee may make any assignment of this Agreement or any interest herein, by operation of law or otherwise, without the prior written consent of the other party; provided, however, that the Employer may assign its rights under this Agreement without the consent of the Employee in the event that the Employer shall effect a reorganization, consolidate with or merge into any other corporation, partnership, organization or other entity, or transfer all or substantially all of its properties or assets to any other corporation, partnership, organization or other entity. This Agreement shall inure to the benefit of and be binding upon the Employer and the Employee, their respective successors, executors, administrators, heirs and permitted assigns.

25. Modification. No waiver or modification of this Agreement or of any covenant, condition, or limitation contained herein shall be valid unless in a writing of subsequent date hereto and duly executed by the party to be charged therewith and no evidence of any waiver or modification shall be offered or received in evidence in any proceeding, arbitration, or litigation between the parties hereto arising out of or affecting this Agreement, or the rights or obligations of the parties hereunder, unless such waiver or modification is in writing, duly executed as aforesaid. The parties further agree that the provisions of this Section may not be waived except as herein set forth.

26. Section Headings. The section headings contained in this Agreement are for convenience only, and shall in no manner be construed as part of this Agreement.

27. Waiver of Breach. The waiver by either party of a breach or violation of any provision of this Agreement shall not operate as, or be construed to be, a waiver of any subsequent breach thereof.

28. Notices. Any and all notices required or permitted to be given under this Agreement shall be sufficient if furnished in writing, sent by certified or registered mail, return receipt requested to the party's address set forth in the Prologue of this Agreement, or to such other address as such party may specify in writing.

29. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document.

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IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year here above first written.

BIOSTREAM, INC.

By: /s/ David S. Barlow
    -----------------------
Name: David S. Barlow
Title: Chairman & CEO

/s/ John E. McCray
---------------------------
John E. McCray

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SCHEDULE A
(As Amended from time to time pursuant to Paragraph 3(a))

Base Compensation

Annual Rate of Base
    Compensation         Agreed to by Employee       Agreed to by Employer
-------------------      ---------------------       ---------------------
$ 175,000.00

(Must be initialed by both parties each time amended to be effective.)

Exhibit A - Incentive Stock Option Grant

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Exhibit 10.10

EMPLOYMENT AGREEMENT
(for Nicholas Borys)

EMPLOYMENT AGREEMENT (this "Agreement") dated as of May 1 2004 (the "Effective Date"), by and between Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation having its principal place of business at 160 Second Street, Cambridge, Massachusetts 02142 (the "Employer"), and Nicholas Borys (the "Employee").

WITNESSETH:

WHEREAS, the Employer is engaged in the business of developing and marketing molecular imaging pharmaceuticals and radiotherapeutics that detect and treat human disease; and

WHEREAS, the Employee possesses the experience necessary in administration and general and active supervision and direction of the daily operations of a biopharmaceutical business in order to fulfill the responsibilities as Chief Medical Officer of the Employer; and

WHEREAS, the Employer desires to employ the Employee, and the Employee desires to be employed by the Employer, all in accordance with the terms and provisions of this Agreement.

NOW, THEREFORE, in consideration of the covenants and promises hereinafter contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Employer and the Employee represent, covenant and agree as follows:

1. Employment. The Employer hereby employs the Employee to serve as Chief Medical Officer of the Employer in accordance with the terms and provisions of this Agreement, and the Employee hereby accepts such employment with the Employer.

2. Term. The term of this Agreement shall commence on the Effective Date and shall continue until this Agreement is terminated as hereinafter provided.

3. Compensation. As compensation for all services rendered by the Employee to the Employer pursuant to this Agreement, the Employer shall pay to the Employee the following amounts during the term of this Agreement:

(a) Base Compensation. The Employer shall pay to the Employee base compensation at no less than the rate set forth on Schedule A attached hereto and herein incorporated by reference (the "Base Compensation"). The Base Compensation shall be payable pursuant to the Employer's standard payroll practices, except as otherwise noted on Schedule A. The Base Compensation shall be reviewed by the compensation committee of the Board of the Employer annually and increases in the Base Compensation, if any, shall be evidenced by the updating and initialing of Schedule A by both parties hereto.


(b) Incentive Bonus. In addition to the Base Compensation, the Employee shall be eligible to receive an annual fiscal year incentive bonus with a maximum annual amount equal to fifty percent (50%) of the then current Base Compensation (the "Incentive Bonus"). Payment of the Incentive Bonus shall be subject to the discretion of the Board and will be based upon accomplishment of goals provided to the Employee by the President and Chief Scientific Officer from time to time and based upon the achievement of specific corporate milestones. The Board may elect to award the Incentive Bonus to the Employee in cash or in the Employer's capital stock (at its then-current fair market value), but a capital stock bonus requires the consent of the Employee.

4. Vacation and Employee Benefits.

(a) Vacation. The Employee shall be entitled to paid vacation equal to four weeks annually. Vacation shall be taken at such times so as not to interfere with the proper operation of the Employer's business.

(b) Benefits Generally. The Employee shall be entitled to receive and participate in such employee benefits as the Employer shall from time to time determine to provide to its executives generally.

(c) Relocation Expenses. The Employer will reimburse the Employee for reasonable travel expenses for weekly trips from New Hope, PA to the Employer's offices in Cambridge and reasonable lodging expenses associated therewith. The Employer will also be responsible for the payment of the Employee's lease of an apartment at 157 Sixth St. in Cambridge for the period June 1, 2004 to May 31, 2005.

5. Stock Incentives.

(a) Options. Pursuant to the provisions of the Company's 1997 Stock Option Plan, as may be amended from time to time (the "Plan"), and subject to the approval by the Employer's Board of Directors, the Employer will grant to the Employee an option to purchase 250,000 shares of its Common Stock ($.01 par value) (the "Optioned Shares") at an exercise price equal to the fair market value of the Employer's Common Stock on the date of grant, which is currently $0.10 per share. The Optioned Shares shall vest over a four year period in accordance with and subject to all the terms and conditions of the Plan and a separate stock option agreement. In the event of a Change of Control (as defined below), all of the unvested Optioned Shares immediately shall vest, provided that the Employee is still employed by the Employer on the date of such Change of Control, or is then receiving a Severance Package. The Employee may be eligible, subject to the determination of the Employer's Board of Directors, in its sole discretion, to receive an additional option grant to purchase up to 100,000 shares of the Employer's Common Stock upon the successful achievement of performance goals to be mutually agreed to by the Employee and the Employer.

(b) Change of Control. For purposes of this Agreement "Change of Control" shall mean the occurrence of one or more of the following events:

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(i) any "person" (as such term is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) becomes a "beneficial owner" (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the Employer, any trustee or other fiduciary holding securities under an employee benefit plan of the Employer, or any corporation owned, directly or indirectly, by the stockholders of the Employer, in substantially the same proportions as their ownership of stock of the Employer), or any or group of persons acting in concert becomes a beneficial owner, directly or indirectly, of securities of the Employer, representing more than fifty percent (50%) of the combined voting power or fully diluted equity interest of the Employer's then outstanding equity securities, except as a result of a financing transaction where all proceeds are received directly by the Company that is not intended as a sale of the business of the Employer; or

(ii) the stockholders of the Employer approve a merger or consolidation of the Employer with any other corporation or other entity, other than (A) a merger or consolidation which would result in the equity securities of the Employer outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into equity securities of the surviving entity) fifty percent (50%) or more of the outstanding equity interest of the Employer or such surviving entity outstanding immediately after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Employer (or similar transaction) in which no "person" (as hereinabove defined) other than Employee acquires more than fifty percent (50%) of the equity interest of the Employer's then outstanding securities; or

(iii) the stockholders of the Employer approve a plan of complete liquidation of the Employer or an agreement for the sale or disposition by the Employer of all or substantially all of the Employer's assets.

6. Description of Duties. During the term of this Agreement, the Employee shall be the Chief Medical Officer of the Employer and shall:

(a) devote on a full time basis all necessary time, best efforts, professional skills, attention and energies to the fulfillment of the duties customarily associated with such position and the accomplishment of the goals provided by the President and Chief Scientific Officer of the Employer to the Employee from time to time; and

(b) act in accordance herewith, and in all accounts be responsible and responsive to, the Board of Directors and President of Employer.

7. General Services. During the term of this Agreement, the Employee shall:

(a) observe the Employer's policies and standards of conduct, as well as customary standards of business conduct, including any standards prescribed by law or regulation;

(b) perform his duties hereunder in a manner that preserves and protects the Employer's business reputation; and

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(c) do all things and render such services as may be necessary or beneficial in carrying out any of the foregoing.

8. Non-Disclosure of Proprietary or Confidential Information and Confidential Communications. For the purposes of this Section 8, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. The Employee recognizes and acknowledges that the marketing plans and business strategy, the names and addresses of the Employer's customers, the particular needs and application of such customers for diagnostic imaging techniques, the names and addresses of the Employer's suppliers, the Employer's purchasing history with its suppliers, the names and other pertinent data concerning the persons employed by the Employer's suppliers who are responsible for supplying the Employer with products and services, the Employer's proprietary computer software programs, trade secrets and any other confidential and proprietary information concerning the business or affairs of the Employer (including but not limited to marketing and business plans and strategies, research protocols, procedures data, results, and cost information) (hereinafter collectively referred to as the "Confidential Information") constitute a valuable, proprietary, special and unique asset of the Employer's business. The Employee further recognizes and acknowledges that any communications, whether written, oral or otherwise, that the Employer or any of the Employer's employees has with the Employer's existing or prospective customers and clients and affiliated research institutions and scientists are extremely confidential (hereinafter the "Confidential Communications"). The term Confidential Information shall exclude any information that has been made public through no fault of the Employee.

The Employee shall not, for any reason whatsoever, during or after the termination of his employment with the Employer, use, disclose or allow access to, for his own benefit or for that of another, the Confidential Information or the Confidential Communications (or any part thereof) to any person, firm, corporation, association or other entity for any reason or for any purpose whatsoever.

In the event of a breach or threatened breach by the Employee of the provisions of this Section, the Employer shall be entitled to an injunction restraining the Employee from so using, disclosing or allowing access to, in whole or in part, the Confidential Information and the Confidential Communications or from rendering any services to any person, firm, corporation, association or other entity to whom the Confidential Information or the Confidential Communications, in whole or in part, have been disclosed or are threatened to be disclosed. Nothing herein shall be construed as prohibiting the Employer from pursuing any other remedies available to the Employer for such breach or threatened breach, including, but not limited to, the recovery of damages and reasonable attorneys' fees from the Employee.

Upon termination of this Agreement by either party for any reason, the Employee shall return to the Employer any of the Confidential Information, Confidential Communications, charts, company literature, reports, Employer credit cards or other proprietary materials of the Employer then in the Employee's possession and all other materials of the Employer which the Board of Directors of the Employer requests the Employee to so return.

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This Section shall in all respects survive any termination of this Agreement and shall remain in full force and effect thereafter. In the event that any provision of this Section 8 shall conflict with any term or condition of any other confidentiality agreement between the Employer and the Employee, then the more restrictive provision shall be deemed to apply in order to accomplish the purposes of this Section 8 and such other agreements, that being to protect the Employer's Confidential Information and Confidential Communications.

In the event of the Employee's breach of this Section 8, the Employee shall immediately and irrevocably forfeit future payments under the Severance Package as hereinafter defined in Section 15. Nothing in this paragraph shall be construed to limit or cap the Employer's damages in the event of a breach of this Section 8.

9. Covenant Not to Compete; Non-solicitation of Employees and Customers. For the purposes of this Section 9, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. The Employee agrees that while employed by the Employer and for a continuous period of one (1) year following the date of the termination of his employment with the Employer either voluntarily without "Good Reason" or involuntarily by the Company for "cause" (the "Restricted Period"), he shall not (without the express prior written consent of the Board of Directors of the Employer), directly or indirectly, compete with the Employer. In construing the foregoing prohibition, the Employee shall be deemed to be competing with the Employer if he shall become self-employed in, or accept employment with, consult with, render services to or become associated with, own, manage, operate, join, control, or participate in the ownership, management, operation, or control of, or be connected in any material manner with, or directly or indirectly enter into the employment of, or make a substantial investment in, any corporation, partnership, proprietorship or other type of business organization or entity which engages in, any business (a "Competing Business") involving the sale, distribution, development or research concerning diagnostic imaging of the human cardio-vascular system or other lines of the Employer which directly and materially competes with the product lines in or with which the Employer is then currently involved.

The Employee further agrees that, during his employment with the Employer and during the Restricted Period, he shall not solicit any of the Employer's employees, existing customers or prospective customers (of which the Employee is then currently aware), affiliated research institutions or scientists, on behalf of himself or any Competing Business.

This Section 9 shall in all respects survive any termination of this Agreement and shall remain in full force and effect during the Restricted Period.

In the event of the Employee's breach of this Section 9 during the Restricted Period, the Employee shall immediately and irrevocably forfeit future payments to the Employee under the Severance Package as hereinafter defined in
Section 15.

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10. Assignment of Rights. Any and all information, data, inventions, discoveries, materials, notebooks and other work product which the Employee conceives, develops or acquires during his employment with the Employer, which directly or indirectly relates to work performed for the Employer, shall be the sole and exclusive property of the Employer. The Employee shall promptly execute any and all documents necessary and take such further actions as the Employer may deem necessary to assign any and all of the Employee's right, title and interest in such property to the Employer.

11. Intellectual Property. For the purposes of this Section 11, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. During the Employee's employment at the Employer, the Employee shall promptly assist with and execute any and all applications, assignments or other documents which an officer or director of the Employer shall deem necessary or useful in order to obtain and maintain patent, trademark or other intellectual property protection for the Employer's products or services. After the termination date of his employment with the Employer, the Employee shall use reasonable efforts to assist the Employer on intellectual property matters as they relate to his employment, and the Employer shall reasonably compensate the Executive for his time and expense.

12. Documents, Records, etc. All documents, records, data, apparatus, equipment and other physical property, whether or not pertaining to Confidential Information, which are furnished to the Employee by the Employer or are produced by the Employee in connection with the Employee's employment will be and remain the sole property of the Employer. The Employee will return to the Employer all such materials and property as and when requested by the Employer. In any event, and whether or not the Employer so specifically requests, the Employee will return all such materials and property immediately upon termination of the Employee's employment for any reason. The Employee will not retain any such material or property or any copies thereof after such termination.

13. Third-Party Agreements and Rights. The Employee hereby confirms that he is not bound by the terms of any agreement with any previous employer or other party which restricts in any way the Employee's use or disclosure of information or the Employee's engagement in any business. The Employee represents to the Employer that the Employee's execution of this Agreement, the Employee's employment with the Employer and the performance of the Employee's proposed duties for the Employer will not violate any obligations the Employee may have to any such previous employer or other party. In the Employee's work for the Employer, the Employee will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Employee will not bring to the premises of the Employer any copies or other tangible embodiments of nonpublic information belonging to or obtained from any such previous employer or other party.

14. Restricted Activities. During the term of this Agreement, the Employee shall not engage in any business activities or ventures outside of the business activities of the Employer without the express prior written consent of the Employer's Board; provided, however, that nothing in this Agreement shall be construed as preventing the Employee from:

6

(a) investing the Employee's assets in any company or other entity in a manner not prohibited by Section 9 and in such form or manner as shall not require any material activities on the Employee's part in connection with the operations or affairs of the companies or other entities in which such investments are made; or

(b) engaging in religious, charitable or other community or non-profit activities that do not impair the Employee's ability to fulfill the Employee's duties and responsibilities under this Agreement.

15. Termination.

A. Termination Without Cause.

(a) Notwithstanding anything herein to the contrary, this Agreement may be terminated by either the Employer (by act of its Board) or the Employee, at any time, without cause; provided, however, that the party desirous of terminating this Agreement shall give the other party prior written notice of such termination. In either event, the Employer may determine the Employee's final day of employment hereunder. The date specified in any notice of termination as the Employee's final day of employment shall be referred to herein as the Termination Date.

(b) In the event that the Employer (by act of its Board) terminates this Agreement without cause pursuant to this subsection (A) of
Section 15, or the Employee voluntarily resigns for Good Reason (defined below), then the Employee shall be entitled to receive severance pay equal the Base Compensation rate as of the Termination Date in equal monthly installments for a period of twelve (12) months (the "Post-Termination Period") from the Termination Date (the "Severance Package"). The Employer also agrees to make available to the Employee, as part of the Severance Package, continuation of group health plan benefits to the extent authorized by and consistent with 29 U.S.C. Section 1161 et seq. (commonly known as "COBRA"), and any other benefits the Employee is receiving as of the Termination Date with the cost of the regular premium for such benefits shared in the same relative proportion by the Employer and the Employee as in effect on the Termination Date.

(c) For purposes of this Agreement, "Good Reason" shall mean:

(i) a reduction of the Employee's salary or insurance benefits other than a reduction approved by the Employee in writing; or

(ii) a significant change in the Employee's title, responsibilities and/or duties which constitutes, when compared to the Employee's title, responsibilities and/or duties as of the Effective Date, a demotion; or

(iii) the relocation of the offices at which the Employee is principally employed as of the Effective Date to a location more than fifty (50) miles from such office, which relocation is not approved by the Employee.

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(d) In the event of the Employee's voluntary termination, then the Employee shall, at the request of the CEO of the Employer, continue as an employee of the Employer for an additional thirty (30) day period after the Termination Date for the purpose of assisting the Employer in locating and training a suitable replacement for the Employee. During such additional period, the Employee shall be entitled to full compensation and benefits and the Employee shall continue to be bound by all of the terms contained herein. Any such extended term shall extend the Post-Termination Period by an equal number of days.

B. Termination With Cause.

(a) The Employer (by act of its Board, CEO or President) may terminate this Agreement immediately for "cause" by giving written notice to the Employee. As used herein, the term "cause" shall mean the Employee's: (i) addiction to illegal drugs; (ii) willful failure or refusal to perform his duties hereunder after written notice from the Company and a thirty (30) day opportunity to cure; (iii) knowing acts of dishonesty which materially adversely affect the Employer; (iv) indictment for a felony or crime involving moral turpitude, fraud, embezzlement or misrepresentation. In the event that this Agreement is terminated pursuant to this subsection (B), the Employee forfeits and shall not be entitled to the Severance Package, or other benefits or bonus of any kind whatsoever for any period after the Termination Date set forth in the notice given by the Employer to the Employee.

C. Disability.

(a) If the Employee shall be disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions under this Agreement, the Employer may remove the Employee from any responsibilities and/or reassign the Employee to another position with the Employer during the period of such disability. If the period of disability extends for more than six (6) months, the Employer may terminate the Employee's employment without further liability on the part of the Employer, except that the Employee shall be entitled to the Severance Package. The Employer may elect, at its sole discretion, to purchase a disability insurance package for the Employee. In the event that the Employer so elects to purchase a disability insurance package and the Employee subsequently becomes entitled to payments of the disability insurance benefit, any payments pursuant to the Severance Package, as defined in this Section 15, or payments of salary by the Employer will be reduced by the amount of the disability insurance benefit payments received by the Employee.

(b) If any question shall arise as to whether during any period the Employee is disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions, the Employee may, and at the request of the Employer shall, submit to the Employer a certification in reasonable detail by a physician selected by the Employer, to whom the Employee or the Employee's guardian has no reasonable objection, as to whether the Employee is so disabled or how long such disability is expected to continue, and such certification shall, for the purposes of this Agreement, be conclusive of the issue. The Employee shall cooperate with any reasonable request of the physician in connection with such certification. If such question shall arise and the Employee shall fail to submit such certification,

8

the Employer's determination of such issue shall be binding on the Employee. Nothing in this Section 15(c) shall be construed to waive the Employee's rights, if any, under existing law including, without limitation, the Family and Medical Leave Act of 1993, 29 U.S.C. 2601, et seq. and the Americans with Disabilities Act, 42 U.S.C. 12101 et seq.

D. Death or Retirement. The Employee's employment under this Agreement will be deemed to have terminated without further liability on the part of the Employer if the Employee dies or retires.

E. Certain Termination Benefits. Unless otherwise specifically provided in this Agreement or otherwise required by law, all compensation and benefits payable to the Employee under this Agreement shall terminate on the date of termination of the Employee's employment under this Agreement.

F. No Right to Continuing Employment. The Employee agrees that nothing contained in this Agreement shall be construed to give the Employee a right to continuing employment beyond the Termination Date.

16. Litigation and Regulatory Cooperation. During and after the Employee's employment, the Employee shall cooperate fully with the Employer in the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Employer which relate to events or occurrences that transpired while the Employee was employed by the Employer. The Employee's full cooperation in connection with such claims or actions shall include, but not be limited to, being available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Employer at mutually convenient times. During and after the Employee's employment, the Employee also shall cooperate fully with the Employer in connection with any investigation or review of any federal, state or local regulatory authority as any such investigation or review relates to events or occurrences that transpired while the Employee was employed by the Employer. The Employer shall reimburse the Employee for any reasonable out-of-pocket expenses incurred in connection with the Employee's performance of obligations pursuant to this
Section 16.

17. Injunction. The Employee agrees that it would be difficult to measure any damages caused to the Employer which might result from any breach by the Employee of the promises set forth in Section 8, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Employee agrees that if the Employee breaches, or proposes to breach, any portion of this Agreement, the Employer shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate preliminary equitable relief to restrain any such breach without showing or proving any actual damage to the Employer.

18. No Assignment. The Employee acknowledges that the services to be rendered by him pursuant to this Agreement are unique. Accordingly, the Employee shall not assign any of his rights or delegate any of his duties or obligations under this Agreement.

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19. Severability. Subject only to the reformation of time, geographical and occupational limitations as set forth in Section 20 hereof, all of the terms and provisions contained in this Agreement are severable and, in the event that any portion or provision of this Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be deemed unenforceable or invalid by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or provision in circumstances other than those as to which it is so declared unenforceable or invalid, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

20. Reformation of Time Geographical and Occupational Limitations. In the event that any provision in this Agreement is held to be unenforceable by a court of competent jurisdiction because it exceeds the maximum time, geographical or occupational limitations permitted by applicable law, then such provision(s) shall be and hereby are reformed to the maximum time, geographical and occupational limitations as may be permitted by applicable law.

21. Specific Performance. Both parties recognize that the services to be rendered under this Agreement by the Employee are special, unique and of an extraordinary character, and that in the event of breach by the Employee of the terms or conditions of this Agreement to be performed by him, the Employer shall be entitled, if it so elects, to institute and prosecute proceedings in any court of competent jurisdiction, either at law or in equity, to obtain damages for any breach of this Agreement to enforce the specific performance thereof by the Employee, or to enjoin the Employee from engaging in such activity, but nothing contained herein shall be construed to prevent such other remedy in the courts, in case of any breach of this Agreement by the Employee, as the Employer may elect to invoke.

22. Massachusetts Law: Choice of Forum. This Agreement shall be governed, construed and interpreted by, and in accordance with, the laws of the Commonwealth of Massachusetts, without reference to its principles of conflicts of laws. Any actions concerning enforcement of this Agreement or in any way relating to the subject matter of this Agreement shall be litigated only in Massachusetts state or federal courts of proper jurisdiction and venue. Each party hereto expressly agrees to submit to such jurisdiction and venue for the purposes of this Agreement. Notwithstanding the foregoing, the Employer may seek to enforce the Employee's covenants described in Sections 6, 7, 8 and 9 hereof in any jurisdiction and venue in which the Employee then resides, breaches or threatens to breach such covenants.

23. Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto, and replaces all prior agreements, promises, representations and understandings between the Employer and the Employee whatsoever concerning the limited subject matter hereof (other than the Stock Plan and any related Stock Option Agreement entered into between the Employer and the Employee). There are no other agreements, conditions or representations, oral or written, express or implied, which form the basis for this Agreement.

24. Assignment; Successors and Assigns, Etc. Neither the Employer nor the Employee may make any assignment of this Agreement or any interest herein, by operation of

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law or otherwise, without the prior written consent of the other party; provided, however, that the Employer may assign its rights under this Agreement without the consent of the Employee in the event that the Employer shall effect a reorganization, consolidate with or merge into any other corporation, partnership, organization or other entity, or transfer all or substantially all of its properties or assets to any other corporation, partnership, organization or other entity. This Agreement shall inure to the benefit of and be binding upon the Employer and the Employee, their respective successors, executors, administrators, heirs and permitted assigns.

25. Modification. No waiver or modification of this Agreement or of any covenant, condition, or limitation contained herein shall be valid unless in a writing of subsequent date hereto and duly executed by the party to be charged therewith and no evidence of any waiver or modification shall be offered or received in evidence in any proceeding, arbitration, or litigation between the parties hereto arising out of or affecting this Agreement, or the rights or obligations of the parties hereunder, unless such waiver or modification is in writing, duly executed as aforesaid. The parties further agree that the provisions of this Section may not be waived except as herein set forth.

26. Section Headings. The section headings contained in this Agreement are for convenience only, and shall in no manner be construed as part of this Agreement.

27. Waiver of Breach. The waiver by either party of a breach or violation of any provision of this Agreement shall not operate as, or be construed to be, a waiver of any subsequent breach thereof.

28. Notices. Any and all notices required or permitted to be given under this Agreement shall be sufficient if furnished in writing, sent by certified or registered mail, return receipt requested to the party's address set forth in the Prologue of this Agreement, or to such other address as such party may specify in writing.

29. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document.

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IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year here above first written.

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By: /s/ John E. McCray
    -----------------------------
Name: John E. McCray
Title: COO

/s/ Nicholas Borys
---------------------------------
Nicholas Borys, M.D.

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SCHEDULE A
(As Amended from time to time pursuant to Paragraph 3(a))

Base Compensation

Annual Rate of Base Compensation  Agreed to by Employee  Agreed to by Employer
--------------------------------  ---------------------  ---------------------
$200,000.00                       [ILLEGIBLE]            [ILLEGIBLE]

(Must be initialed by both parties each time amended to be effective.)

Exhibit A - Incentive Stock Option Grant

13

EXHIBIT 10.11

EMPLOYMENT AGREEMENT
(for Robert E. Gallahue Jr.)

EMPLOYMENT AGREEMENT (this "Agreement") dated as of July 1, 2005 (the "Effective Date"), by and between Molecular Insight Pharmaceuticals, Inc., a Massachusetts corporation having its principal place of business at 160 Second Street, Cambridge, Massachusetts 02142 (the "Employer"), and Robert E. Gallahue Jr., 544 Sharpners Pond Road, North Andover, Massachusetts 01845 (the "Employee").

WITNESSETH:

WHEREAS, the Employer is engaged in the business of developing and marketing imaging pharmaceuticals which detect human disease; and

WHEREAS, the Employee possesses the experience necessary in administration and general and active supervision and direction of the daily operations of a biopharmaceutical business in order to fulfill the responsibilities as Chief Financial Officer of the Employer; and

WHEREAS, the Employer desires to employ the Employee, and the Employee desires to be employed by the Employer, all in accordance with the terms and provisions of this Agreement.

NOW, THEREFORE, in consideration of the covenants and promises hereinafter contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Employer and the Employee represent, covenant and agree as follows:

1. Employment. The Employer hereby employs the Employee to serve as Chief Financial Officer of the Employer in accordance with the terms and provisions of this Agreement, and the Employee hereby accepts such employment with the Employer.

2. Term. The term of this Agreement shall commence on the Effective Date and shall continue until this Agreement is terminated as hereinafter provided.

3. Compensation. As compensation for all services rendered by the Employee to the Employer pursuant to this Agreement, the Employer shall pay to the Employee the following amounts during the term of this Agreement:

(a) Base Compensation. The Employer shall pay to the Employee base compensation at no less than the rate set forth on Schedule A attached hereto and herein incorporated by reference (the "Base Compensation"). The Base Compensation shall be payable pursuant to the Employer's standard payroll practices, except as otherwise noted on Schedule A. The Base Compensation shall be reviewed by the compensation committee of the Board of the Employer annually and increases in the Base Compensation, if any, shall be determined in the Employer's sole discretion and evidenced by the updating and initialing of Schedule A by both parties hereto.


(b) Incentive Bonus. In addition to the Base Compensation, the Employee may be eligible to receive an annual fiscal year incentive bonus with a maximum annual amount of up to thirty percent (30%) of the Employee's then current Base Compensation (the "Incentive Bonus"). The amount and timing of payment of the Incentive Bonus shall be determined by the Board, in its sole discretion, and will be based both upon accomplishment of goals provided to the Employee by the Chairman and Chief Executive Officer from time to time and the achievement of specific corporate milestones. The Board may elect to award the Incentive Bonus to the Employee in cash or in the Employer's capital stock (at its then-current fair market value).

4. Vacation and Employee Benefits.

(a) Vacation. The Employee shall be entitled to paid vacation equal to four weeks annually. Vacation shall be taken at such times so as not to interfere with the proper operation of the Employer's business.

(b) Benefits Generally. The Employee shall be entitled to receive and participate in such employee benefits as the Employer shall from time to time determine to provide to its executives generally.

5. Stock Incentives.

(a) Options. Pursuant to the provisions of the Company's 1997 Stock Option Plan, as may be amended from time to time (the "Plan"), and subject to the approval by the Employer's Board of Directors, the Employer will grant to the Employee an option to purchase 875,000 shares of its Common Stock ($.01 par value) (the "Optioned Shares") at an exercise price equal to the fair market value of the Employer's Common Stock as of the date of grant, which is currently $0.20 per share. Of the Optioned Shares, options for 475,000 shares shall vest in four equal installments on the anniversary of the Employee's date of hire in accordance with and subject to all the terms and conditions of the Plan and a separate stock option agreement. Further, options for the remaining 400,000 shares shall vest on the fourth anniversary of the Employee's date of hire, in accordance with and subject to all the terms and conditions of the Plan and a separate stock option agreement; provided, that such shares may receive acceleration of vesting, subject to the determination of the Employer's Board of Directors, in its sole discretion, upon the successful achievement of performance goals to be mutually agreed to by the Employee and the Employer. In the event of a Change of Control (as defined below), all of the unvested Optioned Shares immediately shall vest, provided that the Employee is still employed by the Employer on the date of such Change of Control.

(b) Change of Control. For purposes of this Agreement "Change of Control" shall mean the occurrence of one or more of the following events:

(i) any "person" (as such term is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) becomes a "beneficial owner" (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the

2

Employer, any trustee or other fiduciary holding securities under an employee benefit plan of the Employer, or any corporation owned, directly or indirectly, by the stockholders of the Employer, in substantially the same proportions as their ownership of stock of the Employer), or any or group of persons acting in concert becomes a beneficial owner, directly or indirectly, of securities of the Employer, representing more than fifty percent (50%) of the combined voting power or fully diluted equity interest of the Employer's then outstanding equity securities, except as a result of a financing transaction where all proceeds are received directly by the Company that is not intended as a sale of the business of the Employer; or

(ii) the stockholders of the Employer approve a merger or consolidation of the Employer with any other corporation or other entity, other than (A) a merger or consolidation which would result in the equity securities of the Employer outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into equity securities of the surviving entity) fifty percent (50%) or more of the outstanding equity interest of the Employer or such surviving entity outstanding immediately after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Employer (or similar transaction) in which no "person" (as hereinabove defined) other than Employee acquires more than fifty percent (50%) of the equity interest of the Employer's then outstanding securities; or

(iii) the stockholders of the Employer approve a plan of complete liquidation of the Employer or an agreement for the sale or disposition by the Employer of all or substantially all of the Employer's assets.

6. Description of Duties. During the term of this Agreement, the Employee shall be the Chief Financial Officer and shall:

(a) devote on a full time basis all necessary time, best efforts, professional skills, attention and energies to the fulfillment of the regulatory and quality assurance duties customarily associated with such position and the accomplishment of the goals provided by the Chairman and Chief Executive Officer of the Employer to the Employee from time to time; and

(b) act in accordance herewith, and in all accounts be responsible and responsive to, the Board of Directors and Chairman and CEO of Employer.

7. General Services. During the term of this Agreement, the Employee shall:

(a) observe the Employer's policies and standards of conduct, as well as customary standards of business conduct, including any standards prescribed by law or regulation;

(b) perform his duties hereunder in a manner that preserves and protects the Employer's business reputation; and

(c) do all things and render such services as may be necessary or beneficial in carrying out any of the foregoing.

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8. Non-Disclosure of Proprietary or Confidential Information and Confidential Communications. For the purposes of this Section 8, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. The Employee recognizes and acknowledges that the marketing plans and business strategy, the particular needs and application of such customers for diagnostic imaging techniques, the Employer's proprietary computer software programs, trade secrets and any other confidential and proprietary information concerning the business or affairs of the Employer (including but not limited to marketing and business plans and strategies, research protocols, procedures data, results, and cost information)
(hereinafter collectively referred to as the "Confidential Information") constitute a valuable, proprietary, special and unique asset of the Employer's business. The Employee further recognizes and acknowledges that any communications, whether written, oral or otherwise, that the Employer or any of the Employer's employees has with the Employer's existing or prospective customers and clients and affiliated research institutions and scientists regarding the Employer's business are extremely confidential (hereinafter the "Confidential Communications"). The term Confidential Information shall exclude any information that has been made public through no fault of the Employee.

The Employee shall not, for any reason whatsoever, during or after the termination of his employment with the Employer, use, disclose or allow access to, for his own benefit or for that of another, the Confidential Information or the Confidential Communications (or any part thereof) to any person, firm, corporation, association or other entity for any reason or for any purpose whatsoever.

In the event of a breach or threatened breach by the Employee of the provisions of this Section, the Employer shall be entitled to an injunction restraining the Employee from so using, disclosing or allowing access to, in whole or in part, the Confidential Information and the Confidential Communications or from rendering any services to any person, firm, corporation, association or other entity to whom the Confidential Information or the Confidential Communications, in whole or in part, have been disclosed or are threatened to be disclosed. Nothing herein shall be construed as prohibiting the Employer from pursuing any other remedies available to the Employer for such breach or threatened breach, including, but not limited to, the recovery of damages and reasonable attorneys' fees from the Employee. In the event that the Employer seeks an injunction against the Employee and is unsuccessful, the Employer will reimburse the Employee his attorney's fees and expenses.

Upon termination of this Agreement by either party for any reason, the Employee shall return to the Employer any of the Confidential Information, Confidential Communications, charts, company literature, reports, Employer credit cards or other proprietary materials of the Employer then in the Employee's possession and all other materials of the Employer which the Board of Directors of the Employer requests the Employee to so return.

This Section shall in all respects survive any termination of this Agreement and shall remain in full force and effect thereafter. In the event that any provision of this Section 8 shall conflict with any term or condition of any other confidentiality agreement between the Employer

4

and the Employee, then the more restrictive provision shall be deemed to apply in order to accomplish the purposes of this Section 8 and such other agreements, that being to protect the Employer's Confidential Information and Confidential Communications.

In the event of the Employee's breach of this Section 8, the Employee shall immediately and irrevocably forfeit future payments under the Severance Package as hereinafter defined in Section 15. Nothing in this paragraph shall be construed to limit or cap the Employer's damages in the event of a breach of this Section 8.

9. Covenant Not to Compete: Non-solicitation of Employees and Customers. For the purposes of this Section 9, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. The Employee agrees that while employed by the Employer and for a continuous period of one (1) year following the date of the termination of his employment with the Employer either voluntarily without "Good Reason" or involuntarily by the Company for "cause" (the "Restricted Period"), he shall not (without the express prior written consent of the Board of Directors of the Employer), directly or indirectly, compete with the Employer. In construing the foregoing prohibition, the Employee shall be deemed to be competing with the Employer if he shall become self-employed in, or accept employment with, consult with, render services to or become associated with, own, manage, operate, join, control, or participate in the ownership, management, operation, or control of, or be connected in any material manner with, or directly or indirectly enter into the employment of, or make a substantial investment in (other than as a holder of not more than 3% of the total outstanding stock of a publicly held company), any corporation, partnership, proprietorship or other type of business organization or entity which engages in, any business (a "Competing Business") involving the sale, distribution, development or research concerning diagnostic molecular imaging of the myocardium or other lines of the Employer which directly and materially competes with the product lines in or with which the Employer is then currently involved.

The Employee further agrees that, during his employment with the Employer and during the Restricted Period, he shall not solicit any of the Employer's employees, existing customers or prospective customers (of which the Employee is then currently aware), affiliated research institutions or scientists, on behalf of himself or any Competing Business.

This Section 9 shall in all respects survive any termination of this Agreement and shall remain in full force and effect during the Restricted Period.

In the event of the Employee's breach of this Section 9 during the Restricted Period, the Employee shall immediately and irrevocably forfeit future payments to the Employee under the Severance Package as hereinafter defined in
Section 15.

10. Assignment of Rights. Any and all information, data, inventions, discoveries, materials, notebooks and other work product which the Employee conceives, develops or acquires during his employment with the Employer, which directly or indirectly relates to work performed for the Employer, shall be the sole and exclusive property of the Employer. The

5

Employee shall promptly execute any and all documents necessary and take such further actions as the Employer may deem necessary to assign any and all of the Employee's right, title and interest in such property to the Employer.

11. Intellectual Property. For the purposes of this Section 11, the term "Employer" shall include, and the protections granted the Employer hereunder shall extend to, ATP Therapeutics, Inc., Biostream Therapeutics, Inc. (f/k/a Zebra Pharmaceuticals, Inc.), and any other entities now or hereinafter affiliated, acquired or created by the Employer. During the Employee's employment at the Employer, the Employee shall promptly assist with and execute any and all applications, assignments or other documents which an officer or director of the Employer shall deem necessary or useful in order to obtain and maintain patent, trademark or other intellectual property protection for the Employer's products or services. After the termination date of his employment with the Employer, the Employee shall use reasonable efforts to assist the Employer on intellectual property matters as they relate to his employment, and the Employer shall reasonably compensate the Executive for his time and expense.

12. Documents, Records, etc. All documents, records, data, apparatus, equipment and other physical property, whether or not pertaining to Confidential Information, which are furnished to the Employee by the Employer or are produced by the Employee in connection with the Employee's employment will be and remain the sole property of the Employer. The Employee will return to the Employer all such materials and property as and when requested by the Employer. In any event, and whether or not the Employer so specifically requests, the Employee will return all such materials and property immediately upon termination of the Employee's employment for any reason. The Employee will not retain any such material or property or any copies thereof after such termination.

13. Third-Party Agreements and Rights. The Employee hereby confirms that he is not bound by the terms of any agreement with any previous employer or other party which restricts in any way the Employee's use or disclosure of information or the Employee's engagement in any business. The Employee represents to the Employer that the Employee's execution of this Agreement, the Employee's employment with the Employer and the performance of the Employee's proposed duties for the Employer will not violate any obligations the Employee may have to any such previous employer or other party. In the Employee's work for the Employer, the Employee will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Employee will not bring to the premises of the Employer any copies or other tangible embodiments of nonpublic information belonging to or obtained from any such previous employer or other party.

14. Restricted Activities. During the term of this Agreement, the Employee shall not engage in any business activities or ventures outside of the business activities of the Employer without the express prior written consent of the Employer's Board; provided, however, that nothing in this Agreement shall be construed as preventing the Employee from:

(a) investing the Employee's assets in any company or other entity in a manner not prohibited by Section 9 and in such form or manner as shall not require any material

6

activities on the Employee's part in connection with the operations or affairs of the companies or other entities in which such investments are made; or

(b) engaging in religious, charitable or other community or non-profit activities that do not impair the Employee's ability to fulfill the Employee's duties and responsibilities under this Agreement.

15. Termination.

A. Termination Without Cause.

(a) Notwithstanding anything herein to the contrary, this Agreement may be terminated by either the Employer (by act of its Board) or the Employee, at any time, without cause; provided, however, that the party desirous of terminating this Agreement shall give the other party prior written notice of such termination. In either event, the Employer may determine the Employee's final day of employment hereunder. The date specified in any notice of termination as the Employee's final day of employment shall be referred to herein as the Termination Date.

(b) In the event that the Employer (by act of its Board) terminates this Agreement without cause pursuant to this subsection (A) of
Section 15, or the Employee voluntarily resigns for Good Reason (defined below), then the Employee shall be entitled to receive severance pay equal to the Base Compensation rate as of the Termination Date in equal monthly installments for a period of twelve (12) months (the "Post-Termination Period") from the Termination Date (the "Severance Package"). The Employer also agrees to make available to the Employee, as part of the Severance Package, continuation of group health plan benefits to the extent authorized by and consistent with 29 U.S.C. Section 1161 et seq. (commonly known as "COBRA"), and any other benefits the Employee is receiving as of the Termination Date with the cost of the regular premium for such benefits shared in the same relative proportion by the Employer and the Employee as in effect on the Termination Date.

(c) For purposes of this Agreement, "Good Reason" shall mean:

(i) a reduction of the Employee's Base Compensation other than a reduction approved by the Employee in writing; or

(ii) a significant change in the Employee's title and/or responsibilities which constitutes, when compared to the Employee's title and/or responsibilities as of the Effective Date, a demotion; or

(iii) the relocation of the offices at which the Employee is principally employed as of the Effective Date to a location more than fifty (50) miles from such office, which relocation is not approved by the Employee.

(d) In the event of the Employee's voluntary termination, then the Employee shall, at the request of the CEO of the Employer, continue as an employee of the

7

Employer for an additional thirty (30) day period after the Termination Date for the purpose of assisting the Employer in locating and training a suitable replacement for the Employee. During such additional period, the Employee shall be entitled to full compensation and benefits and the Employee shall continue to be bound by all of the terms contained herein. Any such extended term shall extend the Post-Termination Period by an equal number of days.

B. Termination With Cause.

(a) The Employer (by act of its Board, CEO or President) may terminate this Agreement immediately for "cause" by giving written notice to the Employee. As used herein, the term "cause" shall mean the Employee's: (i) use of illegal drugs which impairs the Employee's performance for the Employer; (ii) willful or repeated failure or refusal to perform his duties hereunder after written notice from the Company and a thirty (30) day opportunity to cure; (iii) acts of dishonesty which materially adversely affect the Employer; (iv) indictment for a felony or other crime, or (v) commission of acts involving moral turpitude, fraud, embezzlement or misrepresentation. In the event that this Agreement is terminated pursuant to this subsection (B), the Employee forfeits and shall not be entitled to the Severance Package, or other benefits or bonus of any kind whatsoever for any period after the Termination Date set forth in the notice given by the Employer to the Employee.

C. Disability.

(a) If the Employee shall be disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions under this Agreement, the Employer may remove the Employee from any responsibilities and/or reassign the Employee to another position with the Employer during the period of such disability. If the period of disability extends for more than six (6) months, the Employer may terminate the Employee's employment without further liability on the part of the Employer, except that the Employee shall be entitled to the Severance Package. The Employer may elect, at its sole discretion, to purchase a disability insurance package for the Employee. In the event that the Employer so elects to purchase a disability insurance package and the Employee subsequently becomes entitled to payments of the disability insurance benefit, any payments pursuant to the Severance Package, as defined in this Section 15, or payments of salary by the Employer will be reduced by the amount of the disability insurance benefit payments received by the Employee.

(b) If any question shall arise as to whether during any period the Employee is disabled so as to be unable to perform the essential functions of the Employee's then existing position or positions, the Employee may, and at the request of the Employer shall, submit to the Employer a certification in reasonable detail by a physician selected by the Employer, to whom the Employee or the Employee's guardian has no reasonable objection, as to whether the Employee is so disabled or how long such disability is expected to continue, and such certification shall, for the purposes of this Agreement, be conclusive of the issue. The Employee shall cooperate with any reasonable request of the physician in connection with such certification. If such question shall arise and the Employee shall fail to submit such certification, the Employer's determination of such issue shall be binding on the Employee. Nothing in this
Section 15(c) shall be construed to waive the Employee's rights, if any, under existing law

8

including, without limitation, the Family and Medical Leave Act of 1993, 29 U.S.C. 2601, et seq. and the Americans with Disabilities Act, 42 U.S.C. 12101 et seq.

D. Death or Retirement. The Employee's employment under this Agreement will be deemed to have terminated without further liability on the part of the Employer if the Employee dies or retires.

E. Certain Termination Benefits. Unless otherwise specifically provided in this Agreement or otherwise required by law, all compensation and benefits payable to the Employee under this Agreement shall terminate on the date of termination of the Employee's employment under this Agreement.

F. No Right to Continuing Employment. The Employee agrees that nothing contained in this Agreement shall be construed to give the Employee a right to continuing employment beyond the Termination Date.

16. Litigation and Regulatory Cooperation. During and after the Employee's employment, the Employee shall cooperate fully with the Employer in the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Employer which relate to events or occurrences that transpired while the Employee was employed by the Employer. The Employee's full cooperation in connection with such claims or actions shall include, but not be limited to, being available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Employer at mutually convenient times. During and after the Employee's employment, the Employee also shall cooperate fully with the Employer in connection with any investigation or review of any federal, state or local regulatory authority as any such investigation or review relates to events or occurrences that transpired while the Employee was employed by the Employer. The Employer shall reimburse the Employee for any reasonable out-of-pocket expenses incurred in connection with the Employee's performance of obligations pursuant to this
Section 16.

17. Injunction. The Employee agrees that it would be difficult to measure any damages caused to the Employer which might result from any breach by the Employee of the promises set forth in Sections 8, 9 or 10, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Employee agrees that if the Employee breaches, or proposes to breach, Sections 8, 9 or 10 of this Agreement, the Employer shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate preliminary equitable relief to restrain any such breach without showing or proving any actual damage to the Employer.

18. No Assignment. The Employee acknowledges that the services to be rendered by him pursuant to this Agreement are unique. Accordingly, the Employee shall not assign any of his rights or delegate any of his duties or obligations under this Agreement.

19. Severability. Subject only to the reformation of time, geographical and occupational limitations as set forth in Section 20 hereof, all of the terms and provisions contained in this Agreement are severable and, in the event that any portion or provision of this

9

Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be deemed unenforceable or invalid by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or provision in circumstances other than those as to which it is so declared unenforceable or invalid, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

20. Reformation of Time Geographical and Occupational Limitations. In the event that any provision in this Agreement is held to be unenforceable by a court of competent jurisdiction because it exceeds the maximum time, geographical or occupational limitations permitted by applicable law, then such provision(s) shall be and hereby are reformed to the maximum time, geographical and occupational limitations as may be permitted by applicable law.

21. Massachusetts Law: Choice of Forum. This Agreement shall be governed, construed and interpreted by, and in accordance with, the laws of the Commonwealth of Massachusetts, without reference to its principles of conflicts of laws. Any actions concerning enforcement of this Agreement or in any way relating to the subject matter of this Agreement shall be litigated only in Massachusetts state or federal courts of proper jurisdiction and venue. Each party hereto expressly agrees to submit to such jurisdiction and venue for the purposes of this Agreement. Notwithstanding the foregoing, the Employer may seek to enforce the Employee's covenants described in Sections 8,9 and 10 hereof in any jurisdiction and venue in which the Employee then resides, breaches or threatens to breach such covenants.

22. Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto, and replaces all prior agreements, promises, representations and understandings between the Employer and the Employee whatsoever concerning the limited subject matter hereof (other than the Stock Plan and any related Stock Option Agreement entered into between the Employer and the Employee). There are no other agreements, conditions or representations, oral or written, express or implied, which form the basis for this Agreement.

23. Modification. No waiver or modification of this Agreement or of any covenant, condition, or limitation contained herein shall be valid unless in a writing of subsequent date hereto and duly executed by the party to be charged therewith.

24. Section Headings. The section headings contained in this Agreement are for convenience only, and shall in no manner be construed as part of this Agreement.

25. Waiver of Breach. The waiver by either party of a breach or violation of any provision of this Agreement shall not operate as, or be construed to be, a waiver of any subsequent breach thereof.

26. Notices. Any and all notices required or permitted to be given under this Agreement shall be sufficient if furnished in writing, sent by certified or registered mail, return receipt requested to the party's address set forth in the Prologue of this Agreement. Either party may furnish the other party with a different address in writing pursuant to this Section 26.

10

27. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document.

11

IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year here above first written.

MOLECULAR INSIGHT PHARMACEUTICALS, INC.

By:_______________________
Name: David S. Barlow
Title: Chairman & CEO

/s/ Robert E. Gallahue Jr.
--------------------------
Robert E. Gallahue Jr.

12

SCHEDULE A
(As Amended from time to time pursuant to Paragraph 3(a))

Base Compensation

Annual Rate of Base     Agreed to by Employee           Agreed to by Employer
   Compensation
$ 225,000.00

(Must be initialed by both parties each time amended to be effective.)

Exhibit A - Incentive Stock Option Grant

13

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.12

LICENSE AGREEMENT

This Agreement made as of the 25th day of October 1999, by and between Nihon Medi-Physics Co. Ltd. (the "Licensor") and Biostream, Inc. (the "Licensee"),

WITNESSETH:

WHEREAS Licensor conducted various clinical trials in Japan and has been selling its BMIPP product, Cardiodine, for use in diagnosing myocardial ischemia and infarction and as a result has collected and possesses substantial information, know-how and data from such trials;

WHEREAS Licensee has a patent on certain BMIPP product technology in the United States;

WHEREAS Licensee desires to utilize the Confidential Information (as defined below) to [***********************************************************] and production capability with respect to such technology in the United States; and

WHEREAS Licensee wishes to obtain non-exclusive license to use the Confidential Information pursuant to the terms and conditions of this Agreement;

NOW, THEREFORE, in consideration of the mutual promises herein contained, and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties agree as follows:

I. Definitions

A. "Additional Indication" shall mean the second or any subsequent indication after the First Indication for the use of MyoImage for which Licensee receives FDA approval.

B. "BMIPP" shall mean Beta-methyl-iodo-phenyl-pentadecanoic acid, labeled with Iodine-123.

C. "Cardiodine" shall mean Licensors BMIPP product.

D. "Confidential Information" shall mean all data submitted by Licensor to the Ministry of Health and Welfare as of the date of this Agreement in connection with Licensor's application for approval of Cardiodine.

E. "FDA" shall mean the United States Food and Drug Administration.

F. "First Indication" shall mean Licensee's use of MyoImage to diagnose myocardial ischemia and infarction.

G. "MyoImage" shall mean Licensee's BMIPP product.


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

H. "Net Sales" shall mean all amounts actually received, directly or indirectly, in respect of sales of MyoImage in the Territory by Licensee, affiliates of Licensee, or any third parties to which Licensee may license, sell or otherwise transfer or dispose of its rights to make or sell MyoImage in the Territory less the following items:

(1) customary trade, quantity, cash and prompt payment discounts and non-affiliated brokers' or agents' commissions actually allowed and taken;

(2) amounts repaid or credited by reason of rejection or return;

(3) taxes levied on and/or other governmental charges made as to production, sale, transportation, delivery or use and paid or collected by or on behalf of Licensee;

(4) costs of insurance and packing and charges for delivery or transportation; and

(5) rebates and price reductions or adjustments required by a law or regulation.

I. "Technology" shall mean BMIPP, Cardiodine and MyoImage collectively.

J. "Territory" shall mean North America.

II. Licenses and Rights

A. During the term of this Agreement, and subject to all the terms and conditions stated herein, Licensor hereby grants Licensee the
[*************]right (the "License") to use the Confidential Information solely for and in connection with [*************************], the marketing of MyoImage, the conduct of all aspects of clinical trials of MyoImage, any
[**********************] regarding MyoImage and the formulation, production and distribution of MyoImage within, the Territory including copying, translating and distributing the Confidential Information in the Territory.

B. Licensee shall be responsible at its sole cost and expense for translating the Confidential Information into English. Licensor will cause its employees to respond by telephone or in writing to inquiries Licensee may have regarding the Confidential Information, provided that Licensor's employees shall not he required to spend more than 3 employee working days in the aggregate in assisting Licensee in this manner.

III. Warranties and Indemnification

A. Licensor represents and warrants to Licensee as follows:

1. Licensor has the right, power and authority to enter into this Agreement and grant the rights and undertake the obligations specified herein.

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

2. To the best knowledge of Licensor, the information contained in the Confidential Information was accurate as of the date of its submission to the Ministry of Health and Welfare. No representation is made as to the validity or ownership of any intellectual or industrial property rights inherent in the Confidential Information.

3. No authorization, consent or approval of, or filing with or notice to any governmental or public body or authority, is necessary for the execution, delivery and performance of this Agreement by Licensor.

4. Neither the execution, delivery and performance of this Agreement by Licensor nor Licensee's use of the Confidential Information pursuant to this Agreement will conflict with or result in any violation or breach of any agreement, instrument license, judgment, order, decree, statute, ordinance, rule or regulation to which Licensor is a party or by which it is bound or which is applicable to it or any of its assets.

IV. Royalties

A. Amount of Royalties Owing

1. In exchange for the License granted hereunder, Licensee shall pay to Licensor the following royalties with respect to Net Sales for the First Indication:

a. If Licensor provides Licensee with the Confidential Information, and Licensee is able to [******************** *****************************************************] in connection with the approval of the use of MyoImage for the First Indication: [*]%

b. With respect to the use of MyoImage for the First Indication, if the use of the Confidential Information results in Licensee's being allowed by the FDA to [**** *******************************************************] [*]%

c. With respect to the use of MyoImage for the First Indication, if the use of the Confidential Information results in Licensee's being allowed by the FDA to [**** *******************************************************] [*]%

d. With respect to the use of MyoImage for the First Indication, if the use of the Confidential Information results in Licensee's being allowed by the FDA to [**** ****************************************************** ****************] [*]%

e. With respect to the use of MyoImage for the First Indication, if the use of the Confidential Information results in Licensee's being allowed by the FDA to [**** ****************************************************** ****************] [*]%

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

f. With respect to the use of MyoImage for the First Indication, if the use of the Confidential Information results in Licensee's being allowed by the FDA to [********************************** *************************************************************** *******************************] [*]%

A Phase II or Phase III trial will be deemed to be "limited" if the FDA specifies in writing that less than the usual standard Phase II or Phase III, as the case may be, trial will be required. Within 30 days after Licensee receives FDA approval to commercially market and sell MyoImage, Licensee shall deliver to Licensor a statement [********************************************************** *****************************], the royalty that will be due with respect to ensuing Net Sales as a result and copies of all written communications from the FDA with respect to the approval process.

2. Licensee shall also pay to Licensor a royalty of [*]% of Net Sales of MyoImage for any Additional Indication.

B. Time and Method of Payment

1. Following Licensee's first sale of MyoImage, Licensee shall make written reports and royalty payments quarterly, within 30 days following each March 31, June 30, September 30, and each December 31, or at such other times as the parties may from time to time agree. Each report shall state the number, basis of calculation, description and aggregate Net Sales of MyoImage during the completed quarter for the First Indication and for each Additional Indication and resulting calculation of royalty payments due Licensor for such completed quarter.

Licensee shall, as a condition of entering into any license or other transfer or disposition of rights to make or sell MyoImage to a third party require that such third party maintain records of sales and other information equivalent to the records required to be maintained by Licensee hereunder, which records shall be made available to Licensor for the purposes of calculating and confirming royalty payments hereunder

2. All royalty payments shall be in Japanese yen converted from US dollars at the prevailing exchange rate and made by wire transfer pursuant to such instructions as may be specified by Licensor from time to time.

3. If any government or political subdivision requires Licensee to withhold any tax or other amount with respect to the payment of royalties hereunder, Licensee shall be deemed to have paid the full amount of the royalties to Licensor and shall not be required to increase any royalty payments to Licensor to compensate for such withholdings.

4. Licensee shall keep records showing all operations that are subject to this Agreement and shall maintain such results for a period of three years following the expiration or earlier termination of this Agreement. Upon reasonable notice to Licensee, Licensor shall have the right to inspect, or to cause an accountant or other authorized agent or agents to inspect, Licensee's

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records to verify that Licensee has paid all royalties owing to Licensor. The foregoing inspection rights shall survive the expiration or earlier termination of this Agreement for a period of three years. In the event that it is established in the course of an inspection that Licensee has been paying less than 95% of the royalties it is obliged to pay hereunder, in addition and without prejudice to any other remedy available to Licensor, Licensee shall reimburse Licensor for the cost of such inspection, Any confidential information disclosed to Licensor during any such inspection shall be held in confidence by Licensor, not used except in connection with the enforcement of this Agreement and not disclosed to any third parties. Licensor shall take all other actions reasonably necessary or advisable to protect and maintain Licensee's rights in such information. Any third party agents of Licensor to whom such confidential information is disclosed shall be required to enter written confidentiality or nondisclosure agreements reasonably satisfactory to Licensee with respect to Licensee's confidential information.

V. Confidential Information

A. Licensee acknowledges that all Confidential Information is a valuable asset of Licensor, the value of which would be substantially diminished or destroyed by unauthorized disclosure.

B. Licensee shall not disclose any Confidential Information to vendors, customers, or other persons except in connection with its use of the Confidential Information as provided herein (including filings with the FDA) without the prior written consent of Licensor.

C. Licensee shall enter into written confidentiality or nondisclosure agreements with Licensee's employees, with vendors to Licensee, and with anyone else to whom Confidential Information is disclosed.

D. Licensee shall take all other actions reasonably necessary or advisable to protect and maintain Licensor's rights in all Confidential Information. These actions shall include, without limitation:

1. Establishment and maintenance of reasonable security procedures at all of Licensee's locations at which Confidential Information is kept or used;

2. Informing Licensee's employees with access to Confidential Information that Confidential Information is confidential, proprietary and secret;

3. Informing Licensee's employees on a periodic basis of the importance of maintaining the secrecy of all Confidential Information; and

4. Such other actions as Licensee takes to protect its own confidential materials and such actions as Licensor may reasonably request to maintain the secrecy of all Confidential Information.

E. Any information, technical data or know-how that (a) is already in Licensee's possession at the time of its disclosure to Licensee, (b) is now or becomes a part of the public

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domain by virtue of a publication other than by or through the fault of Licensee or any of its agents or employees, (c) is rightfully received from a third party who has a right to disclose such information without restriction on disclosures and without breach of this agreement or (d) is independently developed by Licensee without use of Confidential Information shall not be deemed to be Confidential Information.

VI. Termination

A. The term of this Agreement shall be from the date hereof until such time as Licensee, its successors, affiliates, licensees and other transferees cease to sell or distribute MyoImage in the Territory.

B. This Agreement may be terminated (1) by mutual agreement; (2) by one party upon the occurrence of a material breach of contract by the other party; or (3) by one party upon bankruptcy, insolvency proceeding or similar event affecting the other party.

C. Each party hereto shall keep the other party informed of bona fide reason or similar incidents which come to its attention with regard to this Agreement, regardless of the origin of such report. Either party may rescind this Agreement, with consent from the other party, which consent shall not be unreasonably withheld, at any time prior to the official submission by the Licensee of the Confidential Information to the FDA, but only for a bona fide reason, which shall be limited to the definition below. A "bona fide reason" shall mean (1) the occurrence of materially adverse results or revelations concerning the use of Cardiodine that is likely to have an materially adverse effect on the outcome of the FDA approval process for MyoImage; or (2) the occurrence of materially adverse results during clinical trials of MyoImage; (3) any other circumstances that would cause public disclosure of this Agreement or the Confidential Information, that would have a materially adverse impact on either party or either party's reputation. In the event that the parties do not agree that an occurrence constitutes a bona fide reason, the parties will employ the dispute resolution process in Section VII. Each party agrees to promptly notify the other if a bona fide reason occurs.

D. If NMP requests rescission of this Agreement for a bona fide reason, Licensee shall be prohibited from utilizing and disclosing Confidential Information prior to receipt of the written judgement of the arbitrators.

E. Upon the expiration, termination, or rescission of this agreement pursuant to section VI, A, B, C, hereof Licensee shall have no further right and license to the Confidential Information, promptly return the Confidential Information to NMP and continue to observe the obligations of Section V with respect thereto.

VII. General

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A. This Agreement constitutes the entire agreement of the parties with respect to its subject matter, superseding all negotiations and prior agreements between them with respect thereto.

B. The failure of either party to enforce its rights or remedies under any part of this Agreement shall not waive its right to enforce the same part at a different time, or to enforce other parts of this Agreement.

C. In the event that any provision of this Agreement shall be determined to be unenforceable by any court of competent jurisdiction by reason of its extending for too great a period of time or over too large a geographic area or over too great a range of activities, it shall be interpreted to extend only over the maximum period of time, geographic area or range of activities as to which it may be enforceable.

D. If any provision of this Agreement shall be determined to be invalid, illegal or otherwise unenforceable by any court of competent jurisdiction, the validity, legality and enforceability of the other provisions of this Agreement shall not be affected thereby. Any invalid, illegal or unenforceable provision of this Agreement shall be severable, and after any such severance, all other provisions hereof shall remain in full force and effect.

E. The Agreement shall be binding upon the parties and their respective legal representatives, successors and assigns. Licensee may not assign its rights hereunder without the prior written consent of Licensor.

F. This Agreement may be executed in two or more counterparts, each of which shall be considered an original but all of which together shall constitute one and the same instrument.

G. Licensor and Licensee are independent contractors and are not, and shall not represent themselves as, principal and agent, partners or joint venturers.

H. This Agreement shall be governed by and construed and enforced in accordance with the substantive laws of Japan.

I. Any dispute arising out of, in connection with or in relation to any provision of this Agreement shall be settled in accordance with the then-existing Rules of Conciliation and Arbitration of the International Chamber of Commerce. The arbitration shall be conducted by three arbitrators, one selected by Licensee, one selected by Licensor, and the third selected by the first two arbitrators. The arbitration shall be held in Tokyo and the proceeding shall be conducted in Japanese if the party initiating the proceeding is Licensee, and in New York and in the English language if the party initiating the proceeding is Licensor. Any award or judgement shall be rendered by a majority of the arbitrators and shall be in writing stating the reasons therefor, and any award or judgement rendered may be entered in and shall be enforceable by any court of competent jurisdiction.

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J. Licensee agrees that press releases and other public announcements to be made by it with respect to this Agreement and the translation contemplated hereby shall be subject to the prior approval of Licensor.

K. If this Agreement is translated into another language before or after execution, this English language version shall remain the governing version of this Agreement.

L. Any notice required or permitted hereunder shall be considered as duly made and effective upon delivery if made in writing and delivered to the party for which it is intended at the following address or fax number:

If to Licensor:                                If to Licensee:
1-13-5 Kudankira.                              160 Second Street
Chiyoda-Ku, Tokyo                              Cambridge, MA 02142
Fax No.: 81-3-3234-2551                        Fax No.: 617-492-5664
Attn.: Miki Kurami, Manager                    Attn: President

Notices delivered by fax shall be confirmed by copy delivered by air courier or overnight mail service.

IN WITNESS WHEREOF, the parties have through their duly authorized representatives executed this Agreement under seal as of the date first written above.

NIHON MEDI-PHYSICS CO. LTD,

By: /s/ [ILLEGIBLE]
   ------------------------

Title: President

BIOSTREAM, INC.

By: John W. Babich

Title: CEO, President

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.13

THIS AGREEMENT made in duplicate as of this 14 day of June, 2004.

BETWEEN:

MDS NORDION, a division of MDS (Canada) Inc.
having a place of business at
447 March Road
Ottawa, Ontario, Canada K2K1X8

("Nordion")

AND:

MOLECULAR INSIGHT PHARMACEUTICALS, INC.
having a place of business at
160 Second Street
Cambridge Massachusetts, 02142 USA

("Molecular Insight Pharmaceuticals")

WHEREAS:

I. Molecular Insight Pharmaceuticals is the owner or licensee of a certain compound known as BMIPP (as defined), a heart diagnostic imaging agent;

II. Nordion has expertise in the development of pharmaceutical processes and radiolabelling of compounds;

III. Molecular Insight Pharmaceuticals has developed techniques and demonstrated an ability to label Precursor with 1-123 to form BMIPP;

IV. Molecular Insight Pharmaceuticals desires that Nordion undertake at its facility a development program based upon Molecular Insight Pharmaceutical's technique which will allow Molecular Insight Pharmaceuticals' Precursor to be labeled with 1-123 to form BMIPP;

V. Molecular Insight Pharmaceuticals desires that Nordion establish a facility at its site in Vancouver, British Columbia, to produce and supply BMIPP for use in support of Molecular Insight Pharmaceuticals' Phase III Clinical Trials and in support of Molecular Insight Pharmaceuticals' drug submission to the FDA.

NOW THEREFORE in consideration of the mutual covenants and agreements herein contained, and subject to the terms and conditions hereinafter set out, the parties hereto agree as follows:


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ARTICLE 1 - DEFINITIONS

For the purposes of this Agreement:

1.1 "Affiliate" shall mean an entity or person which controls, is controlled by or is under common control with either party. For purposes of this
Section 1.1 control shall mean (a) in the case of corporate entities, the direct or indirect ownership of more than one-half of the stock or participating shares entitled to vote for the election of directors, and
(b) in the case of a partnership, the power to direct the management and policies of such partnership.

1.2 "BMIPP" shall mean a pharmaceutical product containing 1-123 labeled Precursor in diagnostic dosage form for cardiac imaging.

1.3 "Background Technology" shall mean all Nordion proprietary technology existing prior to the Effective Date, including patents, copyright, know-how, techniques, methods, processes and trade secrets which Nordion owns or which is licensed to Nordion and, in each case, which is in existence in the form of a writing, prototype or can otherwise be demonstrated to be the property of Nordion prior to the Effective Date.

1.4 "Batch" shall mean a production batch of BMIPP manufactured under this Agreement.

1.5 "Clinical Trial Batch Size" shall have the meaning attributed in Section 4.1.

1.6 "Clinical Trials" shall mean Phase III human trials for clinical development of BMIPP in the United States.

1.7 "Commercial Phase" shall mean the period of supply of BMIPP commencing after NDA regulatory approval has been received in the United States by Molecular Insight Pharmaceuticals, from the FDA.

1.8 "Current Good Manufacturing Practices" or "cGMP(s)" shall mean the good manufacturing practices required by the FDA and as set forth in the FD&C or FDA rules and regulations for the manufacturing, testing and quality control of pharmaceutical materials as applied to compounds, which practices are current on the Effective Date of this Agreement and may be supplemented, amended or modified from time to time.

1.9 "Development Phase" shall mean the period commencing from the Effective Date until completion of the activities described in Schedule A.

1.10 "Effective Date" shall mean the date first above written.


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1.11  "FDA" shall mean the United States Food and Drug Administration.

1.12  "FD&C" shall mean the United States Federal Food, Drug and Cosmetic Act,
      as amended.

1.13  "Facility" shall mean the facility to be established by Nordion at its
      manufacturing site in Vancouver, British Columbia as described in Schedule
      B and pursuant to cGMPs, to be used for the production of BMIPP for
      diagnostic applications and purposes.

1.14  "IND" shall mean an Investigational New Drug Application as defined by the
      rules and regulations promulgated under the FD&C and U.S. Public Health
      Service Act and any supplements, modifications or amendments thereunder.

1.15  "Isotope" or "I-123" shall mean Iodine 123.

1.16  "Master Validation Plan" shall mean the program mutually agreed to by the
      parties by which documented evidence provides assurance that the Process
      will consistently produce BMIPP that meets Specifications.

1.17  "NDA" shall mean a new drug application as defined in the rules and
      regulations promulgated under the FD&C and U.S. Public Health Service Act,
      as supplemented, modified or amended from time to time.

1.18  "Precursor" shall mean (beta)-methyl-p-iodophenyl-pentadecanoic acid
      specified in Schedule C and produced pursuant to cGMPs.

1.19  "Process" shall mean the method of formulation, dispensing, and testing of
      the BMIPP developed under this Agreement and in compliance with cGMPS.

1.20  "Reference Standards" shall mean the cGMP compliant compounds as specified
      in Schedule D.

1.21  "Specification(s)" shall mean those final specifications for BMIPP as set
      out in Schedule E, as amended by mutual agreement of the parties from time
      to time.

                              ARTICLE 2 - PURPOSE

2.1   Scope and Object

      The scope and object of this Agreement is to carry out the development of
      the Process in accordance with the responsibilities and obligations
      attributed to each of the parties as set out in this Agreement. In
      addition,

                                        4

      this Agreement shall provide for the establishment of a Facility to be
      utilized, amongst other purposes, in the production and supply of BMIPP as
      required in support of Molecular Insight Pharmaceuticals' BMIPP Phase III
      Clinical Trial and NDA submission to the FDA.

                         ARTICLE 3 - DEVELOPMENT PHASE

3.1   Development Activities

      During the Development Phase, Nordion and Molecular Insight
      Pharmaceuticals shall carry out their respective obligations described and
      attributed in Schedule A, it being understood that some activities may be
      reasonably delayed to the extent that such activity is premised on the
      work or provision of data, information or technology by the other party.
      It is understood and acknowledged that due to the developmental nature of
      the activities to be carried out during the Development Phase, the time
      for completion and sequence for carrying out the activities as set out in
      Schedule A shall serve as a guide. Each party shall use their commercially
      reasonable best efforts in order to carry out, in a timely manner, their
      respective obligations and responsibilities set out in Schedule A.

      If either party, acting in good faith, materially fails to satisfy any
      milestone or is unable to meet such milestone in accordance with the
      timing set out in Schedule A, such party shall provide written notice
      thereof to the other party and the parties shall determine a reasonable
      corrective action plan and revised milestone schedule. If the parties are
      unable to determine a reasonable corrective action plan and revised
      milestone schedule, the parties may submit such matter to binding
      arbitration in Vancouver, British Columbia, pursuant to and conducted
      under the International Commercial Arbitration Act of British Columbia,
      which arbitration shall be conducted before a single arbitrator possessing
      appropriate industry experience as selected by the parties. If the parties
      cannot agree on a single arbitrator, the arbitrator shall be appointed in
      accordance with the International Commercial Arbitration Act of British
      Columbia. The decision of the arbitrators shall be final and binding.

      The parties acknowledge and agree that Schedule A may be amended during
      the course of the Development Phase to accommodate unforeseen events and
      results. All such changes to Schedule A shall be made by written agreement
      of the parties. If any change to Schedule A materially impacts the scope
      of work to be provided by Nordion, Nordion will provide a written estimate
      of the increase in hours of work at the rates set forth in Section 6.3,
      which must be approved in advance by Molecular Insight Pharmaceuticals. No
      work on such scope change shall be carried out by


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

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Nordion prior to Nordion's receipt of Molecular Insight Pharmaceuticals' written approval of such change.

The parties, upon signing this Agreement, shall each designate a program manager, who shall be responsible for coordinating communication and monitoring performance under this Agreement. The program managers shall meet monthly, in person or by telephone, for the purpose of reviewing the status of the project, assessing progress against the milestones and activities set forth in Schedule A, and determining the percentage of each milestone completed and the payments earned, if any, in connection with each milestone. Minutes of meetings shall be prepared, maintained and provided to each of the parties.

3.2 Development Phase Work

In consideration of Nordion performing the Development Phase services, Molecular Insight Pharmaceuticals shall pay Nordion in accordance with the rates set out in Schedule F, which schedule includes amounts payable upon achievement of milestones as well as amounts payable for each Batch produced and supplied by Nordion hereunder. All amounts due Nordion shall be paid by Molecular Insight Pharmaceuticals within thirty (30) days of the date appearing on Nordion's invoice. Such invoice shall, unless otherwise agreed, be payable in United States dollars.

3.3 Facility Program

In consideration of Nordion establishing the Facility, Molecular Insight Pharmaceuticals will pay to Nordion a non-reimbursable facility fee of
[**********************] United States dollars (US $[********]) upon execution of this Agreement.

After the Facility is completed, Nordion shall, in consultation with Molecular Insight Pharmaceuticals, develop and implement a Master Validation Plan for the Facility that will allow the production of BMIPP under cGMPs in the volumes required by Molecular Insight Pharmaceuticals for Phase III clinical supply as described in Section 4.1. The costs of preparation, development and implementation of the Master Validation Plan will be borne by Nordion. Prior to implementation, both parties shall in writing approve the Master Validation Plan. Nordion shall ensure that the Facility is available for the production of BMIPP for supply to Molecular Insight Pharmaceuticals on a priority basis at least three days per week to be mutually agreed between the parties.

3.4 Repairs and Maintenance


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After the Facility is established, Nordion shall maintain such Facility in satisfactory operating condition as required by the Specifications, Process and cGMPs, and all other applicable laws, regulations, rules or orders. The cost of repairs, preventive maintenance and service contracts for the Facility shall be borne by Nordion.

3.5 Commercial Phase Negotiations

Within thirty (30) days after completion of Milestone 2 under the Development Phase, the parties shall for a period of at least sixty (60) days enter into good faith negotiations for the supply of BMIPP to Molecular Insight Pharmaceuticals, during the Commercial Phase.

ARTICLE 4 - BATCH SIZE IN SUPPORT OF NDA SUBMISSION

4.1 Clinical Supply Batch Size

The Batch size for Clinical Trial supply shall be thirty (30) doses of BMIPP. The maximum number of vials available for shipment from any Batch will be twenty (20) doses with the remainder being retained by Nordion for archival and quality assurance testing. BMIPP will be shipped in an appropriate lead shield, which will be provided at Nordion's expense. All necessary labels for shipment will be provided by Molecular Insight Pharmaceuticals and shall meet all applicable regulatory requirements.

ARTICLE 5 - GENERAL MANUFACTURE AND
SUPPLY OBLIGATIONS OF NORDION

5.1 BMIPP Supply

Nordion agrees to (i) use the Process to produce Batches of BMIPP that meet the Specifications and are manufactured in conformance with cGMPs and
(ii) ship BMIPP to customers as directed by Molecular Insight Pharmaceuticals. Nordion reserves the right to withhold from shipment any Batch which does not conform to Specifications. The price of any Batch required by Molecular Insight Pharmaceuticals during the term of this Agreement shall be as set out in Schedule F. The parties agree that Molecular Insight Pharmaceuticals will provide BMIPP at its expense and Nordion will supply isotopes and other supplies at its expense.

5.2 Compliance with Law; Handling of BMIPP

While Precursor, Isotope and BMIPP are in its possession or under its control, Nordion shall be responsible for compliance with applicable statutory and regulatory requirements in the United States and Canada regarding the development, manufacture, handling, storage, labeling,


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packaging, transportation and shipment of the Precursor, Isotope and
BMIPP.

5.3 Testing and Documentation

Nordion shall maintain accurate and complete production records with respect to the Process, Batches and shipments and Molecular Insight Pharmaceuticals shall have access to such records in order to determine that each Batch was produced and tested in compliance with the Specifications and cGMP requirements.

The tests and analyses provided in the Specifications as well as the nature and form of records may be amended by Nordion from time to time, subject to the consent of Molecular Insight Pharmaceuticals, which shall not be unreasonably withheld after Nordion shall have delivered to Molecular Insight Pharmaceuticals, in writing, an explanation of such changes and why they are necessary or advisable.

ARTICLE 6 - GENERAL
MOLECULAR INSIGHT PHARMACEUTICALS OBLIGATIONS

6.1 Precursor and Reference Standards

Molecular Insight Pharmaceuticals or, at Molecular Insight Pharmaceuticals' discretion its designee, shall provide Precursor and Reference Standards to Nordion at no charge, which meets the specifications in Schedules C and D in sufficient quantities to permit Nordion to meet its obligations hereunder. Nordion shall only use Precursor and Reference Standards for the manufacture of BMIPP pursuant to this Agreement. Nordion shall store Precursor and Reference Standards in accordance with its applicable specifications set out in Schedule C and D respectively. Molecular Insight Pharmaceuticals shall at all times retain title in and to such materials in Nordion's possession.

6.2 Unavailability or Scarcity of Precursor or Reference Standards

Molecular Insight Pharmaceuticals will notify Nordion upon Molecular Insight Pharmaceuticals becoming aware of a shortage of supply of Precursor or Reference Standards, if such shortage will impact the manufacture of the BMIPP. Except as set out below, Molecular Insight Pharmaceuticals shall not be liable for any delays or shortages in the supply of Precursor or Reference Standards, provided however, that any such shortages or delays in Precursor or Reference Standards supply will excuse Nordion's performance of activities related to such Batch of BMIPP only to the extent that Nordion's non-performance was caused by the


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Precursor or Reference Standards supply delay or shortage and only for a period of time equal to the delay.

6.3 Additional Compensation to Nordion

In addition to the amounts set forth in Schedule F, Molecular Insight Pharmaceuticals will compensate Nordion based on the rate of one hundred and twenty-five United States dollars (US$125.00) per person per hour for the time spent by Nordion on the following activities only and upon Molecular Insight Pharmaceuticals prior written request:

(i) preparing and hosting Facility audits requested by Molecular Insight Pharmaceuticals including FDA preaudit inspections;

(ii) preparing responses to FDA inquiries and preparation by Nordion of information requested by Molecular Insight Pharmaceuticals in support of Molecular Insight Pharmaceuticals' BMIPP NDA submission; and

(iii) attending meetings with the FDA.

Molecular Insight Pharmaceuticals shall reimburse Nordion for all costs incurred for travel and accommodation in carrying out the foregoing activities. Nordion shall provide an estimate of all such activities to Molecular Insight Pharmaceuticals prior to incurring the expenditure.

ARTICLE 7 - BMIPP SHIPMENTS

7.1 Orders and Shipments

During the term of this Agreement, Molecular Insight Pharmaceuticals will forward orders to Nordion at its Kanata, Ontario facility by facsimile. Each order will set forth the quantity to be produced and shipped, the identity of the recipient, delivery destination protocol number, IND number, applicable USNRC materials license number and IRS number. Delivery of BMIPP to Molecular Insight Pharmaceuticals or as otherwise directed by Molecular Insight Pharmaceuticals shall be FOB transport vehicle at Nordion's facility in Vancouver, British Columbia. Risk of loss of BMIPP shall pass to Molecular Insight Pharmaceuticals at point of delivery.

During the term of this Agreement Nordion shall use commercially reasonable best efforts to meet Molecular Insight Pharmaceuticals' orders and delivery requirements. Prior to the first shipment of BMIPP to any third party site, Molecular Insight Pharmaceuticals shall obtain from such third party and provide to Nordion such third party's license evidencing proper legal authority for the receipt and possession of the BMIPP by such third party. Molecular Insight Pharmaceuticals shall obtain all approvals, licenses and permits required to import BMIPP into the United States.


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Nordion shall make shipping arrangements with AirNet Express or such other carrier designated by Nordion and reasonably approved by Molecular Insight Pharmaceuticals. All shipping costs incurred to deliver BMIPP shall be borne by Molecular Insight Pharmaceuticals.

Molecular Insight Pharmaceuticals shall be entitled to cancel any Batch ordered from Nordion by providing to Nordion at least two (2) business days written notice of cancellation prior to the later of commencement of production or the scheduled production date. The failure to give notice hereunder shall result in Molecular Insight Pharmaceuticals being required to pay the full purchase price of such Batch to Nordion. All orders for BMIPP shall be forwarded by Molecular Insight Pharmaceuticals and received by Nordion by the Friday Noon (Eastern time) prior to the week in which BMIPP is to be manufactured.

7.2 Warranty/Recall

Nordion warrants the BMIPP will meet the Specifications and be manufactured in accordance with cGMP's and be free from defects in material and workmanship for the period from the date of manufacture to the expiry date set out on each vial of BMIPP.

If either party discovers that a Batch of BMIPP does not meet the Specifications, then the discovering party shall promptly communicate with the other party. If Molecular Insight Pharmaceuticals determines that the failure to meet Specifications results from an act, failure to act or other fault of Nordion, or agent of Nordion, Nordion will promptly:

(i) repair or replace such batch of BMIPP; and

(ii) pay for shipping costs of replacement of BMIPP.

In the event that Nordion disputes Molecular Insight Pharmaceuticals' determination that the fault id due to Nordion and/or its agent, the parties will select a mutually acceptable outside consulting firm which will be instructed to review the applicable information and data and confirm or dissent from Molecular Insight Pharmaceuticals' determination. If the consulting firm confirms Molecular Insight Pharmaceuticals' determination, Nordion will have the obligations set out in this Section and Nordion will pay the fees of such consulting firm. If the consulting firm dissents from Molecular Insight Pharmaceuticals' determination or determines that the failure to meet Specifications was due to products, information or services supplied by Molecular Insight Pharmaceuticals, Nordion will not have the obligations set out in this Section with respect to the disputed Batch and Molecular Insight Pharmaceuticals will pay the fees for such consulting firm.


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ARTICLE 8 - LICENSE

8.1 Royalty-Free License

Molecular Insight Pharmaceuticals hereby provides to Nordion a nonexclusive, nontransferable, royalty-free license during the term of this Agreement to use the patents, data, information and technology provided by Molecular Insight Pharmaceuticals relating to BMIPP and the radiolabelling of 1-123 with Precursor for the sole purpose of assisting Nordion in carrying out its obligations set out in this Agreement. Molecular Insight Pharmaceuticals represents and warrants that the technology provided by Molecular Insight Pharmaceuticals relating to BMIPP allows for BMIPP to be terminally sterilized while still meeting the specifications set out in Schedule E.

ARTICLE 9 - MOLECULAR INSIGHT PHARMACEUTICALS
REPRESENTATIONS AND WARRANTIES

9.1 Molecular Insight Pharmaceuticals' Representations and Warranties

Molecular Insight Pharmaceuticals represents, warrants and covenants that:

(i) it has full right, power and authority to enter into this Agreement;

(ii) it is the owner or has the right of use of the patents, data, information and technology supplied to Nordion by Molecular Insight Pharmaceuticals to assist Nordion in manufacturing BMIPP and in carrying out its obligations hereunder;

(iii) to Molecular Insight Pharmaceuticals' knowledge, there is no action or proceeding pending or threatened against Molecular Insight Pharmaceuticals before any court, administrative agency or other tribunal which might have an adverse material effect on its ability to perform its obligations hereunder;

(iv) it has the right to grant the license in section 8.1 and right to permit Nordion to use the patents, technology and know how provided to the extent required to assist Nordion in carrying out its obligations under this Agreement;

(v) it has not received any notice of adverse claim or infringement of any patent, copyright, or misappropriation of trade secrets in connection with the use and exploitation of the Precursor, Reference Standard or BMIPP;

(vi) to Molecular Insight Pharmaceuticals' best information and belief, use or sale of Precursor, Reference Standards and BMIPP and the data, information, technology and know how used in the Process and manufacture of BMIPP contributed by Molecular Insight Pharmaceuticals do not infringe any valid third party patent,


11

pending published patent application or other intellectual property right.

ARTICLE 10 - NORDION'S REPRESENTATIONS AND WARRANTIES

10.1  Representations and Warranties

      Nordion represents, warrants and covenants that:

      (i)   it has full right and authority to enter into this Agreement;

      (ii)  it is the owner or has the right to use the data, information and
            technology contributed by it with respect to the Background
            Technology and other proprietary technology contributed by Nordion
            during the Agreement;

      (iii) the Background Technology contributed by Nordion does not, to
            Nordion's best information and belief, infringe any patents,
            copyright or other industrial or intellectual property rights of
            third parties;

      (iv)  it has not received any notice of adverse claim of infringement of
            any patent or misappropriation of trade secrets in connection with
            the use and exploitation of the data, information and technology
            used with respect to Background Technology contributed by Nordion;
            and

      (v)   to Nordiont's knowledge, there is no action or proceeding pending or
            threatened against Nordion before any court, administrative agency
            or other tribunal which might have a adverse material effect on
            Nordion's ability to perform its obligations hereunder.

                             ARTICLE 11 - INDEMNITY

11.1  Indemnification by Molecular Insight Pharmaceuticals

      Molecular Insight Pharmaceuticals agrees to indemnify, defend and hold
      Nordion and its Affiliates and their respective directors, officers,
      employees and agents, harmless from and against any damages, claims,
      liabilities and expenses (including, but not limited to, reasonable
      attorney's fees) resulting from any third party claims or suits ("General
      Claims Against Nordion") arising out of (a) Molecular Insight
      Pharmaceuticals' or a third party's use, handling or shipment of Reference
      Standards, Precursor or BMIPP, (b) Molecular Insight Pharmaceuticals'
      breach of any of its obligations, warranties or representations hereunder,
      or (c) Molecular Insight Pharmaceuticals' negligent acts or omissions or
      willful misconduct. Notwithstanding the foregoing, Molecular Insight
      Pharmaceuticals will not be required to indemnify, defend and hold Nordion
      and its Affiliates and their respective directors, officers, employees and
      agents harmless from and against any General Claims Against Nordion to the
      extent that such claims arise out of (i) Nordion's

                                       12

      breach of any of its obligations, warranties or representations hereunder;
      (ii) Nordion's negligent acts or omissions or willful misconduct; (iii)
      any failure of Nordion to manufacture, handle, store, label, package,
      transport or ship BMIPP in accordance with this Agreement, cGMPs or any
      other applicable laws, rules, regulations or other requirements of any
      applicable governmental entity; or (iv) any failure of Nordion to
      manufacture BMIPP consistent with the Specifications and requirements set
      forth herein or with the applicable sections of Molecular Insight
      Pharmaceuticals' IND in the United States. Notwithstanding anything in
      this Section 11.1, "General Claims Against Nordion" shall not include "IP
      Claims Against Nordion" as described in Section 11.3.

11.2  Indemnification by Nordion

      Nordion agrees to indemnify, defend and hold Molecular Insight
      Pharmaceuticals and its Affiliates and their respective directors,
      officers, employees and agents, harmless from and against any damages,
      claims, liabilities and expenses (including, but not limited to,
      reasonable attorney's fees) resulting from any third party claims or suits
      ("General Claims Against Molecular Insight Pharmaceuticals") arising out
      of (a) Nordion's manufacture, handling, storage, labeling, packaging or
      delivery of the BMIPP; (b) Nordion's breach of any of its obligations,
      warranties or representations hereunder; (c) Nordion's negligent acts or
      omissions or willful misconduct; (d) any failure of the BMIPP to meet the
      Specifications; or (e) any failure of Nordion to manufacture, handle,
      store, label, package, transport or ship BMIPP in accordance with this
      Agreement or cGMPs or any other applicable laws, regulations or other
      requirements of any applicable governmental entity. Notwithstanding the
      foregoing, Nordion will not be required to indemnify, defend and hold
      Molecular Insight Pharmaceuticals and its Affiliates and their respective
      directors, officers, employees and agents harmless from and against any
      General Claims Against Molecular Insight Pharmaceuticals to the extent
      that such claims arise out of (i) Molecular Insight Pharmaceuticals'
      breach of any of its obligations, warranties or representations hereunder;
      (ii) Molecular Insight Pharmaceuticals' negligent acts or omissions or
      willful misconduct; (iii) any defect or failure of Reference Standards or
      Precursor to meet applicable specifications or (iv) Molecular Insight
      Pharmaceuticals' or third party's use of BMIPP. Notwithstanding anything
      in this Section 11.2, "General Claims Against Molecular Insight
      Pharmaceuticals" shall not include "IP Claims Against Molecular Insight
      Pharmaceuticals" as described in Section 11.4.

11.3  Intellectual Property Claims Against Nordion

      Molecular Insight Pharmaceuticals agrees to indemnify, defend and hold
      Nordion and its Affiliates and their respective directors, officers,

                                       13

      employees and agents, harmless from and against any damages, claims,
      liabilities and expenses (including, but not limited to, reasonable
      attorneys' fees) resulting from any third party claims or suits arising
      out of any proceeding instituted by or on behalf of a third party based
      upon a claim that the Process, method of manufacture, use or sale of the
      Reference Standards, Precursors or BMIPP infringes a United States or
      Canadian patent or any other intellectual property or proprietary right of
      a third party ("IP Claims Against Nordion"). Notwithstanding the
      foregoing, to the extent the Process or method of manufacture is developed
      or contributed by Nordion, Molecular Insight Pharmaceuticals will not be
      required to indemnify, defend or hold harmless Nordion or its Affiliates,
      and their respective directors, officers, employees and agents from and
      against IP Claims Against Nordion.

11.4  Intellectual Property Claims Against Molecular Insight Pharmaceuticals

      Nordion agrees to indemnify, defend and hold harmless Molecular Insight
      Pharmaceuticals and its Affiliates, and their respective directors,
      officers, employees and agents from and against any damages, claims,
      liabilities and expenses (including, but not limited to, reasonable
      attorney's fees) resulting from any third party claims or suits arising
      out of any proceeding instituted by or on behalf of a third party based
      upon a claim that the Background Technology, the method of manufacture of
      BMIPP or the Process, to the extent developed or contributed by Nordion,
      infringes a United States or Canadian patent or any other intellectual
      property or proprietary right of a third party ("IP Claims Against
      Molecular Insight Pharmaceuticals").

11.5  Infringement

      In the event that any portion of the Background Technology or technology
      developed or contributed by Nordion under this Agreement becomes the
      subject of a claim for a patent, copyright or other industrial or
      intellectual property rights infringement action by a third party, Nordion
      may,

      (i)   if such technology was contributed by Nordion, procure the right to
            continue using the radiolabelling technology within a reasonable
            time not to exceed sixty (60) days; or

      (ii)  modify the Process (to the extent developed or contributed by
            Nordion) to become non-infringing; or

      (iii) if neither (i) nor (ii) are possible, upon written notice to
            Molecular Insight Pharmaceuticals immediately cease its activities
            and/or terminate this Agreement.

      The cost and expense of any opinion of counsel sought by Nordion under
      this section shall be borne by Nordion. Nordion reserves the right to
      control and direct the defense and/or settlement of such claim with legal
      counsel of its choosing; provided, however, that it may not settle such

                                       14

      claims without the prior written consent of Molecular Insight
      Pharmaceuticals, which shall not be unreasonably withheld or delayed;
      provided, further that no such consent from Molecular Insight
      Pharmaceuticals shall be required if such settlement includes a full
      release of Molecular Insight Pharmaceuticals.

      In the event that any portion of the Process that was developed or
      contributed by Molecular Insight Pharmaceuticals becomes the subject of a
      claim for a patent, copyright or other industrial or intellectual property
      rights infringement action by a third party, Molecular Insight
      Pharmaceuticals may, (i) within a reasonable time not to exceed sixty (60)
      days procure the right to continue using the Process or technology, (ii)
      modify the Process, to the extent contributed by Molecular Insight
      Pharmaceuticals, to become non-infringing or (iii) if neither (i) nor (ii)
      are reasonably possible, Molecular Insight Pharmaceuticals may terminate
      this Agreement upon written notification to Nordion. Molecular Insight
      Pharmaceuticals reserves the right to control an direct the defense and/or
      settlement of such claims with legal counsel of its choosing; provided,
      however, that it may not settle such claims without the prior written
      consent of Nordion, which shall not be unreasonably withheld or delayed;
      provided, further that no such consent from Nordion shall be required if
      such settlement includes a full release of Nordion.

11.6  Indemnification Procedures

      A party (the "indemnitee") which intends to claim indemnification under
      this Article 11 shall promptly notify the other party (the "Indemnitor")
      in writing of any action, claim or other matter in respect of which the
      Indemnitee or any of its directors, officers, employees or agents intend
      to claim such indemnification; provided, however, the failure to provide
      such notice within a reasonable period of time shall not relieve the
      Indemnitor of any of its obligations hereunder except to the extent the
      Indemnitor is materially prejudiced by such failure. The Indemnitor shall
      be entitled to control the defense of and/or settle any such action, claim
      or other matter. The Indemnitee agrees to the complete control of such
      defense or settlement by the Indemnitor, provided, however, any settlement
      of such claims shall require the Indemnitee's prior written consent unless
      such settlement includes a full release of the Indemnitee, in which case
      no consent shall be required. The Indemnitee and its directors, officers,
      employees and agents shall co-operate fully with the Indemnitor and its
      legal representatives in the investigation and defence of any action,
      claim or other matter covered by this indemnification. The Indemnitee
      shall have the right, but not the obligation, to be represented by counsel
      of its own selection and at its own expense.


15

ARTICLE 12 - PATENTS AND TECHNOLOGY

12.1  Ownership of Work Performed

      The portion of the Process as developed or contributed by Molecular
      Insight Pharmaceuticals shall be the sole and exclusive property of
      Molecular Insight Pharmaceuticals. Except to the extent the Process is
      developed or contributed by Molecular Insight Pharmaceuticals, Molecular
      Insight Pharmaceuticals agrees and acknowledges that any and all ideas,
      technology, method, data, information, inventions, improvements,
      derivative works and works of authorship conceived, written, created or
      first reduced to practice in the performance of the development of the
      Process, Background Technology and improvements to the Background
      Technology during the term of this Agreement, shall be the sole and
      exclusive property of Nordion.

                         ARTICLE 13 - REGULATORY MATTERS

13.1  Regulatory Status

      Upon Nordion's reasonable request, Molecular Insight Pharmaceuticals shall
      provide updates to Nordion on (i) the progress of Clinical Trials related
      to BMIPP, and (ii) submissions to the FDA and other jurisdictions and
      regulatory agencies for marketing authorization with respect to BMIPP.

13.2  Molecular Insight Pharmaceuticals Responsibilities

      It shall be the responsibility of Molecular Insight Pharmaceuticals or its
      designee to file, obtain and maintain an IND, registrations, listings,
      authorizations and approvals as the FDA or any other applicable
      governmental entity may require to enable use of BMIPP in Clinical Trials
      in the United States. Nordion shall provide directly to Molecular Insight
      Pharmaceuticals, or at Nordion's discretion for the purpose of protection
      of its proprietary technology with respect to the manufacture of the
      Isotope, directly to the regulatory authority all required information in
      its possession necessary to assist Molecular Insight Pharmaceuticals in
      filing, obtaining and maintaining all licenses, registrations, listings,
      authorizations and approvals of any governmental entities necessary for
      the use of BMIPP in support of Molecular Insight Pharmaceuticals' BMIPP
      NDA submission.

13.3  Nordion Responsibilities

      Nordion shall be responsible for obtaining and maintaining all necessary
      Facility licenses, registrations, authorizations and approvals which are
      necessary to develop, manufacture, handle, store, label, package,

                                       16

      transport and ship BMIPP under cGMP conditions and other regulatory
      requirements including, but not limited to, the use and handling of
      radioactive materials.

      At Nordion's expense, Nordion shall update its existing 1-123 bulk
      chemical or facility description Drug Master File ("DMF") with the FDA as
      may be required for Molecular Insight Pharmaceuticals' NDA for BMIPP in
      accordance with Schedule A. Nordion hereby grants Molecular Insight
      Pharmaceuticals a right of reference to such DMF, and upon request shall
      provide a letter of access to the DMF allowing regulatory review of the
      DMF by the FDA in conjunction with Molecular Insight Pharmaceuticals'
      BMIPP submissions. At Nordion's expense, Nordion shall apply for and seek
      a DMF for BMIPP in accordance with Schedule A.

13.4  Government Inspections, Compliance Review and Inquiries

      Upon request of any governmental entity or any third party entity
      authorized by a governmental entity, such entity shall, for the purpose of
      regulatory review, have access to observe and inspect the (i) Facility,
      (ii) procedures used for the storage of Reference Standards and Precursor,
      and (iii) manufacturing, testing, storage and shipping of BMIPP, including
      Process development operations, and auditing the Facility for compliance
      with cGMP and/or other applicable regulatory standards. Nordion shall give
      Molecular Insight Pharmaceuticals prompt written notice of any upcoming
      inspections or audits by a governmental entity of the Facility or any of
      the foregoing and shall allow Molecular Insight Pharmaceuticals to
      participate in such audits by being present at any FDA close out meeting
      and shall provide Molecular Insight Pharmaceuticals with a written summary
      of such inspection or audit following completion thereof. Nordion agrees
      to use commercially reasonable efforts to promptly rectify or resolve any
      deficiencies noted by a government entity in a report or correspondence
      issued to Nordion.

13.5  Access to the Facility

      Molecular Insight Pharmaceuticals shall have reasonable access to the
      Facility at least once per calendar quarter during the Development Phase
      for the purpose of observing Process development relating to BMIPP.
      Molecular Insight Pharmaceuticals shall provide to Nordion at least five
      (5) business days prior written notice of requested access to the Facility
      for the purpose of this Section. All such information disclosed to
      Molecular Insight Pharmaceuticals or its employees or agents, shall be
      deemed to be Nordion's Confidential Information as such term is defined in
      Section 14.1 of this Agreement.

13.6  Recalls

                                       17

      Molecular Insight Pharmaceuticals shall notify Nordion promptly if BMIPP
      is the subject of a recall or correction (a "Recall"), and Molecular
      Insight Pharmaceuticals and/or its designee shall have sole responsibility
      for the handling and disposition of such Recall. Molecular Insight
      Pharmaceuticals and/or its designee shall bear the costs of any Recall of
      BMIPP unless and to the extent such Recall shall have been the result of
      Nordion's or its employees acts of omissions or any product defects for
      which Nordion is responsible in which case Nordion shall to such extent be
      responsible for all of Molecular Insight Pharmaceuticals' out-of-pocket
      costs incurred for:

      (i)   notification of recall to Nordion and third parties;

      (ii)  return shipment of any defective BMIPP to Nordion; and

      (iii) replacement of BMIPP.

      In the event that Nordion disputes Molecular Insight Pharmaceuticals'
      determination that the fault is due to Nordion and/or to its agent, the
      parties will select a mutually agreeable outside consulting firm which
      will be instructed to review the applicable information and data and to
      confirm or dissent from Molecular Insight Pharmaceuticals' determination.
      If the consulting firm confirms Molecular Insight Pharmaceuticals'
      determination, Nordion will pay the fees of such consulting firm. If the
      consulting firm dissents from Molecular Insight Pharmaceuticals'
      determination Nordion will not have the obligations set forth herein with
      respect to the Recall and Molecular Insight Pharmaceuticals will pay the
      fees of such consulting firm. Molecular Insight Pharmaceuticals and/or its
      designee shall maintain records of all sales, shipping records of BMIPP
      and customers in sufficient detail to adequately administer a Recall for
      the period of time as required by applicable regulation.

13.7  New Regulatory Requirements

      Each party shall promptly notify the other of new regulatory requirements
      of which it becomes aware which are relevant to the manufacture of BMIPP
      under this Agreement and which are required by the FDA and other
      applicable governmental entities and the parties shall confer with each
      other with respect to the best means to implement and comply with such
      requirements.

13.8  Records

      Nordion shall maintain all records necessary to evidence compliance with
      (i) all applicable laws, regulations and other requirements of applicable
      governmental entities in the United States and Canada relating to the
      supply and manufacture of BMIPP; (ii) the Specifications; and (iii)
      obligations under this Agreement. All such records shall be maintained by

                                       18

      Nordion for at least two (2) years after termination or expiration of this
      Agreement. Nordion shall provide to Molecular Insight Pharmaceuticals
      reasonable access to such records upon request. Prior to destruction of
      any record after such time, Nordion shall give written notice to Molecular
      Insight Pharmaceuticals. Molecular Insight Pharmaceuticals shall have the
      right to request that Nordion maintain such records in an off site storage
      facility for such longer periods as Molecular Insight Pharmaceuticals
      requests, provided that Molecular Insight Pharmaceuticals pays all costs
      associated with such off site storage.

                          ARTICLE 14 - CONFIDENTIALITY

14.1  Confidentiality and Exceptions

      During the term of this Agreement and for a period of ten (10) years
      thereafter, each party hereto shall maintain in confidence the content of
      the transactions contemplated herein, all technology including Background
      Technology and improvements thereto, Nordion proprietary technology,
      Molecular Insight Pharmaceuticals proprietary technology, trade secrets,
      know-how, data, processes, methods, techniques, formulas and test data
      (collectively "Confidential Information") and other information disclosed
      to such party by the other party which is identified as "Confidential
      information" by the disclosing party. This obligation of confidentiality
      shall not apply to the extent that it can be established by the party in
      receipt of such information, that the information:

      (i)   was already known to the receiving party at the time of disclosure;

      (ii)  was generally available to the public or otherwise part of the
            public domain at the time of its disclosure;

      (iii) became generally available to the public or otherwise part of the
            public domain after its disclosure to the receiving party through no
            act or omission of the receiving party;

      (iv)  was disclosed to the receiving party by a third party who was not
            known or ought to be known to the receiving party to have
            obligations restricting disclosure of such information; or

      (v)   was independently developed by the receiving party without any use
            of Confidential Information of the disclosing party.

      Each party agrees that it will take the same steps to protect the
      confidentiality of the other party's Confidential Information as it takes
      to protect its own proprietary and confidential information, which shall
      in no event be less than commercially reasonable steps. Each party, and
      its employees and agents shall protect and keep confidential and shall not
      use, publish or otherwise disclose to any third party, except as permitted
      by this Agreement, as necessary to perform its obligations hereunder, or

                                       19

      with the other party's written consent, the other party's Confidential
      Information.

      It is agreed that disclosure of data, information or technology by
      Molecular Insight Pharmaceuticals or Nordion to the other under this
      Agreement shall not constitute any grant, option or license under any
      patent, technology or other rights, held by Molecular Insight
      Pharmaceuticals or Nordion. Any use of the data, information and
      technology provided by Molecular Insight Pharmaceuticals to Nordion which
      relates to Precursor, Reference Standards or radiolabelling of Precursor
      shall be for the limited purpose of assisting Nordion in carrying out its
      obligations under this Agreement. All data, information, or technology
      supplied by one party to the other to assist in carrying out the
      obligations hereunder shall remain the property of such party and shall be
      returned to the other party upon termination of this Agreement.

                     ARTICLE 15 - DISCLOSURE OF INFORMATION

15.1  Authorized Disclosure

      Notwithstanding section 14.1 each party may disclose Confidential
      Information to the extent such disclosure is reasonably necessary for
      prosecuting or defending litigation and/or complying with applicable
      government laws or regulations, provided that if a party is required by
      law or regulation to make any such disclosure of the other party's
      Confidential Information it will give reasonable notice to the other party
      of such disclosure requirement.

                        ARTICLE 16 - TERM AND TERMINATION

16.1  Initial Term

      The term of this agreement shall commence upon the Effective Date and,
      unless terminated earlier pursuant to this agreement, or extended upon
      mutual agreement of the parties, shall expire on December 31, 2005.

16.2  Termination Without Cause

      Molecular Insight Pharmaceuticals may terminate this Agreement without
      cause or penalty upon thirty- (30) day's prior written notice to Nordion.
      Upon such termination, Nordion shall be entitled to retain all amounts
      paid by Molecular Insight Pharmaceuticals and Molecular Insight
      Pharmaceuticals shall pay to Nordion any amounts due and/or earned but not
      yet paid.


20

16.3  Termination for Breach

      This Agreement may be terminated by either party in the event of the
      material breach by the other party of the terms and conditions hereof;
      provided, however, the other party shall first give to the breaching party
      written notice of the proposed termination of this Agreement (a "Breach
      Notice"), specifying the grounds therefor. Upon receipt of such Breach
      Notice, the breaching party shall have such time as necessary, but in any
      event not more than thirty (30) days to cure such breach. Notwithstanding
      the foregoing, if the breaching party does not cure such breach within
      such cure period, the other party may terminate the Agreement without
      prejudice to any other rights or remedies which may be available to the
      non-breaching party.

16.4  Bankruptcy

      This Agreement may be terminated by a party in the event the other party
      files a petition in bankruptcy, is adjudicated a bankrupt, makes an
      assignment for the benefit of its creditors, or otherwise seeks relief
      under or pursuant to any bankruptcy, insolvency or reorganization statute
      or proceeding, or if a petition in bankruptcy is filed against it which is
      not dismissed within ninety (90) days or proceedings are taken to
      liquidate the assets of such party.

                             ARTICLE 17 - SURVIVAL

17.1  Consequences or Termination or Expiration

      Upon expiration or termination of this Agreement, the obligations of the
      parties under Articles 9, 10, 11, 12, 14, 15, 19 and 24 shall survive such
      expiration or termination in accordance with its terms.

                               ARTICLE 18-NOTICES

18.1  Any notice to be sent to a party hereunder shall be forwarded to:

      Nordion at:     MDS Nordion
                      447 March Road
                      Ottawa, ON
                      K2K 1X8
      Attention:      Senior Vice President, Nuclear Medicine
                      Fax:

      Molecular Insight Pharmaceuticals at:


21

                Molecular Insight Pharmaceuticals, Inc.
                160 Second Street
                Cambridge, MA
Attention:      Chief Operating Officer
                Fax: 617-492-5664

Any notice required or authorized to be given by a party to the other in accordance with the provisions of this Agreement shall, unless otherwise specifically stipulated, be in writing and delivered personally, by a nationally recognized overnight courier, or if by electronic facsimile confirmed by certified or registered mail. Notice shall be deemed delivered upon receipt.

ARTICLE 19 - LIMITED LIABILITY

19.1  Disclaimer

      In no event shall either party be liable to the other party for indirect,
      punitive, contingent, incidental, special or consequential damages.

19.2  Limitation of Product Warranty

      MOLECULAR INSIGHT PHARMACEUTICALS ACKNOWLEDGES THAT NORDION IS
      MANUFACTURING AND SUPPLYING BMIPP TO MEET SPECIFICATIONS. EXCEPT AS
      EXPRESSLY SET OUT IN THIS AGREEMENT, NORDION HEREBY DISCLAIMS ALL OTHER
      WARRANTIES OR CONDITIONS, WHETHER EXPRESS OR IMPLIED, STATUTORY OR
      OTHERWISE, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OR
      CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

                   ARTICLE 20 - ASSIGNMENT AND SUBCONTRACTING

20.1  No Assignment

      This Agreement shall enure to the benefit of and shall be binding upon the
      heirs, executors, administrators, successors and permitted assigns of the
      parties. Neither Nordion nor Molecular Insight Pharmaceuticals shall
      assign this Agreement or any portion of this Agreement without the written
      approval of the other party, which approval shall not be unreasonably
      withheld; provided, however, that Molecular Insight Pharmaceuticals may
      assign this Agreement without Nordion's consent in connection with the
      sale of all or substantially all of its stock or assets to a third party
      or in connection with a merger, consolidation or similar transaction.

                             ARTICLE 21 - COMPLIANCE

21.1  Compliance with Laws


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

22

This Agreement and Nordion's and Molecular Insight Pharmaceuticals' obligations hereunder shall be carried out in compliance with all applicable laws, by-laws, rules, regulations and orders of all applicable Federal, State, Provincial and Municipal governments.

ARTICLE 22 - NON-WAIVER

22.1  Non-Waiver of Rights

      Failure by either party to enforce at any time any of the provisions of
      this Agreement shall not be constructed as a waiver of its rights
      hereunder. Any waiver of a breach of any provision hereof shall not be
      effective unless in writing and shall not affect either party's rights in
      the event of any additional breach.

22.2  Force Majeure

      Neither party shall be liable to the other for failure to perform or delay
      in performing its obligations under this Agreement by virtue of the
      occurrence of an event of Force Majeure. In the event of Force Majeure,
      the party affected shall promptly notify the other and shall exert
      commercially reasonable efforts to eliminate, cure or overcome such event
      and to resume performance of its obligations. In the event such Force
      Majeure affecting either party continues for more than thirty (30) days
      the party not subject of the Force Majeure may terminate this Agreement.
      "Force Majeure" shall mean an occurrence which prevents, delays or
      interferes with the performance by a party of any of its obligations
      hereunder if such event occurs by reason of any act of God, flood, power
      failure, fire, explosion, casualty or accident, or war, revolution, civil
      commotion, acts of public enemies, blockage or embargo, or any law, order
      or proclamation of any government, failure of suppliers or usually
      supplier to provide materials, equipment or machinery, interruption of or
      delay in transportation, strike or labor disruption.

                             ARTICLE 23 - INSURANCE

23.1  Product Liability Insurance

      During the term of this Agreement and for a period of one (1) year
      thereafter Molecular Insight Pharmaceuticals at its own expense shall
      provide and maintain a products liability insurance policy issued by a
      reputable insurance company with respect to BMIPP. Such policy shall add
      Nordion as an additional insured and shall have a limit of liability of
      not less than [*************] United States dollars ($[*********]US) per
      occurrence and in the aggregate. Molecular Insight Pharmaceuticals shall

                                       23

      be solely responsible for any deductible or retention associated with this
      policy and such deductible or retention amounts shall not affect Nordion's
      interests. The policy shall contain a cross liability clause and shall
      provide for severability of interest such that breach of a policy
      condition committed by any one insured shall not adversely affect the
      rights of the other insured. Nordion shall be provided thirty (30) days'
      prior written notice of any material change to the policy and such change
      shall be subject to Nordion's prior written consent, which consent shall
      not be unreasonably withheld. Nothing contained in this Section shall be
      deemed to limit in any way the indemnification provisions contained in
      this Agreement.

                            ARTICLE 24 - PUBLICATION

24.1  Publicity

      The parties agree that, except as may otherwise be required by applicable
      laws, regulations, rules or orders or in connection with obtaining
      regulatory approvals for BMIPP, no information concerning this Agreement
      and the transactions contemplated herein shall be made public by either
      party without the prior written consent of the other, which consent shall
      not be unreasonably withheld or delayed. In the event either party decides
      to issue a press release announcing the execution of this Agreement, it
      shall not do so without the prior written approval of the other party.

      A copy of any proposed press release shall be provided to the other party
      for approval at least three (3) business days prior to any proposed
      release.

      In the event that this Agreement or any portion of its contents is
      required to be disclosed by Molecular Insight Pharmaceuticals or Nordion
      pursuant to Security Exchange Commission rules or regulations or other
      federal or state authorities, Molecular Insight Pharmaceuticals or
      Nordion, as the case may be, shall provide reasonable notice to the other
      prior to any such disclosure in order that, to the extent possible while
      enabling the party to comply with the applicable laws, rules and
      regulations, the content so disclosed does not include information which
      may reasonably be considered by the other as confidential, proprietary
      and/or commercially sensitive information.

                         ARTICLE 25 - DISPUTE RESOLUTION

25.1  Dispute Resolution

      Except as otherwise set out, in the event that at any time during the term
      of this Agreement, a disagreement, dispute, controversy or claim should
      arise relating to the (i) interpretation of or performance under this

                                       24

      Agreement or the attribution of liability or breach thereof; or (ii)
      scientific or technical issues in connection with Nordion or Molecular
      Insight Pharmaceuticals' performance under this Agreement, the parties
      will attempt, in good faith, to resolve their differences for a period of
      thirty (30) days following written notice from one party to the other
      specifying such dispute(s). In the event the parties are unable to work
      out a resolution of the issue during such 30-day period, either party
      shall be free to take any action and seek any remedy it may have at law or
      in equity including specific performance and injunctive relief.

                       ARTICLE 26 - INDEPENDENT CONTRACTOR

26.1  No Joint Venture

      The parties agree that with respect to the transactions contemplated
      herein that they shall both be acting as independent contractors and
      nothing herein shall constitute the parties as entering into a joint
      venture or partnership, nor shall anything herein constitute either party
      as an agent of the other for any purpose whatsoever.

                            ARTICLE 27 - SEVERABILITY

27.1  Invalid Provisions

      If any provision or term of this Agreement is found unenforceable under
      any of the laws or regulations applicable thereto, all other conditions
      and provisions of this Agreement shall nevertheless remain in full force
      and effect. Upon such determination that any term or other provision is
      invalid, illegal or incapable of being enforced, the parties hereto shall
      negotiate in good faith to modify this Agreement to effect the original
      intent of the parties as closely as possible in a mutually acceptable
      manner, in order that the transaction contemplated hereby be consummated
      as originally contemplated to the greatest extent possible.

                             ARTICLE 28 - AGREEMENT

28.1  Entire Agreement

      This Agreement, including the Schedules hereto which are incorporated
      herein, constitute the entire agreement of the parties with respect to the
      subject matter hereof and supersedes all proposals, oral or written, and
      all negotiations, conversations, or discussions. This Agreement may not be
      modified, amended, rescinded, canceled or waived, in whole or in part,
      except by written amendment signed by both parties hereto.


25

ARTICLE 29 - LAW

30.1  Applicable Law

      This Agreement shall be governed and construed in accordance with the laws
      of the Province of Ontario, Canada, without reference to its principles on
      conflict of laws. The application of the United Nations Convention for the
      International Sale of Goods is expressly excluded.

                                       26

      IN WITNESS WHEREOF the parties hereto have executed this agreement as of

the date first above written.

MDS Nordion,                             Molecular Insight Pharmaceuticals, Inc.
a division of MDS (Canada) Inc.

By: /s/ Gerry Vantellingen              By: /s/ John W. Babich
    ---------------------------            ------------------------

#63441 v1 - Agreement/Molecular Insight/Final


SCHEDULE A

Scope of Work

                                                                                               Commence
                                         ACTIVITY                                Duration   -------------
                                         --------                                --------    Y weeks from
                                                                                  X weeks   Effective Date
                                                                                 --------   --------------
1. Activity 1 - Technology Transfer

   a) Review Customer Supplied Documentation                                         2             1
   b) Write, review and approve Preliminary Safety Analysis Report(PSAR)             3             2
   c) Experimental Design for Scale-Up                                               2             2
   d) Scale-Up to 1 Ci (up to 10 runs maximum)
      i)   Show reproducibility of procedure                                         5             5
      ii)  Increase yield to 80% after quenching and isolation
           (commercially reasonable best efforts)

      iii) Verify autoclavability of formulation. Establish excipient
               ranges

   e) Scale up to 4 Ci (up to 5 runs)                                                3            10
   f) Document experiments and archive data (HPLC traces,                            3            13
      logbooks, etc.)
   Milestone 1 : Complete Technology Transfer                                        0            16

2. Activity 2- Reformulation and Purification

   a) Develop HPLC Separation Method                                                 6             4
   b) Develop Automation: sample transfer and collection                             4             4
   c) Develop compatibility of HPLC collected fraction with                          2             4
      Formulation. Establish excipients
   d) IQ/OQ and validate autoclave.                                                  5             4
   e) IQ/OQ/PQ for HPLC and equipment.                                               6            16
   f)  Draft Master Batch Record for Molecular Insight approval.                     2            19
   Milestone 2: Complete Reformulation and Purification                              0            21

3. Activity 3- Develop Dispensing Equipment

   a) Develop dispensing setup for 30 vial capability                               10             9
      - IQ/OQ/PQ Dispensing
      - Seal and crimp

   b) Develop container/ closure system                                              8            11
      - Complete closure test and integrity
      - Complete recoverability of dose from Container Test
   c) Establish Class 100 conditions for dispensing box at vial                      1            19
      opening.


   d) IQ/OQ/PQ Shielded boxes (SB)                                                   2            20
      - calibrate gauges
      - establish airborne I-123 detection system
   e) IQ/OQ/PQ Laminar Air Flow (LAF) Assembling Area.   .                           2            20
   f) Initiate Environmental Monitoring in LAF, SB and                               3            20
      Controlled Access Room,
   Milestone 3: Complete Dispensing Equipment Development                            0            22

4. Activity 4- Develop Q.C. Test Methods

   a) HPLC Method for Final Product.                                                 4            22
      - verify                      1) BMIPP
                                    2) UDCA
                                    3) Any other identified
                                 impurities as per specifications in
                                 Schedule F.
      -   establish 1) Radiochemical Purity
                     2) Chemical purity - Quantitative method
      Note: this is a method transferred from Molecular Insight
      -   Write and approve Standard Test Method (STM)
   b) IQ/OQ/PQ Dose Calibrator                                                       2            26
       Write and Approve STM
   c) Gamma Spectroscopy                                                             1            26
      -   Calibration Protocol
      -   NIST traceability
      -   159 keV Identification (ID) for I-123
      -   Write.and approve STM
   d) Endotoxin Test (USP)                                                           1            28
      -   Dilution to overcome Inhibition/Enhancement
      -   Maximum valid dilution
      -   Qualification of test method
      -   Write and approve STM
   e) Sterility Test (USP)                                                           1            28
      -   Establish sampling size
      -   Write and approve STM
   f) Product Release Form (PRF)                                                     1            29
      -   Identify all documents necessary for batch release
   Milestone 4: Complete QC Test Methods Development                                 0            30

5. Activity 5- Validation of New Process

   a) Write and approve Master Validation Plan                                       8             4
      -    Equipment: Analytical and Process
      -    Analytical Methods
      -    Process
      -    Final Product Stability
   b) Method Transfer Validation                                                     6            30
      -    Analytical Methods
      -    References Standards (shelf-life; ID)
      -    Precursor (ID; shelf-life)


   c) Validation Protocols                                                           2            36
   d) Six Process Runs to fine tune process                                          6            28
   e) Train Operators                                                                6            28
      - 3 Production technicians

      - 3 QC/QA

      - 2 Packaging
   Milestone 5: Complete Validation of New Process                                                34

6. Activity 6- Perform GMP Equivalency Run (Validation Runs)                         3            34

   a) Perform three runs (1 Ci of I-123)                                             3            37
   b) Compile all data for validation files                                          0            40
   Milestone 6: Complete Validation Runs

7. Activity 7- Prepare Development Report

   a) Document all experimentation                                                   6            31
   b) Archive all data/logbooks                                                      6            31
   c) Write and approve Development Report                                           6            39
      - Process Description and Development

      - Master Formula

      - Impurities profiles (standards to be provided by

        Molecular Insight)
      - Excipient Ranges

      - Final Product Specifications

      - Scale-Up rationale

      - Equivalence to previous formulation ( to be done in
        conjunction with Molecular Insight at their cost)

      - Qualification of Reference Standards to be done by
        Molecular Insight

      - Precursor made under cGMPs to be provided by
        Molecular Insight

      - Analytical Method and Validation to be done by
        Molecular Insight

      - Bioburden Profiles for Raw Material

      - Environmental data - house isolates

      - Molecular insight to provide stability indicating
        methods for final product

      - Define Utilities

      - Cleaning Protocol
   Milestone 7: Submit Development Report                                                         45

8. Activity 8- DMF / CMC Package

   a) Provide SOPs/STMs for CMC section of NDA                                       3            37
   b) Provide flowcharts                                                             3            37


   c) Establish Review and Approval responsibility for                               3            37
      documents
   d) Establish Recall procedure                                                     3            37
   e) Establish responsibilities of                                                  3            37
      1) Deviations

      2) Change Control

      3) Product Release

      4) Failure Investigation

      5) Out-of-Spec Investigation

      6) Draft required procedures

   Milestone 8: DMF/CMC Package Complete                                                          40

9. Activity 9- Prepare for PAI

   a) audit for cGMP compliance (with customer)                                      3            40

   b) Review findings and establish action plan                                      3            40

   c) Review costs of ongoing and enhanced compliance (to be                         3            40
      billed to Molecular Insight as required)

      NOTE: PAI readiness will
      require additional staffing and/or consultants that will be charged
      to Molecular Insight.
   Milestone 9: Ready for PAI                                                                     43

Pcdocs 62635


SCHEDULE B

FACILITY RESOURCES FOR CONTRACT MANUFACTURE OF BMIPP

THE FOLLOWING EQUIPMENT IS USED TO MANUFACTURE BMIPP:

- Laminar Flow Hood for reagent and equipment preparation

- Three Lead shielded glove boxed with HEPA filtration and Nuclear Ventilation

- Box 1 reaction, separation, formulation box containing semi-preparative automated HPLC for drug substance isolation

- Box 2 has the function to act as a dispensing area. The dispensing environment is class 100

- Box 3 is the terminal sterilization box containing an autoclave and a remote handling ball and tong manipulator

- Specialized shielding assemblies are used for the safe transport of formulated unit dose radiopharmaceuticals

- Fume hood with nuclear ventilation for QC analysis

- HPLC equipment for QC analysis

- Dose calibrator

- Particle check station

- Gamma Spectroscopy system

- Refrigerator

SOME GENERAL FEATURES OF THE MANUFACTURING AREA AND SUPPORT SERVICES ARE:

- The room is environmentally and radiation monitored

- There are waste handling systems in place to deal with chemical waste streams as well as solid and liquid radioactive wastes

- The entire manufacturing environment is cGMP regulated

- Qualified and trained staff with experience in diagnostic radiopharmaceutical manufacture are employed

- The entire manufacturing facility is supported by a calibration department

- A fully outfitted microbiology lab is available for microbiological and environmental tests (Most importantly LAL tests for pyrogenicity)

- There is an attached microbiology clean room used for sterility tests and filtration.

- This clean room contains a class 100 glove box.

NOTE: EQUIPMENT OTHER THAN THAT LISTED ABOVE (SUCH AS HOT CELLS ETC.) MAY BE USED DURING DEVELOPMENT


SCHEDULE C

BMIPP PRECURSOR SPECIFICATIONS

Note: 1. Supplied by Molecular Insight Pharmaceuticals and MDS Nordion to do identification only


SCHEDULE D

REFERENCE STANDARDS SPECIFICATIONS

Note: 1. Supplied by Molecular Insight Pharmaceuticals and MDS Nordion to do identification only


SPECIFICATION SHEET

TCI America, 9211 N Harborgate St,
Portland, OR 97203 Version Date 3/7/02 Form No. :SS. 057.02

Material BMIPP (INACTIVE COMPONENT/PRECURSOR) Code No.: Z3398

Formula: C(22)H(35)IO(2) Molecular Wt.: 458.42 CAS No.: 116754-87-1

Synonym(s): 15-(p-Iodophenyl)-
3-methylpentadecanoic Acid Storage Conditions:<or=4C(degree)

Frequency             Test                                 Acceptance Criteria                        Test Procedure
------------------    ----------------------------------   ---------------------------------------    -----------------------
0,3,6,9, 12,          Appearance                           Colorless or white crystals or powder      SLT QC 339
18,24,36,
48, 60mo

0-60 months           Identification              FTIR     Identical to reference standard            SLT QC 327

After manufacture                                 UV-VIS   Identical to reference standard            SLT QC 371

0 - 60 months                                     HPLC     Retention time corresponds with that of    SLT QC 358
                                                           the reference standard within +/- 3%

0-60 months           Purity Assay (HPLC)                  > or = 95%                                 SLT QC 358

After manufacture     Purity, Melting point                51-56(degree)C                             SLT QC 322

After manufacture     Purity, Water analysis (KF)          Report results                             SLT QC 329

0 - 60 months         Impurities, HPLC Related             < or = 2.0 % any single species            SLT QC 358

0 - 60 months         Methyl 15-(p-Iodophenyl)-3           < or = 0.1%                                SLT QC 358
                      Methylpentadecanoate

After manufacture     Heavy metals                         < or = 20 ppm                              SLT QC 332 (Method II)

After manufacture     Residual Solvents

                                   Hexane                  < or = 290 ppm                             SLT QC 340

                                   Methanol                < or = 3000 ppm                            SLT QC 340

                                   Ethyl Acetate           < or = 5000 ppm                            SLT QC 340

                                   Ethanol                 < or = 5000 ppm                            SLT QC 340

                                   Isopropanol             < or = 5000 ppm                            SLT QC 340
After manufacture     Organic Volatile Impurities

                                   Methylene Chloride      < or = 500 ppm                             SLT QC 340


SCHEDULE E

BMIPP SPECIFICATIONS


SPECIFICATION SHEET Page 1 of 1

DRUG PRODUCT SPECIFICATION SHEET

Molecular Insight, 160 Second ST, Cambridge, MA      Version Date       (ACTIVE COMPONENT)
02142                                                 4/13/04

Material [(123)I]-BMIPP CODE NO.: MIP 1000

Formula: C(22)H(35)IO(2) Molecular Wt.: 454.42 CAS No.: 116754-87-1

Synonym(s): [(123)I]-15-(p-Iodophenyl)-3-methylpentadecanoic Acid

            TEST                  ACCEPTANCE CRITERIA          TEST METHOD                TESTING SCHEDULE
Appearance                     Clear, Colorless Solution       Visual observation         Test Completed prior
                                                               STM 12                     to release of drug
Radionuclide Identity      Gamma-Photon emission at 159 +/-    Gamma ray Spectroscopy,    Test Completed prior
                            5 keV                              STM 23
                                                                                          to release of drug
Radionuclide Impurity      <or= 2.5% I-125 at TOC              Gamma ray Spectroscopy,    Confirmation Test of
                           <or= 110 (mu)Ci/mL I-125 at TOC     STM 21                     component Nal, After
                                                                                          decay of I-123, 2
                                                                                          weeks after release
Radioactivity                     3.6 to 4.4 mCi/mL            Dose Calibrator            Test Completed prior
Concentration                                                  STM 27                     to release of drug
Radiochemical Identity*       R(r) value between 0.30 to       Normal phase TLC           Test Completed prior
                              0.50
                                                               STM 16                     to release of drug
Radiochemical Purity            >95% as I-123-BMIPP            Reverse phase HPLC         Test Completed prior
                                                               Radiometric detector       to release of drug
                                                               STM 17
Chemical Concentration            0.36 to 0.44 mg/ml           Reverse phase HPLC         Test Completed prior
                                                               UV-VIS detector            to release of drug
                                                               STM 17
Radiochemical Impurity         <or= 5% as free I-123           Reverse phase HPLC         Test Completed prior
                                                               Radiometric detector       to release of drug
                                                               STM 17
Radiometric Assay for       4.5 to 5.5 mCi per (1.25 mL)       Dose Calibrator            Test Completed prior
unit dose vial              at TOC
Osmolarity                                                     STM 11                     to release of drug
                                Ratio to Saline 0.8 to         Osmometer, compare with    Test Completed prior
                                  1.0                          normal saline
                                                               STM 18                     to release of drug

pH                                 Range 8.2 to 9.2            pH paper                   Test Completed prior
                                                               STM 19                     to release of drug
Bacterial Endotoxin        <or=4.0 EU/ml                       Limulus Amebocyte Lysate
                                                               test on diluted drug
                                                               product                    Test Completed prior
                                                               STM 14                     to release of drug

Sterility                  No turbidity or growth              2 week incubation in       Test initiated
                                                               Fluid Thioglycollate       within 24 hours of release
                                                               Medium &
                                                               Trypticase Soy Broth
                                                               STM 13
Package Inspection         No damage                           Visual                     Test Completed prior
                                                               STM 15                     to release of drug

Note: All STM numbers will be changed to equivalent MDS Nordion document numbers.

* This TLC test may be replaced by HPLC.

TOC = Time of Calibration; 1500 h PT, one day after manufacture


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

PRICE SCHEDULE F

1. FACILITY ESTABLISHMENT FEE:

This is a one-time fee for the establishment of the facility described in Schedule B.

PRICE: $[*******] US

Note: Fee is payable upon signing of the Agreement

2. MILESTONES PAYMENTS:

   MILESTONE                   DESCRIPTION                  PRICE US$
   ---------                   -----------                  ---------
Milestones 1 & 2     Technology Transfer &                  $[*******].
                     Reformulation and Purification

Milestone 3          Dispensing Equipment                   $[*******].

Milestone 4          QC Test Methods                        $[******].

Milestone 5          Validation of New Process              $[*******].

Milestone 6          GMP Validation Runs                    $[******].

Milestone 7          Development Report                     $[******].

Milestone 8          DMF/CMC Package for                    $[******].
                     BMIPP

Milestone 9          Prepare for PAI                       Not included at this
                                                     time - estimated $[******].

Notes - [***] of each Milestone payment is due upon signing of the Agreement, [***] when the specific Milestone is commenced and the remainder of each Milestone Payment is due upon completion of the Milestone.

3. BATCHES FOR PHASE III CLINICAL SUPPLY:

     Price: US$ [******]. per Batch

     Notes - a)   Batch runs are ~30 doses of BMIPP of which 20 are shippable

             b)   Payment is due within 30 days of the date appearing on
                  Nordion's invoice.

Pcdocs62680


                           447 March Road               Tel: +1 613 592 2790
                           Ottawa, ON K2K 1X8           Fax: +1 613 592 6937
                           Canada                       www.mds.nordian.com

[MDS NORDION LOGO]
  Science Advancing Health

May 25, 2005

Molecular Insight Pharmaceuticals Inc.
160 Second Street
Cambridge, Massachusetts
02142
USA

Dear Sirs:

RE: AMENDMENT #1 TO AGREEMENT BETWEEN MDS NORDION, A DIVISION OF MDS (CANADA) INC. (SUCCESSOR TO MDS NORDION INC.) AND MOLECULAR INSIGHT PHARMACEUTICALS

INC. DATED THE 14th DAY OF JUNE, 2004

Reference is made to the agreement between MDS Nordion and Molecular Insight Pharmaceuticals Inc., dated the 14th day of June 2004 (the "Agreement").

In consideration of $1.00 and other valuable consideration the receipt of sufficiency of which is hereby acknowledged, the parties desire to extend the terms of the Agreement.

Section 16.1 of the Agreement shall be amended in its entirety and shall read as follows:

"The term of this Agreement shall commence upon the Effective Date, and unless terminated earlier pursuant to this Agreement, shall expire on December 31, 2006."

All other terms and conditions in this Agreement shall remain in full force and effect.

The foregoing amendment shall be effective as of the date first written above.

If you agree with the foregoing, please execute this agreement in the space provided below.

Sincerely,

                                          We agree this 25th day of May, 2005
MDS NORDION                               MOLECULAR INSIGHT PHARMACEUTICALS INC.

Per: /s/ Gerry Vantellingen               Per: /s/ John E. McCray
     ----------------------------                 ------------------------------
     Name: Gerry Vantellingen                     Name: John E. McCray
     Title: Vice President, Sales                 Title: Chief Operating Officer


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.14

RESEARCH AGREEMENT
AND EXCLUSIVE LICENSE

Effective as of December 29, 1997, GEORGETOWN UNIVERSITY, a not-for- profit corporation of the District of Columbia, having a principal address of 37th & "O" Streets, N.W., Washington, D.C. 20057 ("LICENSOR"), and ZEBRA PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 38 Hartman Road, Newton, Massachusetts 02159 ("LICENSEE") agree as follows:

1. BACKGROUND

1.1 -- LICENSOR is the owner by assignment of inventions directed generally to cocaine analogs, and specifically piperidine analogs thereof (the "Invention(s)").

1.2 -- LICENSOR wishes to have the Invention(s) and related technologies perfected and marketed at the earliest possible time in order that products resulting therefrom may be available for public use and benefit.

1.3 -- LICENSEE wishes to acquire a license under said Invention(s) and Licensed Patent(s), for the purpose of undertaking development, to manufacture, use, and sell Licensed Produce(s) in the Licensed Field of Use.

2. DEFINITIONS

2.1 -- "Patent Rights" refers to LICENSOR's rights arising from Provisional U.S. Patent Application Serial No. 60/042,775, filed April 7, 1997, entitled "Analogs of Cocaine" and naming as inventors Alan P. Kozikowski and Gian Luca Araldi, including the information contained in said application with respect to the Invention(s), any foreign patent applications corresponding thereto, any divisions, continuations, reissues, or reexaminations thereof, and any patent(s) issuing or granted therefrom. Such patent application(s) are the "Licensed Application(s)" and any resulting issued patents are the "Licensed Patent(s)."

2.2 -- "Technology" means any existing technical data and information provided to LICENSEE by LICENSOR or its employees or contractors relating to Invention(s), including, without limitation, any biochemical, preclinical, clinical, manufacturing, formulation, and scientific research information of a confidential nature.

1

2.3 -- "Licensed Product(s)" means any compound, product or part thereof in the Licensed Field of Use, the manufacture, use, or sale of which:

(a) is covered by a valid claim of an issued, unexpired Licensed Patent(s) directed to the Invention(s). A claim of an issued, unexpired Licensed Patent(s) shall be presumed to be valid unless and until it has been held to be invalid by a final judgment of a court of competent jurisdiction from which no appeal can be or is taken;

(b) is covered by any claim being prosecuted in Licensed Application(s).

2.4 -- "Net Sales" means the gross revenue of the Licensed Product(s) in the form in which it is sold or used, whether or not assembled (and without excluding therefrom any components or subassemblies thereof, whatever their origin and whether or not patent impacted) less the following items:

(a) Import, export, excise, value added and sales taxes, plus custom duties;

(b) Costs of insurance, packing, and transportation from the place of manufacture to the customer's premises or point of installation;

(c) Normal and customary quantity and cash discounts, and

(d) Credit for returns, allowances, or trades actually given.

2.5 -- "Licensed Field of Use" means therapeutic and diagnostic uses of transporters for neurotransmitters, including dopamine, serotonin and norepinephrine, for substance abuse, obesity, depression, Parkinson's disease, and related neuro psychological conditions or diseases.

2.6 -- "Exclusive" means LICENSOR has not granted and shall not grant further licenses in the Licensed Field of Use, so long as this Agreement is fully operative.

2.7 -- "Regulatory Approval" means any approval or clearance by any governmental agency or agencies having authority to regulate the use or sale of any Licensed Product(s) in the pertinent jurisdiction or territory.

2.8 -- "LICENSEE" is understood to include all of its Affiliates. An Affiliate of LICENSEE shall mean any corporation or other business entity controlled by, controlling, or under common control with LICENSEE as of the date of this Agreement. For this purpose, "control" means direct or indirect beneficial ownership:

(a) Of at least fifty percent (50%) of the voting stock; or

(b) Of at least fifty percent (50%) interest in the income of such corporation or other business.

2

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

3. RESEARCH AGREEMENT

3.1 -- LICENSOR shall perform pre-clinical pharmacology and new compound synthesis sufficient to identify, if feasible, a lead compound suitable for development into a Licensed Product. (see attached Statement of Work and Budget)

3.2 -- Within two months of execution of this agreement, LICENSEE agrees to pay to LICENSOR its costs, including overhead, incurred to-date in connection with the preparation, filing and prosecution of the Licensed Applications, which costs have been estimated by LICENSOR to be $2,500.

3.3 -- LICENSEE shall fund the LICENSOR's research as follows:

(a) LICENSEE shall pay to LICENSOR, upon execution of this Agreement, an initial amount of $[******], which shall fund LICENSOR's initial year of research.

(b) On the first day of both the 12th and 24th full calendar months after the execution of this Agreement, LICENSEE shall pay to LICENSOR $[*****] to fund an additional year of research, unless LICENSOR and LICENSEE agree that such additional research is not necessary.

(c) If at any time LICENSOR shall determine that any of the above sums are inadequate to fund the research or other work necessary to permit the development of a Licensed Product, it shall notify LICENSEE of the amount that LICENSOR reasonably believes will be necessary to fund the remaining research. LICENSEE shall then have 60 days to notify LICENSOR, in writing, whether it is willing to agree to provide such additional amounts. If LICENSEE does not agree to provide such amounts, then either party may terminate this Agreement by written notice to the other. Such termination will not apply to any previously developed Licensed Products.

3.4 -- LICENSEE shall perform all toxicological, Phase I, Phase II or other tests or studies necessary to obtain approval of a NDA and shall prepare, prosecute and file any IND or NDA necessary to secure approval of all feasible Licensed Products based on the Invention(s), Patent Rights or Technology in the Licensed Field of Use. Upon notification from LICENSOR, as to any prospective product, that LICENSOR has completed its research pursuant to paragraph 3.1, LICENSEE shall promptly begin such studies and tests and diligently proceed with them until approval has been obtained for all feasible Licensed Products. LICENSEE shall thereafter use its best efforts to market, promote, manufacture and sell any Licensed Products developed pursuant to this Agreement. If LICENSEE determines that a potential Licensed product is not feasible, it

3

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

shall notify LICENSOR. Such notification shall relinquish any rights of LICENSEE in said Licensed Product. Any dispute between the parties as to the feasibility of a Licensed Product shall be resolved pursuant to Article 16 below.

3.5 -- LICENSEE shall provide to LICENSOR, at least semi-annually, a written report comprehensively describing its progress toward fulfillment of its obligations pursuant to paragraph 3.4. If LICENSEE fails to make continuous and reasonable progress toward the development of each feasible Licensed Product, LICENSOR may notify LICENSEE of its dissatisfaction. In such event, LICENSOR and LICENSEE shall negotiate in good faith in an attempt to resolve the basis for such dissatisfaction. Should LICENSOR remain dissatisfied 30 days after such notification, LICENSOR may, in its sole discretion, terminate this Agreement.

4. GRANT

4.1 -- LICENSOR hereby grants and LICENSEE hereby accepts a worldwide license in the Licensed Field of Use to make, have made, use, and sell Licensed Product(s).

4.2 -- Said license, which includes the right to sublicense, shall be Exclusive in the Licensed Field of Use.

5. ROYALTIES

5.1 -- (a) LICENSEE shall pay LICENSOR $[******] upon execution of this Agreement;

(b) LICENSEE shall pay to LICENSOR benchmark royalties relating to each Licensed Product as follows:

(1) $[*******] within 30 days after the IND approval;

(2) $[*******] within 30 days after commencement of Phase I tests;

(3) $[*******] within 30 days after commencement of Phase II tests;

(4)$[*******] upon filing and an additional $[*******] upon approval of the NDA.

LICENSEE may investigate more than one Licensed Product through Phase II tests, without paying more than one set of benchmark royalties. If LICENSEE should choose to submit multiple NDAs or an NDA covering more than one Licensed Product, then the benchmark royalties relating to additional Licensed Products shall be reduced by [**]%. If, after obtaining approval of an NDA, LICENSEE attempts to develop additional

4

Licensed Products, benchmark royalties relating to such products will by reduced by 50%.

5.2 -- In addition, LICENSEE shall pay LICENSOR earned royalties on Net Sales by LICENSEE of [*****] percent ([*]%). LICENSEE shall pay to LICENSOR, as royalties relating to any sublicense, the greater of (a) [*]% of Net Sales by such sublicensee or (b) [*************************] percent ([****]%) of any compensation LICENSEE receives from the sublicensee. If the Licensed Product is solely for diagnostic use in the Licensed Field of Use, LICENSEE shall pay LICENSOR earned royalties on Net Sales by LICENSEE or any sublicensee of [***] percent ([*]%).

5.3 -- The royalty on sales in currencies other than U.S. Dollars shall be calculated using the appropriate foreign exchange rate for such currency quoted by the Wall Street Journal, on the close of business on the last banking day of each calendar quarter. Royalty payments to LICENSOR shall be in U.S. Dollars.

5.4 -- In the event that the Patent Rights relating to a particular Licensed Product are finally determined or adjudged by the Patent and Trademark Office or a court of competent jurisdiction to be unpatentable or invalid, or upon the expiration of the last patent covering such Licensed Product, LICENSEE shall be entitled to a [**]% reduction in all royalties related to such Licensed Product accruing pursuant to this Article 5, commencing on the effective date of such determination, judgment or expiration.

6. REPORTS, PAYMENTS, AND ACCOUNTING

6.1 -- Quarterly Royalty Payment and Report --LICENSEE shall make written reports and royalty payments to LICENSOR within ninety (90) days after the end of each calendar quarter following the first commercial sale. This report shall state the number, description, and aggregate Net Sales of Licensed Produce(s) during such completed calendar quarter, and resulting calculation of earned royalty payment due LICENSOR for such completed calendar quarter. Concurrent with the making of each such report, LICENSEE shall include payment due LICENSOR of royalties for the calendar quarter covered by such report.

6.2 -- Accounting -- LICENSEE agrees to keep records for a period of two (2) years showing the manufacturing, sales, use, and other disposition of products sold or otherwise disposed of under the license herein granted in sufficient detail to enable the royalties payable hereunder by LICENSEE to be determined, and further agrees to permit its books and records to be examined by LICENSOR from time to time to the extent necessary to verify reports provided for in Paragraph 5.1. Such examination is to be

5

made by LICENSOR, at its expense. If LICENSOR determines that LICENSEE has, for any reason, failed to pay adequate royalties, LICENSEE shall immediately upon notice thereof pay to LICENSOR any owed royalties plus interest at the rate of eleven percent (11% per annum, compounded daily, calculated from the date upon which such royalties should have been paid to the date of actual payment of LICENSOR).

7. WARRANTY

LICENSOR represents and warrants that it has not granted the Patent Rights or any rights in any Licensed Product(s) to any third party, except for United States government rights which may have been required by law. LICENSOR also represents and warrants that, to the best of LICENSOR'S knowledge, information and belief, the Invention(s) are novel.

8. INFRINGEMENT

8.1 -- LICENSEE shall notify LICENSOR of any suspected infringement of the Patent Rights by a third party.

8.2 -- In the event that information becomes known to or is brought to the attention of LICENSEE that others without license are unlawfully infringing upon rights granted to LICENSEE pursuant to this Agreement, LICENSEE shall diligently prosecute any infringer at LICENSEE's cost and expense. LICENSEE arid LICENSOR acknowledge and agree that, although LICENSOR shall have the right at LICENSOR'S option to prosecute infringers, LICENSOR is not desirous of being a party to any such infringement suit. LICENSEE shall not join LICENSOR as a party-plaintiff to any suit which LICENSEE may institute unless necessary for the maintenance of said suit, and then only with the prior knowledge and written consent of LICENSOR. In such event, LICENSOR shall not be chargeable for any costs or expenses. LICENSOR shall execute all documents necessary for the prosecution of any infringement suit brought by LICENSEE and provide other such support as LICENSEE may require, all however at the expense, with respect to travel and the like, of LICENSEE. LICENSEE is under no obligation to defend an action brought by a third party alleging that the Patent Rights infringe an issued U.S. patent or to defend a declaratory judgment action brought by a third party asserting that the Patent Rights are invalid as anticipated by, or obvious over, prior art.

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8.3 -- In the event that LICENSOR decides to institute suit, it shall notify LICENSEE in writing. LICENSEE's failure to notify LICENSOR in writing, within thirty (30) days after the date of notice, that it will join in enforcing the patent pursuant to the provisions hereof, shall be deemed conclusively to be LICENSEE's assignment to LICENSOR of all rights, causes of actions, and damages resulting from any such alleged infringement, and LICENSOR shall be entitled to retain the entire amount of any recovery or settlement. Furthermore, at its option, LICENSOR may join LICENSEE as plaintiff.

8.4 -- LICENSOR shall be entitled to the percentage of any recovery obtained in any infringement suit brought by LICENSEE equal to the amount to which LICENSOR would be entitled under the sublicensee royalty provision of this Agreement had said recovery been paid to LICENSEE as sublicense royalties by the defendant in said infringement suit. LICENSEE may deduct its reasonable costs and attorneys fees incurred in prosecuting such suit, to the extent such costs and fees are not otherwise recovered, prior to calculating the share owing to LICENSOR pursuant to this provision.

8.5 -- Should either LICENSOR or LICENSEE commence a suit under the provisions of Paragraphs 8.2 or 8.3 and thereafter elect to abandon the same, it shall give timely notice to the other party which may, if it so desires, continue prosecution of such suit; provided, however, that the sharing of expenses and any recovery in such suit shall be agreed upon between LICENSOR and LICENSEE.

9. PROSECUTION OF LICENSED PATENTS

9.1 -- LICENSEE agrees to accept liaison and financial responsibilities, as hereinafter set forth, for the prosecution, by a patent lawyer in independent practice, who shall be nominated by LICENSEE and approved by GEORGETOWN, of the Licensed Applications. Said financial responsibilities shall not only include the costs of prosecution but also the payment of maintenance fees, where required, to maintain said patent applications and patents, if issued, in force and effect for as long as possible. It is further agreed that the patent lawyer selected by LICENSEE and approved by GEORGETOWN shall be required, if so desired by GEORGETOWN, to keep a patent lawyer selected by GEORGETOWN informed of all steps in the prosecution and maintenance of said Patent Rights. Written approval will be required from GEORGETOWN to the patent lawyer selected by LICENSEE for actions concerning this patent.

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9.2 -- Within two (2) weeks of notification to GEORGETOWN by LICENSEE of the identity of the patent lawyer, GEORGETOWN will furnish to the patent lawyer nominated in accordance with paragraph 9.1 above:

(a) Complete file histories of all of the patent applications constituting said Licensed Applications; and

(b) An executed power of attorney or powers of attorney appointing such patent lawyer as attorney of record in connection with all of said Licensed Applications.

9.3 -- GEORGETOWN shall have the right at any time, by notice in writing and sent to LICENSEE by registered mail, to assume and continue at its own expense, direction of the prosecution of any of said Licensed Applications. Upon receipt by LICENSEE of any such notice from GEORGETOWN, LICENSEE and the patent lawyer nominated in accordance herewith shall provide in two weeks from the time of notice an executed power of attorney and all the file histories of the patent applications constituting said Licensed Applications. Upon receipt of this documentation, LICENSEE and the patent attorney nominated by LICENSEE shall be relieved of all future responsibilities to prosecute the Licensed Applications to which the notice is directed. If, for any reason, prosecution is to be abandoned by LICENSEE, GEORGETOWN will be notified in sufficient time to assume prosecution. LICENSEE shall bear all cost to maintain the patent prosecution until such time that Georgetown can assume patent prosecution.

10. TERMINATION

10.1 -- LICENSOR may terminate this Agreement:

(a) if LICENSEE is in default in payment of royalties or providing of reports; or

(b) if LICENSEE is in material breach of any provision hereof; and LICENSEE fails to remedy any such default or breach within thirty (30) days after written notice thereof by LICENSOR;

(c) pursuant to paragraph 3.3 or 3.5; or

(d) if LICENSEE is unable to provide adequate assurance of future performance within sixty (60) days of written notice of LICENSOR's reasonable belief that LICENSEE may not be able to perform its future obligations under this Agreement, whether such belief is due to LICENSEE's financial circumstances or other factors.

10.2 -- Surviving any termination are:

(a) LICENSEE's obligation to pay royalties accrued or accruable;

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(b) Any cause of action or claim of LICENSEE or LICENSOR, accrued or to accrue, because of any breach or default by the other party; and

(c) The provisions of Articles 6 and 8.

10.3 -- In the event of termination of this Agreement for any reason, any and all rights granted LICENSEE hereunder, including any rights granted by LICENSEE to any sublicensee, shall cease and terminate, and all such rights shall revert to LICENSOR. LICENSEE shall diligently thereafter return to LICENSOR, or to LICENSOR's designated attorneys, any files or other documents in its possession or in the possession of its attorneys, agents or sublicensees, relating to pending or issued Licensed Patent(s), and shall execute any and all documents necessary to return control of said Licensed Patent(s) until such time as control has properly been transferred to LICENSOR. Further, LICENSEE shall immediately return to LICENSOR all research data, biological and other material (including but not limited to licensed cell lines), prototypes, process information, clinical data, and the like of LICENSOR in its possession or in the possession of its sublicensees.

11. CONFIDENTIALITY

11.1 -- LICENSEE agrees not to disclose or transfer any technical reports, data and information provided to the LICENSEE by LICENSOR, including the contents of Licensed Applications to any person other than its employees and consultants, without prior written approval of LICENSOR. Should LICENSEE wish to disclose any such information to a third party, it shall provide LICENSOR with the identity of such party, the purpose of the disclosure, the text of the proposed disclosure and a proposed confidentiality agreement to be executed by the third party prior to disclosure of the confidential information. LICENSOR shall respond within ten working days of any such request for consent to disclosure, which consent will not be unreasonably withheld.

11.2 -- LICENSEE shall not utilize any Invention, Patent Rights or Technology in connection with any research or product development in which it may engage except pursuant to this Agreement. Upon request, LICENSEE shall permit LICENSOR access to its records and facilities sufficient to confirm whether such use is occurring.

11.3 -- LICENSEE shall not use LICENSOR's name or refer to LICENSOR in any promotion, marketing or solicitations without providing LICENSOR a copy of any such proposed use or reference and obtaining LICENSOR's prior approval in writing.

11.4 -- LICENSOR shall have the right to distribute information relating to the Invention(s) to (i) academic investigators at not-for-profit institutions for non-commercial

9

research purposes, and (ii) third parties for the purpose of obtaining chemical, physical, or biological analysis or characterization of any information necessary for furtherance of LICENSOR's academic research. Nothing in this Paragraph shall limit the right of LICENSOR to disclose any information which, through no fault of LICENSOR, becomes generally available to the public.

11.5 -- Nothing in this Agreement shall limit in any way LICENSOR's ability to undertake (i) the filing of any report required by any public authority, or (ii) the non-public disclosure and discussion of information between investigators and their academic colleagues.

12. PUBLICATION RIGHTS

12.1 -- LICENSOR shall have the right to publish, disclose and disseminate ("Right to Publish") in whole or in part, any data and information related to the Invention(s). LICENSEE agrees that it shall not under any circumstances use the name or names of the LICENSOR or of its employees or contractors, or any adaptation thereof, (i) in any advertising, promotional, or sales literature, securities prospectus, press release or other publicity relating to any invention, discovery or other commercially exploitable product or process, (ii) on any invention, discovery or other commercially exploitable product or process, or (iii) generally on any matter arising out of this Agreement, without prior written consent of LICENSOR.

13. ASSIGNMENT

LICENSEE may not assign any right or delegate any obligation under this Agreement without the prior written consent of LICENSOR. Consent of the LICENSOR shall not be unreasonably withheld with respect to publicly traded companies. Any change in the ownership interests in LICENSEE that exceeds 50% within a one-year period shall be deemed an assignment.

14. INDEMNIFICATION

14.1 -- LICENSEE agrees that during the term of this Agreement and thereafter, it will indemnify, defend and hold GEORGETOWN, its trustees, officers, employees and affiliates, harmless against all claims and expenses, including legal expenses and attorneys' fees, arising out of the death of or injury to any person or persons, or out of any damage to property, and against any other claim, proceeding, demand, expense and

10

liability of any kind whatsoever resulting from the production, manufacture, sales, use, consumption or advertisement of Licensed Products by LICENSEE.

15. NOTICES

All notices under this Agreement shall be deemed to have been fully given when done in writing and deposited in the United States mail, registered or certified, and addressed as follows:

To LICENSOR:                                            To LICENSEE:
GEORGETOWN UNIVERSITY                                   ZEBRA PHARMACEUTICALS
Director                                                Attn: David Elmaleh
Office of Technology Transfer                           38 Hartman Road
2115 Wisconsin Avenue, N.W.                             Newton, MA 02159
Suite 108
Washington, D.C. 20007

Either party may change its address upon notice to the other party as provided herein.

16. DISPUTE RESOLUTION

Should the parties hereafter have any dispute as to their obligations pursuant to this Agreement, they shall first attempt to resolve such dispute among themselves. If such efforts are not successful, the exclusive method for resolving such a dispute shall be arbitration as described herein.

Either party may elect to submit the issue to arbitration by giving written notice to the other party and naming an arbitrator. The other party will then have 30 days to select its own arbitrator. Once both arbitrators have been selected they shall meet within 30 days of the appointment of the second arbitrator and select a third arbitrator mutually agreeable to them.

If the dispute relates to the scope of the Patent Rights, Field of Use or Technology or the feasibility of a Licensed Product, then all arbitrators selected pursuant to this provision shall have adequate scientific qualifications, including an advanced degree in a field related to biochemistry and significant research experience.

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Once the patent of arbitrators have been chosen, they shall conduct an arbitration on the disputed issue or issues in accordance with the Commercial Arbitration Rules of the American Arbitration Association. The third arbitrator shall serve as the presiding arbitrator, although, in the event of dispute among the arbitrators, the majority decision of the arbitration panel shall be binding. The decision of the arbitrators shall be final and either party may apply to a court located in the District of Columbia to enter judgment based on the arbitrator's decision. All costs of the arbitrators and the arbitration, other than the respective parties' attorneys' fees and costs, shall be borne equally by the parties.

17. WAIVER

None of the terms, covenants, and conditions of this Agreement can be waived except by the written consent of the party waiving compliance.

18. APPLICABLE LAW

This Agreement shall be construed, interpreted, and applied in accordance with the laws of the District of Columbia and applicable federal laws.

19. ENTIRE AGREEMENT

This writing constitutes the entire agreement of the parties and there are no promises, understandings, or agreements of any kind pertaining to this agreement other than those written in this agreement.

[Signatures follow on page 13]

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IN WITNESS WHEREOF the parties thereto have executed this Agreement in duplicate originals by their duly authorized officers or representatives.

Date 12-5-97 Date 12/18/97

For GEORGETOWN UNIVERSITY                      For XEBRA PHARMACEUTICALS

By : /s/ Gregory B. Raymond                    By : /s/ David Elmaleh
     ----------------------                         -----------------------
     Gregory B. Raymond                              David Elmaleh, Ph.D.
     Acting Chief Operating Officer                 President

/s/ Arthur Raines
--------------------------------------
Arthur Raines, Ph.D.
Acting Associate Dean for Research Operations

/s/ Wm. Jack Hartman
--------------------------------------
Wm. Jack Hartman
Director of Research Grants and Contracts

/s/ Carol Tracy Carr
--------------------------------------
Carol Tracy Carr, Esq.
Director, Office of Technology Transfer

13

STATEMENT OF WORK CONCERNING THE RESEARCH
CONTRACT BETWEEN GU AND ZEBRA PHARMACEUTICALS.

PREPARED BY PROFESSOR KOZIKOWSKI, GU MEDICAL CENTER

Immediate therapies are needed for the treatment of cocaine abuse worldwide. In this direction, we have recently identified a piperidine-based analog of cocaine (specifically, the trans isomer of 1-methyl -4-(4-chlorophenyl)piperidine-3-carboxylic acid methyl ester) that binds to the cocaine recognition site with comparable affinity to cocaine; additionally, this compound acts as an inhibitor of dopamine uptake. In spite of the compound's potency, it has been observed that in discrimination studies in rats, the compound exhibits only weak cocaine- and amphetamine-like effects. Unlike cocaine, this compound has weak motor stimulant effects and is not self-administered by rats. These results appear to be promising from the standpoint of discovering a possible medication for drug abuse treatment. In order to properly follow up on these encouraging preliminary results, it is our plan to conduct further chemical analog synthesis, in vitro pharmacological studies, and in vivo animal experiments on the 4-phenylpiperidine analogs with the objective to improve upon the biological profile of this compound.

Within the context of the research contract with Zebra Pharmaceuticals, it is our intention to pursue the following specific aim:

To conduct additional structure-activity relationship studies in this piperidine series in order to establish that we are advancing the best compound as a possible medication. These studies would include preparation of the lead structure in larger amounts in optically pure form, and the design and synthesis of related analogs embodying the following structural changes: a) modification of the nature and position of the substituent borne by the


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Phenyl ring; b) replacement of the N-methyl group by other alkyl groups and sulfonyl groups, as well as isosteric replacement of NMe by CH(2) and O; c) replacement of the ester group by alkyl and alkenyl groups.

A budget that reflects how the initial one year budget of $[******] will be spent is attached.


AMENDMENT TO RESEARCH AGREEMENT AND EXCLUSIVE LICENSE

Dated October 27, 2005

Between Molecular Insight Pharmaceuticals, Inc. (formerly designated in the above referenced Agreement as Zebra Pharmaceuticals) and Georgetown University.

This Amendment serves to modify the Agreement entered into December 29, 1997 for Patent Rights and Technology related to US Patent Application Serial No. 60/042,775 (filed April 7, 1997) entitled "Analogs of Cocaine", as well as any foreign applications corresponding thereto, and any divisions, continuations, or any reexaminations thereof, and will be enforceable on the date of the last signature of this Second Amendment.

Molecular Insight Pharmaceuticals, Inc. and Georgetown University agree that the following provisions in the above referenced agreement shall be modified as follows:

PREAMBLE

The Agreement preamble formerly reciting:

Effective as of December 29, 1997, GEORGETOWN UNIVERSITY, a not-for-profit corporation of the District of Columbia, having a principal address at 37th & O Streets, N.W., Washington, D.C. 20057 ("LICENSOR") and ZEBRA PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 160 Second St., Cambridge, Massachusetts 02142 ("LICENSEE"), agrees as follows:

Shall be replaced by:

Effective as of December 29, 1997, GEORGETOWN UNIVERSITY, a not-for-profit corporation of the District of Columbia, having a principal address at 37th & O Streets, N.W., Washington, D.C. 20057 ("LICENSOR") and MOLECULAR INSIGHT PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 160 Second St., Cambridge, Massachusetts 02142 ("LICENSEE"), agree as follows:

2. DEFINITIONS

Section 2.1 formerly reciting:

2.1 "Patent Rights" refers to LICENSOR's rights arising from U.S. Provisional Patent Applications Serial No. 60/042,775, filed April 7, 1997 entitled "Analogs of Cocaine", and naming as inventors Alan P. Kozikowski, and Gian Luca Araldi, including the information contained in said application with respect to the Invention(s) any foreign patent applications corresponding thereto, any United States divisions, continuations, reissues, or reexaminations thereof, and any patent(s) issued or granted therefrom. Such patent application(s) are the "Licensed Application(s)" and any resulting patents are the "Licensed Patent(s)."


Shall be replaced by:

2.1 "Patent Rights" refers to LICENSOR's rights arising from U.S. Provisional Patent Application Serial No. 60/042,775, filed April 7, 1997 entitled "Analogs of Cocaine", including the information contained in said application with respect to the Invention(s) any foreign patent applications corresponding thereto, any United States divisions, continuations, continuations in-part to the extent the claims are directed to subject matter specifically described in PCT/US98/07081, reissues, or reexaminations thereof, and any patent(s) issued or granted therefrom, specifically, 6,180,648, 6,472,422 and 6,806,281, all to the extent owned or controlled by Georgetown. Such patent application(s) are the "Licensed Application(s)" and any resulting patents are the "Licensed Patents(s)."

In witness thereof, the parties have executed this Amendment on the dates indicated.

MOLECULAR INSIGHT                       GEORGETOWN UNIVERSITY
PHARMACEUTICALS, INC.

By:                                     By:    /s/ Martin A. Mullins
    --------------------------              --------------------------
Name:  John W. Babich                   Name:  Martin Mullins
Title: President and CSO                Title: Vice President
                                               Office of Technology Transfer


Date:                                   Date:     11/1/05


2

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.15

EXCLUSIVE LICENSE AGREEMENT

Effective as of 1 March 2000, GEORGETOWN UNIVERSITY, a not-for-profit corporation of the District of Columbia, having a principal address at 37th & O Streets, N.W., Washington, D C. 20057 ("LICENSOR"), and ZEBRA PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 160 Second St., Cambridge, Massachusetts 02142 ("LICENSEE"), agree as follows:

1. BACKGROUND

1.1 LICENSOR is the owner by assignment or obligation of assignment to certain Technology directed generally to Ligands for Metatrobic Glutamate Receptors and Inhibitors of NAALADase (as further defined herein).

1.2 LICENSOR wishes to have the Technology developed and marketed at the earliest possible time in order that products resulting therefrom may be available for public use and benefit.

1.3 LICENSEE wishes to acquire a license under said Technology for the purpose of undertaking development, to manufacture, use and sell Licensed Product(s) in the Licensed Field of Use.

2. DEFINITIONS

2.1 "Patent Rights" refers to LICENSOR's rights arising from U.S. Provisional Patent Applications Serial No. 60/166,915, filed 22 November 1999 "Ligands for Metatrobic Glutamate Receptors and Inhibitors of NAALADase" and Serial No. 60/131,627 filed 28 April 1999 entitled "Ligands for Metatrobic Glutamate Receptors and Inhibitors of NAALADase" and naming as inventors Alan P. Kozikowski, Jarda T. Wroblewski and Fajun Nan including any foreign patent applications corresponding thereto, any United States divisions, continuations, reissues, or reexaminations thereof, and any United States or foreign patent(s) issued or granted therefrom and any United States or foreign patents or patent applications claiming Technology. Such patent application(s) are the "Licensed Application(s)" and any resulting issued patents are the "Licensed Patent(s)."

2.2 "Technology" means any technical data, know-how, material, research results and other information provided to LICENSEE by LICENSOR or its employees or contractors relating "Ligands for Metatrobic Glutamate Receptors and Inhibitors of NAALADase" including, without limitation, any biochemical, preclinical, clinical, manufacturing, formulation, and scientific research information of a confidential nature whether patentable or unpatentable.

2.3 "Licensed Product(s)" means any compound, product or part thereof, device, method or service, the manufacture, use, or sale of which:


Page 2

(a) is covered by a valid claim of an issued, unexpired Licensed Patent(s). A claim of an issued, unexpired Licensed Patent(s) shall be presumed to be valid unless and until it has been held to be invalid by a final judgment of a court of competent jurisdiction from which no appeal can be or is taken;

(b) is covered by any claim being prosecuted in Licensed Application(s).

2.4 "Net Sales" means the gross revenue generated by sale of the Licensed Product(s) or use of the Licensed Process(es) in the form in which it is sold or used, whether or not assembled (and without excluding therefrom any components or subassemblies thereof, whatever their origin and whether or not patent impacted) less the following items:

(a) Import, export, excise, value added and sales taxes, plus custom duties;

(b) Costs of insurance, packing and transportation from the place of manufacture to the customer's premises or point of installation;

(c) Normal and customary quantity and cash discounts; and

(d) Credit for returns, allowances, or trades actually given.

2.5 "Licensed Field of Use" means any diagnostic or therapeutic use concerning "Ligands for Metatrobic Glutamate Receptors and Inhibitors of NAALADase".

2.6 "Exclusive" means LICENSOR has not granted and shall not grant further licenses in the Licensed Field of Use, so long as this Agreement is in effect.

2.7 "Regulatory Approval" means any approval or clearance by any governmental agency or agencies having authority to regulate the use or sale of any Licensed Product(s) in the pertinent jurisdiction or territory.

2.8 "LICENSEE" is understood to include Zebra and any and all of its Affiliates. An Affiliate of LICENSEE shall mean any corporation or other business entity controlled by, controlling, or under common control with LICENSEE during the term of this Agreement. For this purpose, "control" means direct or indirect beneficial ownership:

(a) of at least fifty percent (50%) of the voting stock; or

(b) of at least fifty percent (50%) interest in the income of such corporation or other business.

2.9 "First Commercial Sale" means the first sale of a Licensed Product at an arms length transaction with a third party un-Affiliated with any party to this Agreement.


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Page 3

3. GRANT

3.1 LICENSOR hereby grants and LICENSEE hereby accepts a worldwide license in the Licensed Field of Use to make, have made, use, sell, and have sold Licensed Product(s) and to use Technology.

3.2 Said license, which includes the right to sublicense, shall be Exclusive in the Licensed Field of Use.

4. ROYALTIES, PAYMENTS AND MILESTONES

4.1 During the term of this Agreement, LICENSEE agrees to assume responsibility for future patent prosecution and maintenance costs as provided in the following Article 8.1.

4.2 LICENSEE shall use good faith efforts to develop, obtain clinical approval for, manufacture, market and promote Licensed Products.

4.3 LICENSOR shall have the right to terminate or render this license nonexclusive at any time after two (2) years from the date of the license if, in LICENSOR's reasonable judgment, LICENSEE:

(i) has not put the licensed subject matter into commercial use in the country or countries where licensed, directly or through a sublicense, and is not keeping the licensed subject matter reasonably available to the public, or

(ii) is not demonstrably engaged in research, development, manufacturing, marketing or licensing program, as appropriate, directed toward this end.

In making this determination, LICENSEE shall take into account the normal course of such programs conducted with sound and reasonable business practices and judgment and shall take into account the reports provided hereunder by LICENSEE.

4.4 (a) LICENSEE shall pay to LICENSOR benchmark royalties relating to each Licensed Product as follows:

(1) $[******] within thirty (30) days after the IND approval;

(2) $[*******] within thirty (30) days after approval of Phase II tests


Page 4

(3) $[*******] within thirty (30) days after approval of Phase III tests; and

(4) $[*******] within thirty (30) days after the approval of the NDA.

LICENSEE may investigate more than one Licensed Product through Phase II tests, without paying more than one set of benchmark royalties. If LICENSEE should choose to submit multiple NDAs or an NDA covering more than one Licensed Product, then the benchmark royalties relating to additional Licensed Products as set forth in 4.3 (3) and (4) above shall be reduced by fifty percent (50%). If, after obtaining approval of an NDA, LICENSEE attempts to develop additional Licensed Products, benchmark royalties relating to such products will be reduced by 50%.

4.5 Fifty percent ([**]%) of the total milestone fees paid to Licensor by Licensee as provided in 4.4 above, shall be creditable against earned royalties as provided in 4.6 up to a maximum of fifty percent ([**]%) of such royalties until such credit is fully consumed.

4.6 In addition, LICENSEE shall pay LICENSOR earned royalties of two percent ([*]%) on Net Sales of any diagnostic Licensed Product and three percent ([*]%) on Net Sales of any therapeutic Licensed Product in the country in which the Licensed Product is made, used or sold. LICENSEE shall pay to LICENSOR, as royalties relating to any sublicense, the greater of (a) the applicable royalty as set forth above or (b) twenty percent ([**]%) of any compensation LICENSEE receives from the sublicensee.

4.7 The royalty on sales in currencies other than U.S. Dollars shall be calculated using the appropriate foreign exchange rate for such currency quoted by the Wall Street Journal, on the close of business on the last banking day of each calendar quarter. Royalty payments to LICENSOR shall be in U.S. Dollars.

4.8 In the event that the Patent Rights relating to a particular Licensed Product are finally rejected as being unpatentable by the U.S. Patent and Trademark Office or as being invalid by a court of competent jurisdiction, or upon the expiration of the last patent covering such Licensed Product, LICENSEE shall be entitled to a [*****] percent ([**]%) reduction in all royalties related to such Licensed Product accruing pursuant to this Article 4.6, commencing on the effective date of such determination, judgment or expiration.

5.REPORTS.PAYMENTS AND ACCOUNTING

5.1 Quarterly Royalty Payment and Report. LICENSEE shall make written reports and royalty payments to LICENSOR within ninety (90) days after the end of each calendar quarter following the First Commercial Sale. This report shall state the number, description, and aggregate Net Sales of Licensed Product(s) during such completed calendar quarter, and resulting calculation of earned royalty payment due LICENSOR for


Page 5

such completed calendar quarter. Concurrent with the making of each such report, LICENSEE shall include payment due LICENSOR of royalties for the calendar quarter covered by such report.

5.2 Annual Progress Reports. LICENSEE shall provide annual written progress reports within sixty (60) days after the anniversary date of the effective date of this agreement. The reports shall include sufficient detail to allow LICENSEE to determine progress on research and development, manufacturing, sublicensing, marketing and sales during the previous twelve (12) months as well as plans for the coming year.

5.3 Accounting. LICENSEE agrees to keep records for a period of two (2) years showing the manufacturing, sales, use, and other disposition of products sold or otherwise disposed of under the license herein granted in sufficient detail to enable the royalties payable hereunder by LICENSEE to be determined, and further agrees to permit its books and records to be examined from time to time by a certified public accountant of a nationally recognized accounting firm, who is selected and paid for by LICENSOR, but no more than once per calendar year, to the extent necessary to verify reports provided for in Paragraph 5.1. Such examination is to be made by LICENSOR, at its expense and all such information obtained shall be treated as confidential information pursuant to Article 10. If LICENSOR determines that LICENSEE has, for any reason, failed to pay adequate royalties, LICENSEE shall immediately upon notice thereof pay to LICENSOR any owed royalties plus interest at the rate of eleven percent (11%) per annum, compounded daily, calculated from the date upon which such royalties should have been paid to the date of actual payment of LICENSOR.

6. WARRANTY

LICENSOR represents and warrants that it has the right to grant LICENSEE the license granted herein and that it has not granted the Patent Rights or any rights in any Licensed Product(s) to any third party, except for United States government rights which may have been required by law. LICENSOR also represents and warrants that, to the best of LICENSOR's knowledge, information and belief, the Invention(s) are novel.

7. INFRINGEMENT

7.1 LICENSOR and LICENSEE shall promptly give notice to the other in writing of any alleged infringement of Patent Rights. The parties shall thereupon confer as to what steps are to be taken to stop or prevent such infringement.

7.2 LICENSEE shall have the first right to defend Patent Rights against any infringer at LICENSEE's cost and expense including by bringing any legal action for infringement or defending any counterclaim of invalidity or action of a third party for declaratory judgment of non-infringement, which LICENSEE, in its sole discretion,


Page 6

decides is reasonable and necessary for it to undertake. LICENSEE shall bring or defend or may settle any such actions solely at its own expense and through counsel of its selection and will be entitled to retain any settlement or damage award received except as provided for in Article 7.5; provided, however, that LICENSOR shall be entitled in each instance to participate through counsel of its own selection and its own expense. LICENSEE and LICENSOR acknowledge and agree that, although LICENSOR shall have the right at LICENSOR's option to prosecute infringers as provided in the following Article 7.3, LICENSOR is not desirous of being a party to any such infringement suit. LICENSEE shall not join LICENSOR as a party-plaintiff in any suit which LICENSEE may institute unless necessary for the maintenance of said suit, and then only with the prior knowledge and written consent of LICENSOR. In such event, LICENSOR shall not be chargeable for any costs or expenses. LICENSOR shall execute all documents necessary for the prosecution of any infringement suit brought by LICENSEE and provide other such support as LICENSEE may require including having its employees testify when requested and make available relevant records, papers, information, samples, specimens and the like, all however at the expense, with respect to travel and the like, of LICENSEE.

7.3 LICENSOR shall have the right to defend the Patent Rights against infringement in the event that LICENSEE declines to exercise its rights to defend Patent Rights under Article 7.2 and shall have sole discretion to file and prosecute, defend or settle such infringement and declaratory judgment action at its own expense through counsel of its own selection and will be entitled to retain any settlement or damage award received; provided, however, that LICENSEE shall be entitled in each instance to participate through counsel of its own selection and at its own expense. LICENSEE shall have no responsibility or financial obligation with respect to any such infringement action except to provide reasonable assistance to LICENSOR as requested and LICENSOR shall reimburse LICENSEE for LICENSEE's out-of-pocket expenses in connection with any such assistance. LICENSEE shall execute all documents necessary for the prosecution of any infringement suit brought by LICENSOR and provide other such support as LICENSOR may require, including having its employees testify when requested and make available relevant records, papers, information, samples, specimens and the like, all however at the expense, with respect to travel and the like, of LICENSOR.

7.4 In the event that LICENSOR decides to institute suit, LICENSOR shall be entitled to retain the entire amount of any recovery or settlement. Furthermore, at its option, LICENSOR may join LICENSEE as plaintiff.


Page 7

7.5 LICENSOR shall be entitled to the percentage of any recovery obtained in any infringement suit brought by LICENSEE equal to the amount to which LICENSOR would be entitled under the sublicensee royalty provision of this Agreement had said recovery been paid to LICENSEE as sublicense royalties by the defendant in said infringement suit. LICENSEE may deduct its reasonable costs and attorneys' fees incurred in prosecuting such suit, to the extent such costs and fees are not otherwise recovered, prior to calculating the share owing to LICENSOR pursuant to this provision.

7.6 Should either LICENSOR or LICENSEE commence a suit under the provisions of Paragraphs 7.2 or 7.3 and thereafter elect to abandon the same, it shall give timely notice to the other party which may, if it so desires, continue prosecution of such suit; provided, however, that the sharing of expenses and any recovery in such suit shall be agreed upon between LICENSOR and LICENSEE.

7.7 LICENSEE during the period of this Agreement, shall have the sole right in accordance with the terms and conditions herein to sublicense any alleged infringer, and LICENSOR shall be entitled to royalties therefrom as specified in Article 4.6.

8. PROSECUTION OF LICENSED PATENTS

8.1 LICENSEE agrees to accept liaison and financial responsibilities, as hereinafter set forth, for the prosecution, by a patent lawyer in independent practice, who shall be nominated by LICENSEE and approved by LICENSOR, of the Licensed Applications. Said financial responsibilities shall not only include the costs of prosecution but also the payment of maintenance fees, where required, to maintain said patent applications and patents, if issued, in force and effect for as long as possible. It is further agreed that the patent lawyer selected by LICENSEE and approved by LICENSOR shall be required, if so desired by LICENSOR, to keep a patent lawyer selected by LICENSOR informed of all steps in the prosecution and maintenance of said Patent Rights. Written approval will be required from LICENSOR to the patent lawyer selected by LICENSEE for actions concerning this patent.

8.2 Within two (2) weeks of notification to LICENSOR by LICENSEE of the identity of the patent lawyer, LICENSOR will request that its counsel furnish to the patent lawyer nominated in accordance with Paragraph 8.1 above:

(a) Complete file histories of all of the patent applications constituting said Licensed Applications; and

(b) An executed power of attorney or powers of attorney appointing such patent lawyer as attorney of record in connection with all of said Licensed Applications.


Page 8

8.3 LICENSOR shall have the right at any time, by notice in writing and sent to LICENSEE by registered mail, to assume and continue at its own expense, direction of the prosecution of any of said Licensed Applications. Upon receipt by LICENSEE of any such notice from LICENSOR, LICENSEE and the patent lawyer nominated in accordance herewith shall provide in two weeks from the time of notice an executed power of attorney and all the file histories of the patent applications constituting said Licensed Applications. Upon receipt of this documentation, LICENSEE and the patent attorney nominated by LICENSEE shall be relieved of all future responsibilities to prosecute the Licensed Applications to which the notice is directed. In which event, LICENSOR agrees to use its good faith efforts to apply for, seek prompt issuance of, and maintain during the term of this Agreement, Patent Rights to the extent necessary to cover both broadly and specifically Licensed Products. LICENSEE shall have reasonable opportunity to advise LICENSOR and shall cooperate with LICENSOR in such filing, prosecution and maintenance. LICENSOR shall use its good faith efforts to furnish LICENSEE with copies of any patent application sufficiently in advance of its anticipated filing date to give LICENSEE a reasonable opportunity to review and comment thereon.

LICENSOR also agrees to furnish LICENSEE with copies of all substantive communications to and from U. S. and foreign patent offices regarding Licensed Applications and in good faith shall consider the reasonable comments of LICENSEE regarding all communications and filings to and from the respective patent office. If, for any reason, prosecution or maintenance of a particular patent application or patent in a particular country is to be abandoned by LICENSEE, LICENSOR will be notified in sufficient time to assume prosecution. LICENSEE shall bear all cost to maintain the patent prosecution until such time that LICENSOR can assume patent prosecution.

9. TERM AND TERMINATION

9.1 The Term of this Agreement shall be for a period beginning with the Effective Date and extending until the later often (10) years after the First Commercial Sale or the last to expire valid claim of Patent Rights covering a Licensed Product, unless sooner terminated as herein provided. Thereafter, LICENSEE'S license granted in 3.1 shall be a fully paid up, non-exclusive license. Surviving any termination are: (a) LICENSEE's obligation to pay royalties accrued or accruable; and (b) Any cause of action or claim of LICENSEE or LICENSOR, accrued or to accrue, because of any breach or default by the other party.

9.2 Upon any material breach or default under this Agreement by LICENSEE, LICENSOR may give written notice thereof to LICENSEE, and LICENSEE, shall have thirty (30) days thereafter to cure such breach or default. If such breach or default is not so cured, LICENSOR, may then in its sole discretion and option
(a) terminate this Agreement and the licenses granted herein or (b) seek such other relief as may be provided by law in such circumstances by giving written notice thereof to LICENSEE.


Page 9

9.3 LICENSEE shall have the right to terminate this Agreement at any time upon ninety (90) days written notice to LICENSOR and payment of all amounts due LICENSOR through the effective date of termination.

9.4 Upon termination of this Agreement under any provision, all further obligations of the parties under this Agreement shall terminate without further liability of any party to another; provided, however, that the publicity and confidentiality obligations of the parties contained in Section 10 hereof, shall survive any such termination for the periods set forth therein. Termination shall not relieve any party of any obligation occurring prior to such termination, of any liability for a breach of, or for any misrepresentation under this Agreement or be deemed to constitute a waiver of any available remedy (including specific performance if available) for any such breach or misrepresentation, provided, however, that neither party shall be liable for consequential, punitive or special damages including without limitation, lost profits. LICENSEE and any sublicensee thereof may, however, after the effective date of such termination, sell all Licensed Products, and complete Licensed Products in the process of manufacture and fulfill all orders for Licensed Products at the time of such termination and sell the same, provided that LICENSEE shall pay to LICENSOR the royalties thereon as required by Article 4 of this Agreement and shall submit the reports required by Article 5 hereof on the sales of such Licensed Products.

9.5 In the event of termination of this Agreement for any reason, any and all rights granted LICENSEE hereunder, including any rights granted by LICENSEE to any sublicensee, shall cease and terminate, and all such rights shall revert to LICENSOR. LICENSEE shall diligently thereafter return to LICENSOR, or to LICENSOR's designated attorneys, any files or other documents in its possession or in the possession of its attorneys, agents or sublicensees, relating to pending or issued Licensed Patent(s), except that one copy of each such document may be retained by LICENSEE's attorney for the purpose of ensuring compliance hereunder. LICENSEE and shall also execute any and all documents necessary to return control of said Licensed Patent(s) until such time as control has properly been transferred to LICENSOR. Further, LICENSEE shall immediately return to LICENSOR all research data, biological and other material (including but not limited to licensed cell lines), prototypes, process information, clinical data and the like of LICENSOR in its possession or in the possession of its sublicensees.

10. PUBLICITY AND CONFIDENTIALITY

10.1 Neither party shall use the name of the other in any form of advertising or promotion without the prior written approval of the other. The parties may, however, acknowledge Sponsor's support for, and subject to the obligations of confidentiality set forth in 10.3, the nature of the investigations being pursued under this Agreement. In any such statement, the relationship of the parties shall be accurately and appropriately described.


Page 10

10.2 Confidential Items. Confidential Items shall mean any proprietary information or materials belonging to the disclosing party clearly marked CONFIDENTIAL (whether or not patentable) including, but not limited to, formulations, techniques, methodology, equipment, data, reports, know-how, sources of supply, patent positioning, consultants and business plans, including any negative developments, which are communicated to, learned by, or otherwise acquired by the party receiving such information or materials during or in the course of this Agreement, further including information concerning the existence, scope or activities of any research and development project of the disclosing party.

10.3 Each party shall hold in confidence for a period of three (3) years, and shall not disclose to any person outside its respective organization, any Confidential Items disclosed to it by the other party to this Agreement. The party receiving such Confidential Items shall use such Confidential Items only for the limited purpose for which it was disclosed and shall not exploit such Confidential Items for its own benefit or the benefit of another without the prior written consent of the disclosing party. Each party shall disclose Confidential Items of the other party under this Agreement only to persons within its organization and to consultants who have a need to know such Confidential Items in the course of the performance of their duties and who are bound to protect the confidentiality of such Confidential Items.

10.4 The confidentiality and non-use obligations of the receiving party shall not apply to any Confidential Item(s) which is received by one party from the other party and which:

(i) is disclosed in a printed publication available to the public, is described in an issued patent anywhere in the world, is otherwise in the public domain at the time of disclosure, or becomes publicly known through no breach of this Agreement by the receiving party;

(ii) becomes known to the receiving party through disclosure by sources other than the disclosing party having the right to disclose such Confidential Items;

(iii) is disclosed pursuant to the requirements of a governmental agency or any law requiring disclosure thereof, provided that the disclosing party is provided with prior written notice of any such disclosure;

(iv) is generally disclosed to third parties by the disclosing party without similar restrictions on such third parties;

(v) is approved for release by written authorization of an officer of the disclosing party; or

(vi) is already known by the receiving party as evidenced by its prior written records;


Page 11

provided, however, that a breach of the foregoing obligations shall not be absolved by the subsequent occurrence of any of the above exceptions.

11. PUBLICATION

Subject to all other terms of this Agreement, including those concerning confidentiality, LICENSOR's investigators have the right to publish or otherwise publicly disclose information. However, LICENSOR will provide LICENSEE with copies of articles reporting on research involving the TECHNOLOGY prior to their submission for publication in order to provide LICENSOR an opportunity to determine if patentable inventions or Confidential Items are disclosed. LICENSEE shall inform LICENSOR and LICENSOR'S author(s) within thirty (30) days after receipt of the material whether in its judgment the material contains information on which patent applications may or should be filed and the identification of any LICENSEE Confidential Items to be removed therefrom. Submission then may be delayed up to an additional sixty (60) days to allow filing of appropriate patent applications.

12. ASSIGNMENT

This Agreement shall not be assignable by either party without the prior written consent of the other party, except that LICENSEE may assign this Agreement to an entity, which acquires all or substantially all of the assets to which this Agreement pertains without the prior written consent of LICENSOR.

13. INDEMNIFICATION

13.1 LICENSEE agrees that during the term of this Agreement and thereafter, it will indemnify, defend and hold LICENSOR, its trustees, officers, employees and affiliates, harmless against all claims and expenses, including legal expenses and attorneys' fees, arising out of the death of or injury to any person or persons, or out of any damage to property, and against any other claim, proceeding, demand, expense and liability of any kind whatsoever resulting from the production, manufacture, sales, use, consumption or advertisement of Licensed Products by LICENSEE.

14. NOTICES

All notices under this Agreement shall be deemed to have been fully given when done in writing and deposited in the United States mail, registered or certified, and addressed as follows:


Page 12

TO LICENSOR:

William J. Hartman
Director of Research and Technology Development Services
Georgetown University Medical Center
Suite 177, Bldg. D.
4000 Reservoir Road, N.W.
Washington, D.C. 20007

TO LICENSEE:

ZEBRA PHARMACEUTICALS
Attn: John Babich
160 Second St.
Cambridge, MA 02142

Either party may change its address upon notice to the other party as provided herein.

15. DISPUTE RESOLUTION

Should the parties hereafter have any dispute as to their obligations pursuant to this Agreement, they shall first attempt to resolve such dispute among themselves. If such efforts are not successful, the exclusive method for resolving such a dispute shall be arbitration as described herein.

Either party may elect to submit the issue to arbitration by giving written notice to the other party and naming an arbitrator. The other party will then have thirty (30) days to select its own arbitrator. Once both arbitrators have been selected they shall meet within thirty (30) days of the appointment of the second arbitrator and select a third arbitrator mutually agreeable to them.

Once the panel of arbitrators have been chosen, they shall conduct an arbitration on the disputed issue or issues in accordance with the Commercial Arbitration Rules of the American Arbitration Association. The third arbitrator shall serve as the presiding arbitrator, although, in the event of dispute among the arbitrators, the majority decision of the arbitration panel shall be binding. The decision of the arbitrators shall be final and either party may apply to a court located in the District of Columbia to enter judgment based on the arbitrator's decision. All costs of the arbitrators and arbitration, other than the respective parties' attorneys' fees and costs, shall be borne equally by the parties.


Page 13

16. WAIVER

None of the terms, covenants and conditions of this Agreement can be waived except by the written consent of the party waiving compliance.

17. APPLICABLE LAW

This Agreement shall be construed, interpreted and applied in accordance with the laws of the District of Columbia and applicable federal laws.

18. ENTIRE AGREEMENT

This writing constitutes the entire agreement of the parties and there are no promises, understandings or agreements of any kind pertaining to this Agreement other than those written in this Agreement.

IN WITNESS WHEREOF, the parties thereto have executed this Agreement in duplicate originals by their duly authorized officers or representatives.

For LICENSOR                                   For LICENSEE:

By: /s/ Robert J. Halonen                      /s/ John W. Babich
    ---------------------------                ----------------------------
    Robert J. Halonen, Ph.D.                   John W. Babich
    Chief Financial Officer                    President and CEO

         2-23-00                                       3/3/00
    ---------------------------                ----------------------------
    Date                                       Date

    /s/ William J. Hartman
    ----------------------------
    William J. Hartman, Director
    Research & Technology Development Services

            2/23/00
    --------------------------
    Date


AMENDMENT TO EXCLUSIVE LICENSE AGREEMENT

Dated March 1, 2000

Between BioStream Inc. (formerly designated Zebra Pharmaceuticals in the above-referenced Agreement) and Georgetown University

This amendment serves to modify the original agreement entered into March 1, 2000, for Patent Rights and Technology related to US Patent Application Serial Nos. 60/131,627 filed April 28, 1999, and 60/166,195 filed November 22, 1999, both entitled "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALADase", foreign applications corresponding thereto, and any divisions, continuations, or reexaminations thereof, and will be enforceable on the date of the last signature of this Amendment.

BIOSTREAM and GEORGETOWN UNIVERSITY agree that the following provisions of the above-referenced agreement shall be modified as follows:

2. DEFINITIONS

SECTION 2.5

Section 2.5 formerly;

2.5 "Licensed Field of Use" means any diagnostic or therapeutic use concerning "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALADase".

Shall be replaced by:

2.5 "Licensed Field of Use" means use of "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALADase" under "Patent Rights" for imaging applications only. Use of said compounds for development or sale of therapeutic compounds is specifically precluded.

8. PROSECUTION OF LICENSED PATENTS

SECTION 8.4 SHALL BE ADDED;


8.4 In the event that LICENSOR exclusively licenses "Patent Rights" for fields of use other than specified in Section 2.5, LICENSOR shall compensate LICENSEE, from licensing revenue received from said license, for 50% of patent costs incurred by LICENSOR according to section 4.1. LICENSOR and LICENSEE shall each pay 50% of any and all patent costs incurred after the effective date of any such exclusive license.

In witness thereof, the parties have executed the Amendment on the dates indicated.

BIOSTREAM                              GEORGETOWN UNIVERSITY

By: /s/ John W. Babich                 By: /s/ Martin A. Mullins
   ____________________________            ______________________________

Name: John W. Babich                   Name: Martin Mullins
     __________________________             _____________________________

Title: President                       Title: Vice President
      _________________________               Office of Technology Transfer
                                              _____________________________

Date: 02/14/03                         Date: 1/27/2003
     __________________________             _____________________________


SECOND AMENDMENT TO EXCLUSIVE LICENSE AGREEMENT

Dated October 27, 2005

Between Molecular Insight Pharmaceuticals, Inc. (formerly designated in the above referenced Agreement as BioStream Inc., and prior to that, Zebra Pharmaceuticals) and Georgetown University.

This Second Amendment serves to modify the Agreement entered into March 1, 2000 and Amended February 14, 2003, for Patent Rights and Technology related to US Patent Application Serial Nos. 60/131,627 (filed April 28, 1999) and 60/166,195 (filed November 22, 1999), both entitled "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALDase", as well as any foreign applications corresponding thereto, and any divisions, continuations, or any reexaminations thereof, and will be enforceable on the date of the last signature of this Second Amendment.

Molecular Insight Pharmaceuticals, Inc. and Georgetown University agree that the following provisions in the above referenced agreement shall be modified as follows:

PREAMBLE

The Agreement preamble formerly reciting:

Effective as of 1 March, 2000, GEORGETOWN UNIVERSITY, a not-for-profit corporation of the District of Columbia, having a principal address at 37th & O Streets, N.W., Washington, D.C. 20057 ("LICENSOR") and ZEBRA PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 160 Second St. Cambridge, Massachusetts 02142 ("LICENSEE"), agree as follows:

Shall be replaced by:

Effective as of 1 March, 2000, GEORGETOWN UNIVERSITY, a not-for-profit corporation of the District of Columbia, having a principal address at 37th & O Streets, N.W., Washington, D.C. 20057 ("LICENSOR") and MOLECULAR INSIGHT PHARMACEUTICALS, a Massachusetts corporation, having a principal place of business at 160 Second St., Cambridge, Massachusetts 02142 ("LICENSEE"), agree as follows:

2. DEFINITIONS

Section 2.1 formerly reciting:

2.1 "Patent Rights" refers to LICENSOR's rights arising from U.S. Provisional Patent Applications Serial No. 60/166,195, filed November 22, 1999 "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALDase", and Serial No. 60/131,627 filed April 28, 1999, entitled "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALDase", and naming as inventors Alan P. Kozikowski, Jarda T Wroblewski and Fajun Nan, including any


foreign patent applications corresponding thereto, any United States divisions, continuations, reissues, or reexaminations thereof, and any United States or foreign patent(s) issued or granted therefrom and any United States or foreign patents or patent applications claiming Technology. Such patent application(s) are the "Licensed Application(s)" and any resulting patents are the "Licensed Patents(s)."

Shall be replaced by:

2.1 "Patent Rights" refers to LICENSOR's rights arising from U.S. Provisional Patent Applications Serial No. 60/166,195, filed November 22, 1999 "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALADase", and Serial No. 60/131,627 filed April 28, 1999, entitled "Ligands for Metabotropic Glutamate Receptors and Inhibitors of NAALADase", originally converted as U.S.S.N. 09/559,978, and which are now U.S.S.N., 10/374,765 and U.S. Patent 6,528,499, and further including any foreign patent applications corresponding thereto, any United States divisions, continuations, continuations in-part to the extent the claims are directed to subject matter specifically described in USSN 09/559,978, reissues, or reexaminations thereof and any United States or foreign patent(s) issued or granted therefrom and any United States or foreign patents or patent applications corresponding thereto all to the extent owned or controlled by Georgetown. Such patent application(s) are the "Licensed Application(s)" and any resulting patents are the "Licensed Patents(s)."

In witness thereof, the parties have executed this Second Amendment on the dates indicated.

MOLECULAR INSIGHT                      GEORGETOWN UNIVERSITY
PHARMACEUTICALS, INC.


By:                                    By: /s/ Martin Mullins
   ____________________________            ______________________________

Name: John W. Babich                   Name: Martin Mullins

Title: President and CSO               Title: Vice President
                                              Office of Technology Transfer

Date:                                  Date: 10/28/05
   ____________________________            ______________________________

2

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.16

LICENSE AGREEMENT

THIS AGREEMENT made December 15, 2000.

BETWEEN:

THE BOARD OF GOVERNORS OF
THE UNIVERSITY OF WESTERN ONTARIO,
(the "University")

AND:

BIOSTREAM, INC.

a corporation incorporated under the laws of the State of Massachusetts, and having a place of business at 160 Second Street, Cambridge, MA,


(the "Licensee")

WHEREAS:

A. The University has been engaged in research in the course of which it has invented or developed a certain technology due to the efforts of the Inventors in the Department of Chemistry of the University;

B. The Licensee wishes to obtain from the University and the University has agreed to grant a license to the Licensee to use or cause to be used such technology to manufacture, market, sell, distribute, lease and/or license or sublicense products derived or developed from such technology;

NOW THEREFORE in consideration of the premises and of the mutual covenants set forth in this Agreement, the parties hereto agree as follows:

SECTION 1 - DEFINITIONS

1.01 In this Agreement, unless a contrary intention appears:

(a) "Affiliate" means any corporation, company, partnership, joint venture or other entity which controls, is controlled by, or is under common control with, a party to this Agreement; for purposes of this Section 1.01(a), control shall mean, in the case of corporate entities, the direct or indirect ownership of voting shares carrying more than 50% of the votes for the election of directors and sufficient votes to elect a majority of the board of directors;

(b) "Business Day" means every day other than Saturday, Sunday, and statutory holidays in the State of Massachusetts;

(c) "Confidential Information" means the Technology and the information provided to the University pursuant to Section 8.01;


(d) "Date of Commencement" or "Commencement Date" means the date on which this Agreement shall come into force, which shall be the fifteenth day of December, 2000;

(e) "Field of Use" means all uses of the Technology;

(f) "Net Revenue" means the total of all amounts invoiced by Licensee and its authorized Affiliates and sublicensees and agents for sales of Products, which for the purposes of royalty payments shall be limited to those sold in such portions of the Territory to which Patent Rights apply, net of all separately invoiced and actually incurred charges relating to such sales, for: (a) credits, allowances, discounts and rebates to, and chargebacks from the account of, purchasers in respect of Products; (b) actual freight and insurance costs incurred in transporting Products to such purchasers; (c) reasonable and customary cash, quantity and trade discounts and other price reduction programs in respect of Products;
(d) sales, use value-added and other direct taxes incurred in respect of Products; and (e) customs duties, surcharges and other governmental charges incurred in connection with the exportation or importation of Products. Product shall be deemed to have been sold and included in Net Revenue the earlier of delivery or payment. Where any Net Revenue is derived from a country other than Canada, it shall be converted to the equivalent in Canadian dollars on the date received by the Licensee or any such Affiliate at the rate of exchange set by the Bank of Montreal in Toronto for such date, of converting the currency of such revenue into Canadian dollars. The amount of Canadian dollars resulting from such conversion shall be included in the Net Revenue;

(g) "Licensee Improvement" means any addition to or modification of a component or a material useful in the Technology or the Patent Rights made by the Licensee or by any authorized Affiliate, sublicensee, or agent,

(h) "Licensee Processed Material" means any substance, product, or compound that is processed by the Licensee or by any of its authorized Affiliates, sublicensees, or agents and which utilizes the Technology,

(i) "Milestone Payments" has the meaning set forth in Section 5.02,

(j) "Materials" means any substance, product or compound (including all cell lines, vectors, plasmids, clones, micro organisms, anti-bodies, antigens, test plates, reagents, chemicals, compounds, physical samples, models and specimens) delivered by the University to the Licensee or to any authorized Affiliate, sublicensee, or agent,

(k) "Patent Rights" means pending US National Phase patent application No. 09/529,017, "Preparation of Radiolabelled Haloaromatics Via Polymer-Bound


Intermediates", the inventions described and claimed therein, and any divisions, continuations, continuations-in-part to the extent that their claims are dominated by existing Patents, and patents issuing thereon or reissues thereof; and any and all foreign patents and patent applications corresponding thereto.

(l) "Product(s)" means any goods, products or Licensee Processed Material covered by one or more claims of the University Patent Rights or University Improvement or of any Licensee Improvement, manufactured with or utilizing any Technology,

(m) "Related Person(s)" has the meaning assigned to it in section 251 of the Income Tax Act of Canada,

(n) "Royalty Due Dates" means the last Business Day of January, April, July, and October of each and every year during which this Agreement remains in full force and effect,

(o) "Technology" means the Patent Rights and any and all Materials, knowledge, know-how and/or techniques invented, developed and/or acquired, prior to or after the Date of Commencement, by the University or the Licensee, relating to Patent Rights and is useful or necessary to the development or production of Products,

(p) "Territory" means worldwide,

(q) "University Improvement" means any addition to or modification of a component or a material useful in the Technology or the Patent Rights made by the University,

(r) "University Trade-marks" means any mark, trade-mark, service mark, logo, insignia, seal, design or other symbol or device used by the University and associated with or referring to the University or any of its facilities.

SECTION 2 - PROPERTY RIGHTS IN AND TO THE TECHNOLOGY

2.01  OWNERSHIP. The parties acknowledge and agree that the University shall
      retain ownership of the Patent Rights and Materials and shall own all
      University Improvements made both before and after the Commencement Date.
      Licensee shall own all Licensee Improvements.

2.02  FURTHER ASSURANCES. The Licensee shall, at the request of the University,
      enter into such further agreements and execute any and all documents as
      may be required to confirm that ownership of the Technology resides with
      the University.

2.03  LICENSEE TO REPORT LICENSEE IMPROVEMENTS. From time to time and in any
      event no more than once every six months, the Licensee shall, at the
      request of the


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

University, deliver in writing the details of any and all Licensee Improvements, modifications and enhancements made by it relating to the Technology.

SECTION 3 - GRANT OF RIGHTS

3.01  LICENSE. Subject to the terms and conditions hereof, the University hereby
      grants to the Licensee and its authorized Affiliates a perpetual,
      royalty-bearing exclusive license to manufacture, use, market, sell and
      distribute Products within the Field of Use in the Territory and to
      commercially exploit the Technology within the Field of Use in the
      Territory. Notwithstanding any other provision hereof, the parties
      acknowledge and agree that the University shall have the right to use the
      Technology and Licensee Improvements without charge whatsoever for
      research, scholarly publication, teaching and other non-commercial uses.

3.02  SUBLICENSING. The Licensee may grant sublicenses of the Technology,
      subject to the terms and conditions of Section 3.03.

3.03  SUBLICENSES. Licensee shall provide a true and complete copy of any
      sublicense agreement or any amendment or termination thereof within thirty
      (30) days of entering into any such sublicense agreement, or any amendment
      or termination thereof. All sublicense agreements executed by Licensee
      pursuant to this Section 3.03 shall be consistent with the terms of this
      Agreement including but not limited to Diligence, Milestones, Reports,
      Insurance, Termination and Indemnity. Licensee agrees to forward to
      Licensor on an annual basis a copy of any report received by Licensee from
      its sublicensee(s) which is pertinent to an accounting for the payment of
      Milestone Payments (as defined in Section 5.02), royalties or other
      sublicense income under such sublicense agreements. Licensee is
      responsible for the performance of the sublicensee(s) relevant to this
      Agreement. In no event will a Licensee sublicensee be permitted to further
      sublicense or to assign or transfer any rights which have been granted to
      it by Licensee. Upon termination of this Agreement, any and all existing
      sublicenses granted by Licensee shall be assigned to the University.

SECTION 4 - TERM

4.01  TERM. This Agreement shall terminate on the expiration of the last patent
      obtained pursuant to Section 7 herein, unless earlier terminated pursuant
      to Section 13 herein.

SECTION 5 - INITIAL LICENSE FEE, MILESTONE PAYMENTS AND ROYALTIES

5.01  INITIAL LICENSE FEE. The Licensee agrees to pay to the University, as an
      initial license fee, the sum of $[******] (Canadian funds). The said sum
      shall be paid concurrently with the execution of this Agreement. The said
      sum shall not be refundable to the Licensee under any circumstances, in
      whole or in part.


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

5.02  MILESTONE PAYMENTS. Licensee shall pay the University milestone product
      development payments with respect to the development of Product as set
      forth in the table below, each payment becoming due and payable on the
      first date of completion of such milestone regardless of the country in
      which such milestone is completed. Regardless of the number of Products
      successfully completing a milestone, payment will be made only upon the
      first such successful completion by any Product.

Milestone                                    Payment
--------------------------------------       ----------------
Initiation of Phase I Clinical Trail         Canadian $[******]
Completion of Phase II Clinical Trial        Canadian $[******]
Completion of Phase III Clinical Trial       Canadian $[******]
Grant of Regulatory Approval                 Canadian $[******]

5.03  ROYALTIES.

      In consideration of the license granted hereunder, the Licensee shall pay
      to the University:

      (a)   a royalty of [**************] percent ([***]%) of Net Revenue. For
            greater clarification, on sales between the Licensee, and/or its
            Affiliates, sublicensees or agents for resale purposes, the royalty
            shall be paid only on the resale value; and

      (b)   In the case of sublicenses or other arrangements with third parties
            with whom the Licensee is undertaking any efforts to further develop
            or commercialize the Technology and/or Product(s) jointly or in
            association with such third party, the Licensee shall also pay to
            University [****] percent ([*]%) of any income or other
            consideration received (e.g. license issue fees, milestone payments,
            etc. but excluding reimbursement by sublicensee or the third party
            of Licensee's out-of-pocket expenses for research and development).
            The non-royalty payment provided for in this Section 5.03(b) will
            not apply to the first Product to which the Milestone Payments under
            Section 5.02 are applicable; and

      (c)   In the case of any other sublicenses to third parties, Licensee
            shall also pay to University a percentage of any income or other
            consideration received (e.g. license issue fees, milestone payments,
            etc.) according to the following sliding scale:

                  (i) if sublicensed within one year after commencement of this
                  Agreement, [*****] percent ([**]%),

                  (ii) if sublicensed within year two or three after
                  commencement of this Agreement, [******] percent ([**]%),

                  (iii) if sublicensed within year four or five after
                  commencement of this Agreement, [***] percent ([**]%),

                  (iv) if sublicensed within year six after commencement of this
                  Agreement or any time thereafter, [*****] percent ([*]%).

5.04  ROYALTY PAYMENT DATES. The royalty shall become due and payable on each
      Royalty Due Date and shall be calculated with respect to the Net Revenue
      of the


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

      Licensee in the three month period immediately preceding the month in
      which the applicable Royalty Due Date falls.

5.05  CURRENCY OF PAYMENTS. All payments made by the Licensee to the University
      hereunder shall be made in Canadian dollars without any reduction or
      deduction of any nature or kind whatsoever, except as may be prescribed by
      Canadian law.

5.06  MINIMAL ANNUAL ROYALTY. The Licensee shall pay a minimum annual royalty to
      the University of the sum of [************] dollars (Cdn$[******]) which
      is payable at the end of each calendar year in which Licensee does not
      sponsor research in the area of radiolabelling technology, at University
      at a level of at least [**************] dollars (Cdn$[******]) in that
      calendar year. There shall be no requirement for a minimum, annual royalty
      in the year 2000. Minimum annual royalties payable under this Section 5.06
      shall be credited against the annual running royalty payable under Section
      5.03.

SECTION 6 - ASSIGNMENT

6.01  ASSIGNMENT BY THE LICENSEE. Except as provided for in Section 7 herein,
      the Licensee will not assign, transfer, mortgage, charge or otherwise
      dispose of any or all of the rights, duties or obligations granted to it
      under this Agreement without the prior written consent of the University.
      The University is prepared to allow an assignment of the License Agreement
      with prior written notification to the University. If this License
      Agreement is assigned independently of a sale of the Licensee, as a going
      concern, other than as an assignment to an Affiliate, then the University
      is entitled to the same percentage of proceeds or, consideration as per
      the sliding scale pursuant to Section 5.03. The assignee or the Affiliate
      as the case may be shall be responsible for performance of the terms of
      this License Agreement as though the original signatory thereto.

6.02  ASSIGNMENT BY THE UNIVERSITY. The University shall have the right to
      assign its rights, duties and obligations under this Agreement to a
      corporation or society of which it is the sole shareholder, in the case of
      a corporation with share capital, or of which it controls the membership,
      in the case of a corporation or society without share capital. In the
      event of such an assignment, the Licensee will release, remise and forever
      discharge the University from any and all obligations or covenants,
      provided however that such corporation executes a written agreement which
      provides that such corporation shall assume all such obligations or
      covenants from the University and that the Licensee shall retain all
      rights granted to the Licensee pursuant to this Agreement.

SECTION 7 - PATENTS

7.01  PATENT RIGHTS. Licensee hereby recognizes and acknowledges the validity of
      the Patent Rights licensed hereunder and agrees not to contest such
      validity either directly or indirectly by assisting other parties.

7.02  PATENT PROSECUTION: PATENT COSTS. Licensee shall reimburse the University
      for invoiced patent costs incurred related to Patent Rights, in the total
      amount of Cdn$12,111 within thirty (30) days of receiving copies of
      invoices for such patent costs. From and after the date of this Agreement,
      the Licensee shall have primary responsibility for the filing, prosecution
      and maintenance of patents and/or patent applications worldwide for those
      inventions within the Patent Rights, at the Licensee's expense. The
      Licensee shall consult with the University as to the prosecution and
      maintenance of all such patent applications within the Patent Rights
      reasonably prior to any substantive deadline or action, and shall not
      substantially limit the scope of patent protection without the
      University's consent. The Licensee shall furnish the University with
      copies of all relevant documents upon filing the same with the patent
      office of any country.

7.03  COPIES OF PATENT RELATED MATERIALS. The University shall provide the
      Licensee with copies of the patent applications and the entire prosecution
      history thereof relating to the Patent Rights.

SECTION 8 - CONFIDENTIALITY AND PUBLICATION

8.01  DUTY OF CONFIDENTIALITY. The parties hereto acknowledge and agree that
      they will treat the Confidential Information as confidential and that they
      will use all reasonable efforts not to disclose or communicate or cause to
      be disclosed or communicated the Confidential Information to any person or
      corporation except as permitted under a sublicense. Such reasonable
      efforts will be no less than the efforts used by the receiving party to
      protect its own confidential information.

8.02  LICENSEE INTERNAL PROGRAM. Each of the parties covenants and agrees that
      it will initiate and maintain an appropriate internal program limiting the
      internal distribution of the Confidential Information to its officers,
      servants or agents and requiring appropriate non-disclosure agreements
      from any and all persons who may have access to the Confidential
      Information.

8.03  PUBLICATION. The University shall be permitted to present at symposia,
      national or regional professional meetings, and to publish in journals or
      other publications, accounts of its research relating to the Technology
      provided that the Licensee shall have been furnished copies of the
      disclosure proposed therefor at least 30 days in advance of the
      presentation or publication date. If the Licensee does not within 20 days
      after receipt of the proposed disclosure object to such presentation or
      publication on the grounds that it contains Confidential Information or
      confidential information with respect to Licensee Improvements or material
      that is patentable, the University may proceed with the presentation or
      publication. In the event that the Licensee objects to the presentation or
      publication on the grounds,

      (a)   that it contains Confidential Information or confidential
            information with respect to Licensee Improvements, the University
            shall co-operate in all reasonable

            respects in making revisions to any proposed disclosures to remove
            all Confidential Information or confidential information with
            respect to Licensee Improvements to the satisfaction of the
            Licensee; or

      (b)   that it contains material that is patentable, the Licensee may
            request that the intended disclosure be delayed for an additional
            period not exceeding 90 days to permit such patenting to occur.
            After such period has elapsed, the University shall be free to
            present and/or publish said disclosures.

SECTION 9 - ACCOUNTING RECORDS

9.01  ACCOUNTING RECORDS. The Licensee shall maintain at its principal place of
      business, separate accounts and records of business done pursuant to this
      Agreement, such accounts and records to be in sufficient detail to enable
      proper payments to be made under this Agreement, and the Licensee shall
      require Affiliates, sublicensees, and agents to keep similar accounts.

9.02  REPORTS. The Licensee shall deliver to the University by no later than 30
      days after the Royalty Due Date, together with the royalty payable
      thereunder, a report (the "Accounting") setting out particulars of the
      sale, distribution, leasing or sublicensing of the Technology and/or
      Products as shall be pertinent to the payment of royalties, including the
      following:

      (a)   the number of Products sold by Licensee and its authorized
            Affiliates or permitted sublicensees or agents in each country
            during the applicable royalty period:

      (b)   the Gross Revenue for each Product or Technology charged by Licensee
            and its Affiliates or permitted sublicensees or agents during the
            applicable royalty period;

      (c)   a calculation of Net Revenue in each country, including a listing of
            applicable deductions;

      (d)   total royalty payable on Net Revenue in Canadian dollars, together
            with the exchange rates used for conversion which shall be the rate
            of exchange established by the Bank of Montreal in Toronto on the
            date payment is received by the Licensee; and

      (e)   withholding taxes, if any, required to be deducted as a payment by
            the University with respect to such royalty payment.

      Licensee shall also provide to the University periodic reports of all
      significant stages and milestones in the development, manufacture and
      sale, distribute, leasing or sublicensing of the Technology and/or
      Products, including but not limited to, the milestones described in
      Section 5.02, by no later than thirty (30) days following the

      completion of such stage or milestone; such reports shall be in sufficient
      detail to enable the University to assess the status of all required
      regulatory approvals relating to the Products, and whether the Licensee is
      meeting its obligations under Section 10.01 hereof during the relationship
      between the parties.

9.03  GENERALLY ACCEPTED ACCOUNTING PRINCIPLES (GAAP). The calculation of
      royalties shall be made in accordance with generally accepted accounting
      principles from time to time approved by the American Institute of
      Certified Public Accountants (or any successor institute) applicable as at
      the date on which any calculation is required to be made, and applied on a
      consistent basis.

9.04  RETENTION OF ACCOUNTS AND RECORDS. The Licensee shall retain the accounts
      and records referred to in Section 9.01 for at least three (3) years after
      the date upon which they were made and shall permit any duly authorized
      representative of the University to inspect such accounts and records
      during normal business hours of the Licensee at the University's expense
      provided University gives Licensee at least two days notice of its intent
      to conduct such an inspection. The Licensee shall furnish such reasonable
      evidence as such representative will deem necessary to verify the
      Accounting and will permit such representative to make copies of or
      extracts form such accounts, records and agreements at the University's
      expense.

9.05  SURVIVAL OF THIS SECTION AFTER TERMINATION. Notwithstanding the
      termination of this Agreement, this Section 9 shall remain in full force
      and effect until:

      (c)   all payments, including but not limited to royalties, required to be
            made by the Licensee to the University under this Agreement have
            been made by the Licensee to the University, and

      (b)   any other claims of any nature or kind whatsoever of the University
            against the Licensee have been settled.

SECTION 10 - PRODUCTION AND MARKETING

10.01 DILIGENCE BY LICENSEE. The Licensee shall use commercially reasonable efforts to: (a) promote, market and sell the Products; (b) utilize the Technology; and (c) meet or cause to be met the world market demand for the Products within jurisdictions where Patent Rights exist. The Licensee shall also comply with the research and development timeline provided in Schedule "B".

10.02 RESTRICTION ON USE OF UNIVERSITY TRADE-MARKS, NAME. The Licensee shall not use any of the University Trade-marks or make reference to the University or its name in any advertising publicity whatsoever, without the prior written consent of the University. No prior written consent by the University is required when University is identified solely for the purposes of disclosures required by law or providing factual information so long as in either instance there is no implied endorsement of any


Product or use by the Licensee of the Patent Rights. Acknowledgements customary in scientific publications are expected.

10.03 EVALUATION. In the event that the University is of the view that the Licensee is in breach of the covenant contained in this Section 10, the University shall notify the Licensee and the parties hereto shall appoint an independent evaluator (the "Evaluator"), mutually acceptable to both parties, to review the efforts made by the Licensee with respect to the promotion, marketing, sale and distribution of the Products and the Technology (the "Evaluation").

10.04 EVALUATION (CONTINUED). In the event that the parties cannot agree on the Evaluator, the Evaluator shall be chosen by arbitration in accordance with
Section 16.03. Evaluations shall be limited to one per calendar year.

10.05 EFFECT OF EVALUATION. If the Evaluator determines that the Licensee is in breach of the covenant contained in this Section 10, then the University shall have the right to terminate this Agreement as provided in Section 13 herein. If the Evaluator determines that the Licensee is not in breach of the covenant contained in this Section 10, then the University shall not terminate this Agreement for breach of this Section.

10.06 COST OF EVALUATION. The cost of an evaluation hereunder shall be borne 50% by the Licensee and 50% by the University.

SECTION 11 - INSURANCE

11.01 INSURANCE REQUIRED FOR LICENSEE. One month prior to the first sale of a Product, the Licensee will give notice to the University of the terms and amount of the comprehensive public liability and product liability insurance which it has placed in respect of the same, which in no case shall be less than the insurance which a reasonable and prudent corporation carrying on a similar business would acquire. This insurance shall be placed with a reputable and financially secure insurance carrier, shall include the University, the Board of Governors, its faculty, officers, employees, students and agents as additional insureds, and shall provide primary coverage with respect to the activities contemplated by this Agreement. Such policy shall include severability of interest and cross-liability clauses and shall provide that the policy shall not be canceled or materially altered except upon at least 30 days' written notice to the University. The University shall have the right to require reasonable amendments to the terms or the amount of coverage contained in the policy. Failing the parties agreeing on the appropriate terms or the amount of coverage, then the matter shall be determined by arbitration as provided for herein. The Licensee shall provide the University with certificates of insurance evidencing such coverage seven days before commencement of sales of any Product and the Licensee covenants not to sell any Product before such certificate is provided and approved by the University.


11.02 INSURANCE REQUIRED FOR SUBLICENSEES. The Licensee shall require that each sublicensee under this Agreement shall procure and maintain, during the term of the sublicense, public liability and product liability insurance in reasonable amounts, with a reputable and financially secure insurance carrier. The Licensee covenants that no party shall be subrogated to the rights of the Licensee for the purposes of pursuing any claim against the University.

11.03 INSURANCE NOT TO AFFECT INDEMNITIES. The existence of any insurance policies above will not relieve the Licensee from their obligations under the indemnification provisions contained in this Agreement.

SECTION 12 - DISCLAIMER OF WARRANTIES, LIMITATION OF LIABILITY

12.01 NO WARRANTIES. The University makes no representations or warranties, either express or implied, with respect to the Technology or Products and specifically disclaims any implied warranty of merchantability or fitness for a particular purpose. The University warrants and represents that it has the authority to license the Patent Rights to the Licensee in accordance with the terms herein.

12.02 NO LIABILITY FOR LOSS OF PROFITS. The University shall not under any circumstances be liable for any loss of profits, be they direct, consequential, incidental, or special or other similar or like damages arising from any defect, error or failure to perform with respect to the Technology or Products, even if the University has been advised of the possibility of such damages.

12.03 FURTHER LIMITATION OF LIABILITY. Notwithstanding any other provision of this Agreement, the University shall not be liable for any indirect, consequential, incidental, special or other similar damages, that may arise in any manner.

12.04 ADDITIONAL DISCLAIMERS. Nothing in this Agreement shall be construed as:

(a) a warranty or representation by the University as to the validity or scope of the License granted pursuant to this Agreement,

(b) a warranty or representation by the University that anything made, used, sold or otherwise disposed of under the License granted in this Agreement is or will be free from infringement of patents, copyrights, trade-marks, registered design or other intellectual property rights,

(c) an obligation by the University to bring or prosecute actions or suits against third parties for infringement of patents, copyrights, trade-marks, registered design or other intellectual property or contractual rights, or

(d) the conferring by the University of the right to use in advertising or publicity the University Trade-marks.


12.05 ENFORCEMENT OF TECHNOLOGY. In the event of an alleged infringement of the Technology or any right with respect to the Technology, the Licensee shall have the right to prosecute litigation designed to enjoin infringers of the Technology upon notification to the University. The University agrees to co-operate to the extent of executing all necessary documents and to vest in the Licensee the right to institute any such suits so long as all the direct or indirect costs and expenses of bringing and conducting any such litigation or settlement shall be borne by the Licensee and in such event recoveries shall enure to the Licensee.

12.06 INFRINGEMENT ACTIONS BY THIRD PARTIES. In the event of any complaint alleging infringement or violation of any patent or other proprietary rights is made against the Licensee with respect to the use of the Technology or the manufacture, use or sale of the Products, the following procedure shall be adopted:

(a) the Licensee shall promptly notify the University upon receipt of any such complaint and shall keep the University fully informed of the actions and positions taken by the complainant and taken or proposed to be taken by the Licensee,

(b) subject to this section, all costs and expenses incurred by the Licensee in investigating, resisting, litigating and settling such a complaint, including the payment of any award of damages and/or costs to any third party, shall be borne by the Licensee,

(c) no decision or action concerning or governing any final disposition of the complaint shall be taken without full consultation with and by the University,

(d) the University may elect to participate formally in any litigation involving the complaint, to the extent that the court may permit but any additional expenses generated by such formal participation shall be borne entirely by the University (subject to the possibility of recovery of some or all of such additional expenses from the complainant),

(e) if the complainant is willing to accept an offer of settlement and one of the parties to this Agreement is willing to make or accept such offer and the other is not, then the unwilling party shall conduct all further proceedings at its own expense, and shall be responsible for the full amount of any damages, costs, accounting of profits and settlement costs in excess of those provided in such offer, but shall be entitled to retain into itself the benefit of any litigated or settled result entailing a lower payment of costs, damages, accounting of profits and settlement costs than that provided in such offer.

(f) the royalties and any milestone payments payable pursuant to this Agreement shall be paid by the Licensee to the University in trust from the date the complaint is made until such time as a resolution of the complaint has been


finalized. If the complainant prevails in the complaint, then the royalties paid to the University in trust pursuant to this Section shall be returned to the Licensee, provided that the amount returned to the Licensee hereunder shall not exceed the amount paid by the Licensee to the complainant in the settlement or other disposition of the complaint including reasonable Licensee legal costs. If the complainant does not prevail in the complaint, then the University shall be entitled to all royalties paid to it pursuant to this Section. Where the Licensee is thereafter obliged to also make royalty payments to the complainant (the "Third Party Payment"), it shall be entitled to deduct such Third Party Payment from the royalties otherwise payable hereunder, provided that the royalties payable to the University shall not be reduced by more than 50% of the royalties as currently calculated, had the complainant not been successful.

SECTION 13 - TERMINATION FOR DEFAULT

13.01 This Agreement may be terminated by either party, upon giving notice in writing to the other of its intention to do so, in the event that:

(a) such party makes an assignment for the benefit of creditors, appoints a receiver or manager for itself or a substantial part of its assets, or otherwise takes advantage of any statute or law designed for the relief of debtors; or

(b) such party is petitioned under any legislation in respect to bankruptcy or insolvency legislation by a third party and does not successfully challenge such petition within sixty (60) days following the filing of such petition; or

(c) any resolution is passed or order made or other steps taken for the winding up, liquidation or other termination of the corporate existence of such party, unless such is taken in conjunction with a corporate restructuring or reorganization or sale of the party as a going concern, or if such party ceases to carry on business;

it being acknowledged that termination shall be effective upon delivery of a notice in accordance with Section 16.09 for any of (a), (b) or (c) hereof, without any further period of time permitted to such defaulting party to cure the default;

(d) such party fails to pay any monies required to be paid pursuant to this Agreement within five (5) days of the date due for payment, provided that written notice of such default has been delivered by the other party in accordance with Section 16.09 and the defaulting party fails within ten (10) Business Days after receipt of such notice to make such payment;

(e) such party fails to perform or otherwise breaches any material obligation hereunder, and such defaulting party has not cured the default, failure or breach within thirty (30) days following the giving of written notice in accordance with Section 16.09 hereof, or such longer period as may be


reasonably required in the circumstances, so long as the defaulting party is diligently pursuing its obligations to cure; or

(f) if the Licensee grants a security interest in the Technology to any other party without the prior written consent of the University.

In no event, shall any such notice of termination or intention to terminate be deemed to waive any rights of such party's right to claim damages or to any other remedy which the party giving the notice of breach may have as a consequence of the other party's failure or breach.

13.02  Intentionally deleted.

13.03  RIGHTS UPON TERMINATION. If this Agreement is terminated pursuant to
       Section 13.01,

(a) all remaining Materials shall be returned to the University;

(b) all rights to the Technology (except Licensee Improvements) and the University Improvements shall revert to the University; and

(c) the Licensee shall cease to use the Technology (except Licensee Improvements to the extent practicing Licensee Improvements would not infringe Patent Rights) in any manner whatsoever or to manufacture the Products within five days of the date on which this Agreement is terminated ("Effective Date of Termination"), Saturdays, Sundays and statutory holidays excepted. The Licensee shall then deliver or cause to be delivered to the University a complete final accounting of all Net Revenue and of all other amounts payable to the Licensee in respect of the sublicensing of the Technology and/or the sale or distribution of Products, within 30 days from the Effective Date of Termination. The accounting will also specify, in or on such terms as the University may in its sole discretion require, the inventory or stock of Products manufactured and remaining unsold (the "Unsold Products") on the Effective Date of Termination. If requested by the University, the Unsold Products shall be sold under the direction of the University until the Unsold Products have all been sold or the University waives any further interest in the Unsold Products. The Licensee will make royalty payments to the University in the same manner specified in Section 5 herein on all Unsold Products.

13.04 PRESERVATION OF ALL REMEDIES AND RIGHTS. Upon any termination of this Agreement, the non-defaulting party shall have the right to enforce one or more remedies successively or concurrently in accordance with applicable law and retains all rights and remedies against the defaulting party. The University may proceed to enforce payment of all debts owed to the University and to exercise any or all of the


rights and remedies contained herein or otherwise available to the University by law or in equity.

13.05 NON-WAIVER. No condoning, excusing or overlooking by any party of any default, breach or non-observance by any other party at any time or times in respect of any covenants, provisos, or conditions of this Agreement shall operate as a waiver of such party's rights under this Agreement in respect of any continuing or subsequent default, breach or non-observance, so as to defeat in any way the rights of such party in respect of any such continuing or subsequent default or breach and no waiver shall be inferred from or implied by anything done or omitted by such party, save only an express waiver in writing.

No exercise of a specific right or remedy by any party precludes it from or prejudices it in exercising another right or pursuing another remedy or maintaining an action to which it may otherwise be entitled either at law or in equity.

SECTION 14 - INDEMNITY

14.01 LICENSEE'S INDEMNITY. The Licensee hereby agrees to indemnify and hold harmless the University, its Board of Governors, officers, employees and agents against any and all claims arising out of the exercise of any rights of the Licensee under this Agreement including, without limiting the generality of the foregoing, against any damages or losses, consequential or otherwise, arising from or out of the use of Technology or Products licensed under this Agreement by the Licensee or its Affiliates, sublicensees, or agents, or their customers or end-users howsoever the same may arise.

14.02 ACKNOWLEDGEMENT OF EXPERTISE BY LICENSEE. The Licensee covenants and agrees that it has the expertise necessary to handle the Technology and the Products with care and without danger to the Licensee, its employees, agents, or the public. The Licensee covenants that it will not accept delivery of the Technology until it has requested and received from the University all necessary information and advice to ensure that it is capable of handling the Technology in a save and prudent manner in accordance with this Section 14.02.

14.03 COMPLIANCE BY LICENSEE WITH LAWS. The Licensee covenants and agrees that it will comply with all laws, regulations and ordinances, whether federal, provincial, municipal or otherwise with respect to the Materials, the Technology and/or this Agreement.

SECTION 15 - ADDITIONAL COVENANTS OF LICENSEE

15.01 CHANGE OF CONTROL. Unless otherwise agreed between the parties, the Licensee shall notify the University in writing within 30 days following:


(a) the sale of a controlling interest (as defined in 1.01(a)) in the Licensee to pass to any person or persons other than those having a controlling interest at the date hereof whether by reason of purchase of shares or otherwise, or

(b) a reorganization of the Licensee (whether by merger, amalgamation or otherwise) or the transfer of any part of its business to a subsidiary or associated company.

15.02 POWER OF ENTRY. The Licensee shall permit any duly authorized representative of the University during normal business hours and at the University's sole risk and expense with two days notice to enter upon and into any premises of the Licensee for the purpose of inspecting the Products and the manner of their manufacture and the use of the Materials and the Technology and generally of ascertaining whether or not the provisions of this Agreement have been, are being, or will be complied with by the Licensee.

SECTION 16 - GENERAL

16.01 RELATIONSHIP. Nothing contained herein shall be deemed or construed to create between the parties hereto a partnership, joint venture or employment relationship. No party shall have the authority to act on behalf of any other party, or to commit any other party in any manner or cause whatsoever or to use any other party's name in any way not specifically authorized by this Agreement. No party shall be liable for any act, omission, representation, obligation or debt of any other party, even if informed of such act, omission, representation, obligation or debt.

16.02 GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the laws of the Province of Ontario and the laws of Canada applicable therein.

16.03 DISPUTE RESOLUTION. In the event of a dispute between the parties arising out of or in connection with this Agreement or regarding the interpretation of the provisions hereof, the procedure set forth in Schedule "A" shall apply.

16.04 INTERIM PROTECTION. Section 16.03 shall not prevent a party hereto from applying to a court of competent jurisdiction for interim protection such as, by way of example, an interim injunction.

16.05 ENUREMENT. Subject to the limitations hereinbefore expressed, this Agreement shall enure to the benefit of and be binding upon the parties, and their respective successors and permitted assigns.

16.06 HEADINGS. Marginal headings as used in this Agreement are for the convenience of reference only and do not form a part of this Agreement and are not be used in the interpretation hereof.


16.07 SURVIVAL OF COVENANTS. The terms and provisions, covenants and conditions contained in this Agreement which by the terms hereof require their performance by the parties hereto after the expiration or termination of this Agreement including, without limitation the provisions of Section 8, shall be and remain in force notwithstanding such expiration or other termination of this Agreement for any reason whatsoever.

16.08 SEVERABILITY. In the event that any part, section, clause, paragraph or subparagraph of this Agreement shall be held to be indefinite, invalid, illegal or otherwise violable or unenforceable, the entire agreement shall not fail on account thereof, and the balance of the Agreement shall continue in full force and effect.

16.09 NOTICES. All notices, requests, directions or other communications required or permitted herein will be in writing and will be delivered to the parties hereto respectively as follows:

If to the Licensee:

Biostream, Inc.
160 Second Street
Cambridge, Massachusetts
USA 02142

Attention: Dr. John Babich, President and C.E.O.

Telecopier No: 617-492-5664

If to the University:

Respecting administrative and financial matters, and interpretation, amendment or termination of this Agreement:

Office of Industry Liaison
Stevenson-Lawson Building
Room 319
The University of Western Ontario
London, Ontario
N6A 5B8

Attention: Director

Telecopier No: 519-661-3907


FOR SCIENTIFIC AND TECHNICAL MATTERS:

Department of Chemistry
Faculty of Science
The University of Western Ontario
London, Ontario
N6A 5B8
Attention: Duncan Hunter

Telecopier No: 519-661-3022

In order for any notice, request, direction, or other communication to be effective, it will be delivered in person or sent by registered mail or facsimile (followed by hard copy) addressed to the party for whom it is intended at the above-mentioned address and will be deemed to have been received if delivered in person, when so delivered; and if sent by registered mail, when the postal receipt is acknowledged by the other party; if sent by facsimile, when transmitted. Notwithstanding the foregoing, any notice where a party gives notice of termination or of its intention to terminate under Section 13 shall be delivered by courier with signed receipt. The address of either party may be changed by notice in the manner set out in this provision.

16.10 ENTIRE AGREEMENT. This Agreement sets forth the entire understanding between the parties and no modifications hereof shall be binding unless executed in writing by the parties hereto.

16.11 TIME OF THE ESSENCE. Time shall be of the essence of this Agreement.

16.12 NUMBER, GENDER. Whenever the singular or masculine or neuter is used throughout this Agreement the same shall be construed as meaning the plural or feminine or body corporate when the context of the parties hereto may require.


IN WITNESS WHEREOF the parties hereto have executed this Agreement as of the date first written above.

THE BOARD OF GOVERNORS OF
THE UNIVERSITY OF WESTERN ONTARIO

By:  /s/ Douglas S. Gill
     ---------------------------------------
     Douglas Gill
     Director, Office of Industry Liaison

I have authority to bind the University.

BIOSTREAM, INC.

By:  /s/ John W. Babich
     ---------------------------------------
     Name: JOHN W. BABICH
     Title: PRESIDENT

By:
Name:


Title:

I/we have authority to bind the Corporation.


SCHEDULE "A"

DISPUTE RESOLUTION

In the event a dispute or disagreement (hereinafter called "Dispute") arises between the parties in connection with the interpretation of any provision of this Agreement or the compliance or non-compliance therewith, or the validity or enforceability thereof, or the performance or non-performance of either party to the Agreement, the following Dispute resolution process shall be followed by the parties:

i. A Dispute will be deemed to have arisen upon the delivery of a written notice by one party to the other describing the Dispute (herein called the "Dispute Notice"). Upon delivery of the Dispute Notice, the parties agree to attempt to resolve the Dispute in a prompt and expeditious manner. Except for the Dispute Notice, all communications between the parties will be on a without prejudice basis.

ii. If the parties have not been able to resolve the dispute in a prompt and expeditious manner after delivery of the Dispute Notice, either party may at any time thereafter request by written notice to the other party that the Dispute be escalated to Senior Management.

iii. In the event such a request with written notice is made, each party shall make available the senior executives specified in the following subsection ("Senior Management") who shall meet within fifteen (15) Business Days after such request is made at the offices of the party which received the request to attempt to resolve the Dispute.

iv. The Senior Management appointee for each party is as follows:

Licensee: Dr. John Babich, President and CEO

University: Mr. Doug Gill, Director, Office of Industry Liaison

Either party may change its Senior Management appointee upon prior written notice to the other.

In case such Dispute is not settled amicably by Senior Management within thirty
(30) days of escalation to Senior Management, such Dispute shall be arbitrated by an Arbitration Board acting in accordance with the provisions of the Arbitration Act, 1991 (Ontario), whose decision shall be final and binding upon the parties. The Arbitration Board shall consist of the person or person that the parties may agree on and in default of agreement within twenty (20) days following the expiration of the above-mentioned thirty (30) day period, each of the parties in dispute shall nominate one member to serve on the Arbitration Board and shall give notice to the other party of the name of its nominee. If one party fails to give this notice within fifteen (15) days after the other party has done so, then the member nominated by the other party shall constitute the


Arbitration Board. If each party gives this notice, then the two members so nominated by agreement shall select a third member who shall be Chairman. If the original two members are unable to agree upon a third member within thirty (30) days after the second notice has been given, then either party may apply to a Judge of an appropriate court of the jurisdiction in which the arbitration will take place to appoint the third member who shall be unconditionally accepted by both parties. The place of arbitration for disputes for which arbitration is initiated by either party shall be Toronto, Ontario. Each member shall have knowledge of and experience in the nuclear medicine industry. The language of any arbitration will be English.

The arbitration hearing shall commence within sixty (60) days after appointment of the Arbitration Board is done and shall be completed and a binding award rendered in writing within sixty (60) days after commencement of the hearing unless exceptional circumstances warrant delay. The decision of the Arbitration Board may be entered in any court of competent jurisdiction and execution entered thereupon forthwith. The law specified in Section 16.02 of This Agreement above shall apply.

Each party shall bear the cost of preparing its own case. The Arbitration Board shall have the right to include in the award the prevailing party's costs of arbitration and reasonable fees of attorneys, accountants, engineers and other professionals incurred by it in connection with the arbitration.

Notwithstanding the provisions of this Schedule "A", the parties recognize that a party may desire to seek emergency, provisional, or summary relief (including temporary injunctive relief) to enforce the provisions of this Agreement relating to protection of Intellectual Property and/or Confidential Information. A party may seek such relief, provided, however, that immediately following the issuance of any emergency, provisional, temporary injunctive or summary relief, any such judicial proceedings shall be stayed (and each party shall consent to such stay) pending resolution of any related underlying claims between the parties.


SCHEDULE "B"
DILIGENCE BY LICENSEE

Years 2001 and 2002 Licensee is funding additional research by way of a two-year contract research agreement with the University. During this period there shall be no additional diligence requirements.

During the year 2003, Licensee will label one Product candidate with the licensed technology and complete all animal toxicology studies necessary to file an IND in the US and shall file an IND either in the US or its equivalent in Canada.

During the year 2004, Licensee will begin a Phase I clinical trial of a Product candidate.

During the year 2005, Licensee will begin a Phase II clinical trial of a Product candidate.

During the year 2006, Licensee will begin a Phase III clinical trial of a Product candidate.

During the year 2007, Licensee will file a US NDA or its equivalent in Canada for a Product candidate.

Licensee will achieve its first sale of Product within six months of US FDA approval of a NDA or equivalent approval in Canada.

If at any time the Product candidate fails in human trials, Licensee shall within 30 days of that determination notify the University and Licensee shall have the opportunity to label another Product candidate with the licensed technology and the timeline for Diligence by Licensee shall be restarted.

In any year after 2002 if Licensee funds additional research on the licensed technology at the same or greater levels as in 2001 and 2002, then the Section 10.01 diligence requirements shall be waived for that year.


[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

Exhibit 10.17

EXCLUSIVE LICENSE AGREEMENT

THIS AGREEMENT made as of September 5th, 2003.

BETWEEN:

MOLECULAR INSIGHT PHARMACEUTICALS, INC. F/K/A BIOSTREAM, INC.

a corporation incorporated under the laws of the State of Massachusetts, and having a place of business at 160 Second Street, Cambridge, MA, (the "Licensee")

AND:

THE UNIVERSITY OF WESTERN ONTARIO,

a corporation under the Universities Act (Ontario)


(the "University")

WHEREAS:

A) the University is the owner of certain Technology (as defined herein) relating to the University's Invention Numbers 01-003 and 02-018 known as:
"Polymer Precursors of Radiolabeled Compounds and Methods of Making and Using the Same" and "Polymer-Supported Propenyl Mesylates as Precursors for the Radiolabelling of Amines, Sulfides and Ethers" respectively, and has the authority and capacity to grant licenses to the Technology;

B) the University wishes to have the Technology developed and commercialized to benefit the public and is willing to grant a license to any underlying Patent Rights thereto; and

C) the Licensee wishes to obtain from the University and the University has agreed to grant a license to the Licensee to commercially exploit the Technology on the terms set out.

NOW THEREFORE in consideration of the premises and of the mutual covenants set forth herein, the parties hereto agree as follows:

ARTICLE 1 - DEFINITIONS

1.1 For purposes of this Agreement, the following words and phrases shall have the following meanings:

(a) "Business Day" means every day other than Saturday, Sunday, and statutory holidays in the Province of Ontario or the Commonwealth of Massachusetts;

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(b) "Confidential Information" means scientific, technical and/or business information (including written descriptions, drawings, samples, compositions, formulae, visual demonstrations, prototypes and other data) which is disclosed by one party (the "Discloser") to the other party (the "Recipient") and which is in each case marked or identified (either in writing or orally) as confidential at the time of disclosure.

(c) "Effective Date" means the date on which this Agreement shall come into effect, which shall be the 5th day of September, 2003;

(d) "Field of Use" means all uses of the Technology;

(e) "Net Revenue" means all revenues and receipts directly or indirectly receivable by the Licensee and, where sublicensing is permitted hereunder, its sub-licensees or payable to the Licensee and its sub-licensees, from third party use, sale, distribution, leasing or sublicensing of Licensed Products and/or the use of Licensed Processes, calculated on the basis of the Licensee's fiscal year, or part thereof, less the following amounts relating to such sales: (i) discounts allowed in amounts that are reasonable and customary in the trade; (ii) actual freight and insurance costs incurred in transporting Licensed Products to such purchasers; (iii) sales, use, value-added and other direct taxes incurred in respect of sale of Licensed Products; (iv) customs duties, surcharges and other governmental charges incurred in connection with the export or import of Licensed Products; and (v) amounts credited or allowed on returns. No deductions shall be made for commissions or fees paid to persons whether independent sales agents, or are employed by the Licensee or its sub-licensee, or for other similar costs. Notwithstanding anything in this Agreement to the contrary, revenues and receipts shall be considered directly or indirectly receivable by Licensee when the Licensee receives such amounts owed to it; provided, however, that the Licensee has exercised commercially reasonable efforts to collect all amounts owed to it by its sub-licensees or other third parties in connection with the licenses granted hereunder in a timely manner. Licensed Products shall be deemed to have been sold and included in the Net Revenue of the Licensee and sub-licensee when invoiced, or if not invoiced, when delivered or paid for, whichever is the first to occur. Under no circumstances shall Net Revenue include any grant money or other funding received by the Licensee as re-imbursement of expenses associated with the research and development of the Technology by the Licensee.

(f) "Licensee" is the party of the first part and includes any corporation which controls, is controlled by, or is under common control with the Licensee; for this purpose, "control" means the direct or indirect ownership of voting shares carrying more than 50% of the votes for the election of directors;

(g) "Licensee Improvement" means any technology, whether patentable or not, that is developed by or under the direction of the Licensee and whose use would infringe one or more claims or rights under the Patent Rights or whose development has relied upon the Technology;

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(h) "Licensed Process" means any process which relies in whole or in part upon the Technology or which is covered in whole or in part by an issued, unexpired claim or pending claim contained in the Patent Rights;

(i) "Licensed Product" means any product or part thereof which:

(i) relies in whole or in part, upon the Technology, or is utilized to practise a Licensed Process; or

(ii) is produced or processed by using a Licensed Process; or

(iii) is covered in whole or in part by an issued, unexpired claim or a pending claim contained in the Patent Rights in the country in which any such product or part thereof is made, used or sold.

(j) "Materials" means any substance, product or compound (including all cell lines, vectors, plasmids, clones, micro organisms, anti-bodies, antigens, test plates, reagents, chemicals, compounds, physical samples, models and specimens) delivered by the University to the Licensee, and the Materials specifically described in Schedule "C", and all progeny, mutants and derivatives thereof supplied by the University;

(k) "Milestone Payments" has the meaning set forth in Section 5.2;

(l) "Patent Rights" means any of the following intellectual property of the University:

(i) patents and/or patent applications listed in Schedule "A";

(ii) patents issued from the applications listed in Schedule "A", or from divisions or continuations of such applications, or any re-issues of such patents; or

(iii) such other statutory or common law protection as may be available to the University in connection with such patents or patent applications listed on Schedule A.

(m) "Royalty Due Date" means the date 30 days following the last day of March, June, September and December of each and every year during which this Agreement remains in full force and effect, commencing on January 30, 2004;

(n) "Territory" means worldwide;

(o) Technology" means any and all knowledge, know-how, information, software and/or techniques invented, developed or acquired or being invented, developed and/or acquired prior to or after the Effective Date by the University, and any Materials related thereto, all of which are related to the Patent Rights, University Improvements or Licensee Improvements as applicable, provided that for the purposes of determining University

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ownership of Technology, Licensee Improvements developed solely by the Licensee shall be excluded.

(p) "University Improvement" means any technology, whether patentable or not, that is created by the University under the research program of Dr. Duncan Hunter or whose use would infringe one or more claims or rights under the Patent Rights; and

(q) "Trade-marks" means any mark, trademark, service mark, logo, insignia, seal, design or other symbol or device used by the University or Licensee and associated with or referring to either of the University or Licensee, as the case may be, or any of its facilities, property or products.

ARTICLE 2 - GRANT OF RIGHTS AND TERM

2.1 LICENSE. Subject to the terms and conditions of this Agreement, the University hereby grants to the Licensee the right and license, within the Field of Use and in the Territory, to use, modify, improve, sublicense or otherwise exploit, for commercial and non-commercial purposes, the Technology, the Patent Rights, and/or University Improvements as applicable, and, to make, have made, use, lease, sell, distribute and import Licensed Products and to use, modify, improve, sublicense and otherwise exploit, for commercial and non-commercial purposes, the Licensed Processes, until the end of the earlier of 20 years from the Effective Date of this Agreement or the term for which a patent or patents under the Patent Rights are granted, and in the latter instance, on a country by country basis, unless this Agreement is sooner terminated according to the terms hereof. Notwithstanding anything to the contrary, the license granted hereunder shall not be construed to confer any rights or benefits upon the Licensee by implication, or otherwise, as to any patents, technology or rights not specifically included in the Technology.

2.2 PERIOD OF EXCLUSIVITY. In order to establish a period of exclusivity for the Licensee, the University hereby agrees that it shall not grant any other license to make, have made, use, lease, sell and distribute the Technology, the Patent Rights, the University Improvements or the Licensed Products or to utilize Licensed Processes in the Territory for the Field of Use during the period of time commencing the Effective Date and terminating upon expiration of any patent issued on a country by country basis.

2.3 RIGHTS RETAINED BY UNIVERSITY. Nothing in this Agreement shall affect the University's right to use the Technology or to use and distribute the Materials to third parties for research, teaching and other non-commercial uses and the Licensee hereby grants back to the University rights to use the Patent Rights, whether for the University's own purposes or in conjunction with other similar research institutions, for research, teaching and other non-commercial applications, including technical services and industrially sponsored research. This grant to the University expressly excludes any rights to use the Patent Rights alone or in conjunction with others, for commercial purposes.

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2.4 OWNERSHIP, IMPROVEMENTS. The parties acknowledge that the University shall retain ownership of the Technology excluding all Licensee Improvements. The Licensee shall own all Licensee Improvements, provided that the Licensee hereby grants to the University a perpetual, non-exclusive royalty-free right to use all Licensee Improvements solely for research, teaching and other non-commercial uses in accordance with the rights granted under Section 2.3.

2.5 REPORT OF IMPROVEMENTS. From time to time and in any event at least annually:

(a) the Licensee shall disclose in writing to the University the details of all Licensee Improvements; and

(b) the University shall disclose in writing to the Licensee the details of all University Improvements, for the purposes of causing same to be part of the grant of rights in the Technology hereunder.

2.6 RESTRICTION ON DISCLOSURE; USE OF TRADE-MARKS. Neither party shall disclose any of the financial terms and conditions of this Agreement but shall be entitled to reveal the parties and the nature of the license granted. Neither Party shall use any of the other's Trade-marks or make reference to the other for any advertising or publicity purposes, without the prior written consent of that party. Notwithstanding the foregoing, the parties (and their representatives) may disclose to any person or entity the tax treatment and tax structure of the transactions contemplated by this Agreement and any materials (including opinions and other tax analyses) provided to them relating to the tax treatment and tax structure of the transactions contemplated herein.

ARTICLE 3 - SUBLICENSES

3.1 SUBLICENSES. The Licensee shall have the right to grant sublicenses of the rights, privileges and licenses granted hereunder within the Territory during the exclusive period of this Agreement in accordance with the provisions of Section 3.2. Upon any termination of this Agreement, and at the election of the University, any sub-licensees' rights shall also terminate.

3.2 COVENANTS OF SUB-LICENSEES.

(a) Licensee covenants and agrees that it shall cause any sublicense agreement entered into by it to contain, on the part of such sub-licensee, covenants in favour of the University with respect to the obligations set forth in Sections 3.1, 6.1 and Articles 10 and 12 herein, and that to the extent there exists an inconsistency between the sublicense agreement and this Agreement, any such inconsistency or conflict will be resolved in favour of this Agreement. In granting any sublicense hereunder, the Licensee undertakes to observe and perform any obligations of the sub-licensee, to intent that none of the rights, entitlements or remedies of the University are impaired by the granting of such sublicense. The Licensee shall deliver to the University a true copy of such sublicense agreement upon execution.

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

(b) In addition, all sublicenses shall be subject to the following conditions:

(i) in no event will a sub-licensee be permitted to further sublicense or to assign or transfer any rights which have been granted to it by the Licensee (except to the extent that such assignment is in connection with the sale of all or substantially all of the assets or stock of such sub-licensee or in connection with the merger or similar transaction between such sub-licensee and a third party and University is notified of such assignment); and

(ii) the Licensee shall not be entitled to receive from any sub-licensee any consideration or matter of value in lieu of cash payments not otherwise part of Net Revenue, in consideration for any sublicense under this Agreement, without the express prior written consent of the University.

ARTICLE 4 - LICENSEE'S PERFORMANCE OBLIGATIONS

4.1 LICENSEE'S COMMERCIALIZATION DUE DILIGENCE; MILESTONE OBLIGATIONS. The Licensee shall use commercially reasonable efforts to bring one or more Licensed Products or Licensed Processes to market through a thorough, concerted and diligent program for exploitation of the Technology and to continue active, diligent marketing efforts for one or more Licensed Products or Licensed Processes during the entire period that this Agreement is in effect, in order to meet the milestones set out on Schedule "D" from time to time.

4.2 ACKNOWLEDGEMENT OF EXPERTISE BY LICENSEE. The Licensee covenants and agrees that it has the expertise necessary to handle the Technology, Materials, the Licensed Products and the Licensed Processes with care and without danger to the Licensee, its employees, agents, or the public, and to observe and perform the covenants and obligations set out herein.

4.3 COMPLIANCE BY LICENSEE WITH LAWS. The Licensee covenants and agrees that it will comply with all laws, regulations and ordinances, whether federal, provincial, state, municipal or otherwise, as appropriate, with respect to the Materials, the Technology, the Licensed Products, the Licensed Processes and this Agreement.

4.4 FAILURE TO MEET PERFORMANCE REQUIREMENTS. In the event the Licensee fails to meet any of the milestones or performance criteria set forth in Schedule D, or observe and perform the obligations set forth under any of Sections 4.1 or 4.3, such shall constitute a default under this Agreement pursuant to Section 13.2 hereof.

4.5 NO PRIOR SECURITY INTERESTS. The Licensee covenants that it will not grant a security interest in or to the Technology.

ARTICLE 5 - FEES, ROYALTIES AND PAYMENTS

5.1 INITIAL LICENSE FEE. The Licensee shall pay to the University, an initial license fee with respect to the issuance of the license, of Canadian $[******]. The said sum shall

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

be deemed earned and due immediately upon the Effective Date, and shall not be refundable to the Licensee in whole or in part under any circumstances.

5.2 ROYALTY FOR DISCOVERY, RESEARCH AND DEVELOPMENT USES.

(a) The Licensee shall pay to the University, in advance, an annual fee of Canadian $[******] ([***************] dollars) per year for seven years commencing on the anniversary of the Effective Date beginning one year after the Effective Date, and thereafter on each successive anniversary of the Effective Date. The parties are agreed that no payment shall be required for that period from the Effective Date to the first anniversary thereof; and

(b) As further consideration for the value of the Technology for application as a discovery tool and use as a research and development platform by the Licensee ("Research Uses"):

(i) Licensee shall pay to the University a royalty of [********] percent ([***]%) of the Net Revenue receivable by the Licensee that is attributable to products sold, made, or distributed directly by Licensee to third parties where such products rely upon such Research Uses and which no longer are relying upon the Technology directly;

(ii) Where Licensee provides Research Uses to third parties on a fee-for-service basis, Licensee shall pay a royalty to the University of [**************] percent ([***]%) of the Net Revenue receivable by the Licensee in connection with such fee-for-service work which relies upon such Research Uses; and

(iii) Where the Licensee has previously provided to third parties Research Uses on a fee-for-service basis and such third party thereafter sells, makes or distributes a product that relies on such Research Uses, the Licensee shall pay to the University a royalty of [********************] ([***]%) of the Net Revenue receivable by the Licensee as a royalty payment from such third party in connection with products which rely upon such Research Uses and which do not require a sublicense of the Technology.

5.3 MILESTONE PAYMENTS. The Licensee shall pay to the University milestone product development payments with respect to achievement of each of the enumerated events arising from the development of each of the Licensed Products and/or Licensed Processes, all as set forth in the table below, with each payment becoming due and payable on the first date of completion for each element of every Class ("Class" means any of Cardiology, Oncology, Central Nervous System, Infection, and Vascular Disease) of Licensed Product and/or Licensed Process of such milestone, regardless of the country in which achievement of such milestone first occurs:

                Milestone                   Payment
                ---------                   -------
Initiation of Phase I Clinical Trial        Canadian $[******]
Completion of Phase II Clinical Trial       Canadian $[******]
Completion of Phase III Clinical Trial      Canadian $[******]
Grant of Regulatory Approval                Canadian $[******]

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[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

For certainty with respect to milestone product development payments, there are four (4) milestones anticipated for each of the five (5) Classes.

5.4 ANNUAL ROYALTIES AND PAYMENTS. In consideration of the license granted hereunder, the Licensee shall pay to the University subject to Section 5.6 below:

(a) a royalty of [**************] percent ([***]%) of Net Revenue; For greater clarification, on sales between Licensee, and/or its Affiliates, sub-licensees or agents for resale purposes, the royalty shall be paid only on the resale value by such Affiliate, sublicense, or agent. Such royalties shall become due and payable on each Royalty Due Date, and shall be calculated with respect to Net Revenue for the calendar quarter immediately preceding the month in which the applicable Royalty Due Date occurs; and

(b) in addition to such annual royalties in subsection (a) hereof, [**** ***********] percent ([***]%) of:

(i) initial up-front fees, or other consideration (including equity or other participation), or in-kind or non-monetary contribution, if any, receivable by Licensee upon its execution of or pursuant to the terms of any sub-license agreement related to the use of the Technology, Materials, Licensed Products or Licensed Processes; and

(ii) any payments or other consideration (including equity or other participation), or in-kind or non-monetary contribution receivable by Licensee upon the successful achievement of milestones set forth in, and pursuant to the terms of, any sublicense agreement related to the use of the Technology, Materials, Licensed Products or Licensed Processes. The Licensee shall be entitled to deduct from any of the foregoing consideration received that portion which is a reimbursement of its direct, out-of-pocket costs for research projects funded on behalf of the sub-licensee relating to the Licensee's Improvements after the effective date of the sub-license agreement.

Any payments under this subsection (b) shall be following receipt by the Licensee of the fees, consideration, or in-kind or non-monetary contribution, provided Licensee has exercised commercially reasonable efforts to collect such amount or entitlement owing.

Notwithstanding anything herein to the contrary, the University acknowledges and agrees, that it is not entitled to any compensation, royalty or payment whatsoever in connection with any payments or other consideration (including equity or other participation), with respect to third party equity investments in the Licensee which are not directly attributable to the sub-licensing of any of the Technology, Materials, Licensed Products or Licensed Processes.

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5.5 CURRENCY AND PLACE OF PAYMENTS. All payments to be made by the Licensee to the University hereunder shall be made in Canadian dollars at London, Ontario without deduction of taxes or other fees of any other kind whatsoever, which may be imposed by any government, and which taxes or fees shall be paid by the Licensee. Where any payment or amount is denominated in a currency other than Canadian dollars, it shall be converted to the equivalent in Canadian dollars at the rate of exchange set by the Bank of Montreal in Toronto, Canada for converting the currency of such amount into Canadian dollars, on the last Business Day of the reporting period to which such payment relates.

5.6 NO DUPLICATION OF PAYMENTS. For clarification, the royalties owed pursuant to clauses (b)(i), or (b)(iii) of Section 5.2 and clause (a) of Section 5.4 are to be independent of each other.

ARTICLE 6 - RECORDS AND REPORTING

6.1 ACCOUNTING RECORDS. The Licensee shall maintain at its principal place of business, separate accounts and records of transactions arising pursuant to this Agreement, such accounts and records to be in sufficient detail to enable proper returns to be made under this Agreement, and the Licensee shall include a similar requirement of its sub-licensees in any sublicense agreement.

6.2 REPORTS. The Licensee shall deliver to the University by no later than each Royalty Due Date, together with the royalty payment required, a report (the "Accounting") setting out particulars of the sale, distribution, leasing or sublicensing of the Licensed Products and/or Licensed Processes as shall be requisite for the payment of royalties, including the following:

(a) the number of Licensed Products sold by Licensee and all sub-licensees in each country during the applicable royalty period;

(b) the gross revenue for Licensed Products charged by Licensee and all sub-licensees during the applicable royalty period;

(c) an accounting for all Licensed Processes used, sold, leased, or, if applicable, licensed by the Licensee and all sub-licensees;

(d) a calculation of Net Revenue in each country including a listing of applicable deductions and evidence of the Licensee's payment of withholding taxes;

(e) a listing of additional payments or consideration from sub-licensees under Section 5.4(b); and

(f) total royalties payable on Net Revenue in Canadian dollars, together with the exchange rates used for any currency conversion in accordance with Section 5.5.

The Licensee shall also provide to the University periodic reports at all significant stages and milestones in the development, manufacture and sale, distribution,

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leasing or sublicensing of the Licensed Products and/or Licensed Processes, including but not limited to, the milestones described in Sections 4.1, 4.4 and 5.2, by no later than thirty (30) days following the completion of such stage or milestone; such reports shall be in sufficient detail to enable the University to assess the status of all required regulatory approvals relating to the Licensed Products, and whether the Licensee is meeting its obligations under Sections 4.1, 4.4 and 5.2 during the term of this Agreement.

6.3 GENERALLY ACCEPTED ACCOUNTING PRINCIPLES (GAAP). The calculation of royalties shall be made in accordance with generally accepted accounting principles from time to time approved by the Federal Bureau of Accounting Standards applied on a consistent basis with the Licensee's past practices. Licensee certifies that its accounting practices comply with the Federal Bureau of Accounting Standards.

6.4 RETENTION OF ACCOUNTS AND RECORDS. The Licensee shall retain the accounts and records referred to in Section 6.1 for at least three (3) years after the date upon which they were made.

6.5 AUDIT RIGHT. During the term of this Agreement and for one (1) year thereafter, the University may at its cost and expense audit or cause to be audited, no more than once in any twelve month period, the applicable books, records of other relevant materials of the Licensee referable hereto, to verify any report rendered hereunder. The audit must be on reasonable advance, written notice, and be conducted during normal business hours of the Licensee. The Licensee shall furnish such reasonable evidence as such representative will deem necessary to verify the Accounting and may permit such representative to make copies of or extracts from such accounts, records and agreements at the University's expense. If the audit reveals an underpayment by the Licensee of three (3) percent or more of royalties payable in any fiscal year of the Licensee, the Licensee shall pay to the University such deficiency within fifteen
(15) days of the determination thereof, together with interest thereon from the date such amount was due to the date of payment, and shall further reimburse the University for its full and reasonable out-of-pocket costs of the audit. In any other instance of overpayment or underpayment by the Licensee, the appropriate payment of such deficiency or refund shall be made within fifteen (15) days following the determination thereof, together with interest thereon and the University shall bear its own costs of the audit.

6.6 POWER OF ENTRY. The Licensee shall permit any duly authorized representative of the University during normal business hours and at the University's sole risk and expense to enter upon and into any premises of the Licensee for the purpose of inspecting the Products and the manner of their manufacture, and the use of the Materials, the Technology and the Licensed Processes; and generally ascertaining whether or not the provisions of this Agreement have been and, are being complied with by the Licensee.

6.7 SURVIVAL OF THIS ARTICLE AFTER TERMINATION. Notwithstanding the termination of this Agreement, this Article 6 shall remain in full force and effect until:

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(a) all payments and royalties required to be made by the Licensee to the University under this Agreement have been made by the Licensee to the University; and

(b) any other claims of any nature or kind whatsoever of the University against the Licensee arising out of the termination have been settled.

ARTICLE 7 - REPRESENTATIONS AND WARRANTIES

7.1 Each of the University and the Licensee warrants and represents to the other, and acknowledges that the other has relied upon the completeness and accuracy of such representations and warranties in entering into this Agreement, namely:

i) it has the corporate capacity to enter into this Agreement and to perform each of its obligations hereunder; and

ii) it has duly authorized, executed and delivered the Agreement, and the Agreement constitutes a legal, valid and binding obligation of it, enforceable against it in accordance with its terms, except only as such enforcement may be limited by applicable bankruptcy, insolvency and other laws of general application affecting the enforcement of creditors' rights and subject to general equitable principles.

7.2 The University warrants and represents to the Licensee, and acknowledges that the Licensee has relied upon the completeness and accuracy of such representation and warranties in entering into this Agreement, namely:

i) as at the date hereof, it has all right, title and interest in and to the Technology and the Patent Rights, free and clear of any security interests, liens or other similar encumbrances and possesses all rights necessary to grant the license set forth herein;

ii) as at the date hereof, there is no litigation or other claim pending or threatened involving the Technology or the Patent Rights;

iii) as of the date hereof, there is no claim pending or, to the University's knowledge, threatened by a third party alleging that the Technology or Patent Rights infringes the intellectual property rights of such third party and the University has no reason to believe that there is a basis for such claim; and

iv) it has not entered into any options, licenses or other agreements with third parties relating to the Technology or Patent Rights which would conflict with the rights and licenses granted to the Licensee herein.

ARTICLE 8 - PATENT PROSECUTION

8.1 PATENT RIGHTS. The Licensee hereby recognizes and acknowledges the ownership rights of the University to the Technology, as applicable, the validity of the Patent Rights licensed hereunder, and agrees not to contest the ownership of the Technology or the validity of the Patent Rights, either directly or indirectly by assisting other parties, nor to initiate or participate with an interference application in connection with Patent Rights.

Page 11 of 27

8.2 PATENT PROSECUTION AND PATENT COSTS. The Licensee shall pay for all reasonable fees and costs relating to the filing, prosecution and maintenance of the Patent Rights incurred after the Effective Date and during the term of the Agreement on behalf of the University: provided, however, that, subject to Section 8.4 below, the Licensee shall control the process of, and select counsel of its choosing for, such filing, prosecution and maintenance. The Licensee shall have primary responsibility for the filing, prosecution and maintenance of patents and/or patent applications worldwide for those inventions within the Patent Rights, at the Licensee's expense, provided that the Licensee shall consult with the University as to the prosecution and maintenance of all such patent applications within the Patent Rights prior to any substantive deadline or action, and shall not substantially limit the scope of patent protection without the University's consent, which consent shall not be unreasonably withheld or delayed. The Licensee shall furnish the University with copies of all relevant documents upon filing the same with the patent office of any country. Subject to Section 8.4 below, the University shall not take any action with respect to such patents or patent applications without the Licensee's prior written consent.

8.3 COPIES OF PATENT RELATED MATERIALS. The University shall provide the Licensee with copies of the patent applications and all official correspondence with the respective patent and trademarks office(s) relating to the Patent Rights which exist as of the Effective Date. In addition, the Licensee shall provide to the University copies of all patent applications, maintenance therefor and all official correspondence with the respective Patent and Trademark Office relating to the Patent Rights from and after the Effective Date, in accordance with its obligations under Section 8.2 hereof, in order that the University is advised sufficiently in advance of any deadlines for patent prosecution or maintenance in connection with the Patent Rights.

8.4 UNIVERSITY PATENT PROSECUTION. In the event that the University has notified the Licensee in writing that it desires to file for patent protection in a country or countries and the Licensee declines to do so in writing, the university shall notify the Licensee in writing of its intention to file for such patent protection in such country or countries (the "Patent Notice", which Patent Notice must specifically state the country and scope of the patent protection desired) and, if the Licensee has not responded within ten (10) business days after its receipt of the Patent Notice that the Licensee will seek such patent protection pursuant to this Section 8, the University may file for, prosecute and maintain such patent (as set forth in the Patent Notice) with counsel of its choosing. The University will provide copies of all documents related thereto to the Licensee. Notwithstanding the foregoing, the University must have a good faith business reason for seeking such patent protection pursuant to this Section 8.4 prior to delivering the Patent Notice to the Licensee.

8.5 UNIVERSITY RIGHTS RE PROSECUTION. In the event that the Licensee fails to prosecute any application or maintain the existence of Patent Rights for which the Licensee is responsible hereunder, the University shall be entitled to assume the obligations of the Licensee, as contemplated by
Section 8.2 hereof, and may elect that the Licensee's failure to diligently prosecute and/or maintain such Patent Rights is a default of the Licensee for which termination rights by the University are exercisable in accordance with Article 13. Notwithstanding anything herein to the contrary, the University's termination rights set forth in this
Section 8.5 shall not be applicable with

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respect to any patents which the Licensee has declined to pursue pursuant to Section 8.4 or for which the patent process has not been initiated by either party in such country or countries.

ARTICLE 9 - INFRINGEMENT

9.1 Enforcement of Rights Against Third Parties.

(a) In the event of an alleged infringement of the Patent Rights or an unauthorized use of the Technology by a third party in the Territory for the Field of Use after the Effective Date, the Licensee shall have the obligation to prosecute, at its own expense, any such alleged infringement, upon receipt of prior written notice of such claim from the University. The University agrees to co-operate to the extent of executing all necessary documents to vest in the Licensee the right to institute any such suits, and the right to use the University's name as a party plaintiff. No settlement, consent, judgment or other voluntary final disposition of the suit may be entered into without the consent of the University, which consent shall not unreasonably be withheld or delayed. At any time during the prosecution of the action by the Licensee, the University may participate, at its own expense, in the prosecution of such action. The Licensee shall indemnify the University against any order for costs that may be made against the University in such proceedings.

(b) In the event that the Licensee undertakes assertion of rights with respect to the Technology or the enforcement of the Patent Rights by litigation, the Licensee may withhold up to fifty percent (50%) of the payments otherwise thereafter due to the University under Article 5 hereunder and apply such withheld amounts toward reimbursement of up to fifty percent (50%) of Licensee's expenses, including reasonable attorneys' fees, in connection therewith. Any recovery of damages by Licensee for each such suit shall be issued in the name of the Licensee and the University jointly, and shall be applied first in satisfaction of all of any unreimbursed expenses and legal fees of Licensee relating to such suit, and next applied for all payments to the University under Article 5 past due or withheld pursuant to this Article 9. The balance remaining thereafter from any such recovery shall be divided equally between the Licensee and the University. The Licensee shall provide to the University an accounting for all costs, expenses and disbursements incurred with respect to the defence or enforcement of the action. In the event that the enforcement of the Patent Rights by the Licensee is not successful, or the Licensee does not recover 50% of its legal fees and expenses from the withheld royalty amounts, the Licensee surrenders and foregoes any further entitlement to offset any amounts against the royalty payments otherwise payable under Article 5.

(c) In the event that the enforcement of the Patent Rights by the Licensee or the University is not successful, the Licensee shall have the right to terminate this Agreement upon sixty (60) days written notice to the University, provided that the obligations of the Licensee for payment under Section 9.1 (b) have been fulfilled. Alternatively, the Licensee and the University may enter

Page 13 of 27

renegotiations of a new royalty rate, having regard to the nature and extent of the Technology and/or Patent Rights as are available to be licensed to the Licensee, pursuant to a revised agreement.

(d) Notwithstanding the foregoing, the University shall have the right to enter into a contract with the successful third party with respect to licensing of rights from it in order to permit the continued use of the License hereunder for the Technology, and in such case, the terms of this Agreement shall continue in full force and effect.

9.2 CO-OPERATION BETWEEN THE PARTIES. In any infringement suit to enforce the Patent Rights pursuant to this Agreement, the University shall, at the request and expense of the Licensee, cooperate in all respects and, to the extent possible, have its employees testify when requested and make available relevant records, papers, information, samples, specimens and the like.

9.3 RIGHT TO SUBLICENSE ALLEGED INFRINGER. The Licensee shall have the right, in accordance with the terms and conditions herein, including without limitation Article 5, to sublicense any alleged infringer in the Territory for the Field of Use for future use of the Technology or the Patent Rights, as the case may be.

9.4 INFRINGEMENT ACTIONS BY THIRD PARTIES. In the event that a complaint alleging infringement or violation of any patent or other proprietary rights is made against the Licensee with respect to the use of the Technology or the Patent Rights after the Effective Date, the following procedure shall be adopted:

(a) the Licensee shall promptly notify the University upon receipt of any such complaint and shall keep the University fully informed of the actions and positions taken by the complainant and taken or proposed to be taken by the Licensee;

(b) subject to this section, all costs and expenses incurred by the Licensee in investigating, resisting, litigating and settling such a complaint, including the payment of any award of damages and/or costs to any third party, shall be borne by the Licensee;

(c) no settlement or compromise of the complaint shall be taken without full consultation with and approval by the University, which approval shall not be unreasonably withheld or delayed;

(d) the University may elect to participate formally in any litigation involving the complaint, to the extent that the court may permit, but any additional expenses generated by such formal participation shall be borne entirely by the University (subject to the possibility of recovery of some or all of such additional expenses from the complainant); and

(e) if the complainant is willing to accept an offer of settlement and one of the parties to this Agreement is willing to make or accept such offer and the other is not, then the unwilling party shall conduct all further proceedings at its own expense, and shall be responsible for the full amount of any damages, costs, accounting of

Page 14 of 27

profits and settlement costs in excess of those provided in such offer, but shall be entitled to retain unto itself the benefit of any litigated or settled result entailing a lower payment of costs, damages, accounting of profits and settlement costs than that provided in such offer.

9.5 UNIVERSITY INDEMNIFICATION. Notwithstanding anything herein to the contrary, the University shall indemnify and hold harmless the Licensee for any breach of representations and warranties set forth in Article 7 herein. In the event of a claim for indemnification by the Licensee pursuant to this Section 9.5, the Licensee shall provide written notice of such claim to the University and the University, in the case such claim involves a third party, shall assume the defense and/or settlement of such claim at its sole cost and expense; provided, however, that the University may not settle or otherwise compromise such claim without the prior written consent of the Licensee, which consent shall not be unreasonably withheld or delayed and which consent shall not be required if such settlement or compromise includes a full release of the Licensee and the ability of the Licensee to continue to use and exploit the license and other rights granted herein.

ARTICLE 10 - CONFIDENTIALITY

10.1  MUTUAL OBLIGATION OF CONFIDENTIALITY. Each party shall treat all
      Confidential Information in respect of which it is the Recipient as
      confidential and shall not disclose any Confidential Information to any
      third party or use the Confidential Information for any purpose other than
      for the purposes of fulfilling its obligations under this Agreement. The
      Recipient shall use at least the same standard of care in protecting the
      Confidential Information as it uses in protecting its own information of a
      similar nature but, in any event, no less than a reasonable standard of
      care. Without limiting the generality of the foregoing, the Licensee shall
      not, both during the term of this Agreement and at all times thereafter,
      disclose any of the University's Confidential Information to any person
      other than a prospective permitted sublicensee or an employee of or
      consultant to the Licensee who shall have entered into a confidential
      disclosure agreement in form and substance satisfactory to the University.
      Any Confidential Information will be disclosed within the Recipient only
      on a "need to know" basis.

10.2  EXCLUSIONS FROM CONFIDENTIALITY. Notwithstanding Section 10.1, the
      obligations regarding confidentiality shall not apply to information
      which:

      (a)   was in Recipient's possession before receipt from the Disclosing
            Party, as established by documentary evidence; or

      (b)   is or becomes a matter of public knowledge without breach of this
            Agreement by Recipient; or

      (c)   is received by Recipient from a third party which had no duty of
            confidentiality with respect to it; or

      (d)   is independently developed by the Recipient as established by
            documentary evidence; or

                                                                   Page 15 of 27

      (e)   is made subject to an order by judicial or administrative process
            requiring Recipient to disclose any or all of the information,
            provided that the Recipient shall use reasonable efforts in the
            circumstances to promptly notify the Disclosing Party of such
            requirement to enable the Disclosing Party to oppose such process,
            before disclosure occurs; or

      (f)   is disclosed by Recipient with the Disclosing Party's prior written
            approval.

10.3  INJUNCTION. The parties acknowledge that if a party breaches the
      provisions of this Article 10, there may not be an adequate remedy at law
      through damages. Accordingly, the parties agree that a non-defaulting
      party shall have the right to seek and obtain temporary and permanent
      injunctive relief to restrain a violation of this Article 10. The parties
      acknowledge that the provisions herein are reasonable, and are fully
      required to protect the legitimate interests of the affected party.

ARTICLE 11 - DISCLAIMER OF WARRANTIES BY UNIVERSITY AND LIMITATION OF LIABILITY

11.1  DISCLAIMER OF WARRANTIES BY THE UNIVERSITY. Except as expressly set forth
      in this Agreement, the University, its trustees, officers, employees,
      students and agents make no representations or warranties of any kind,
      either express or implied, and there are no conditions, either express or
      implied. Without limiting the generality of the foregoing, there are no
      express or implied warranties of merchantability or fitness for a
      particular purpose, or the absence of latent or other defects. The
      Licensee acknowledges that it has been advised by the University to
      undertake its own due diligence, including independent legal advice, with
      respect to the Technology and the terms of this Agreement.

11.2  LIMITATION OF THE UNIVERSITY'S LIABILITY. Except for claims for
      indemnification pursuant to Section 9.5 herein, the aggregate damages for
      which the University shall be liable shall not exceed the amount of
      royalties paid by the Licensee to the University for the year in which the
      cause of action giving rise to the damages occurred. In no event shall the
      University, its trustees, officers, students, employees or agents be
      liable for any indirect, consequential, incidental, or special damages of
      any kind whatsoever, including, but not limited to, economic damage or
      injury to property or lost profits, even if the University has been
      advised of or knows of the possibility of such damages.

11.3  LIMITATION OF THE LICENSEE'S LIABILITY. In no event shall the Licensee,
      its officers, directors, consultants, employees or agents be liable for
      any indirect, consequential, incidental, or special damages of any kind
      whatsoever, including but not limited to, economic damage or injury to
      property or lost profits, even if the Licensee has been advised of or
      knows of the possibility of such damages.

11.4  ADDITIONAL DISCLAIMERS. Nothing in this Agreement shall be construed as:

                                                                   Page 16 of 27

      (a)   an obligation by the University to bring or prosecute actions or
            suit against third parties for infringement of copyrights,
            trade-marks, registered design or other intellectual property or
            contractual rights, or

      (b)   the conferring by either party of any right to use in advertising,
            publicity or otherwise the Trade-marks or the name of the other
            party.

ARTICLE 12 - LICENSEE INDEMNITY AND INSURANCE

12.1  LICENSEE'S INDEMNITY. The Licensee shall at all times during the term of
      this Agreement and thereafter, indemnify, defend and hold harmless the
      University, its trustees, directors, officers, employees, students and
      agents, against all claims, proceedings, demands and liabilities of any
      kind whatsoever (including but not limited to reasonable legal fees and
      disbursements) incurred in connection with the Licensee's use of the
      Technology or the Materials, or from the Licensee's production,
      manufacture, sale, use, lease, consumption or advertisement of the
      Licensed Product(s) and/or Licensed Process(es), or arising from any right
      or obligation of the Licensee hereunder, excepting only claims that the
      Patent Rights infringe intellectual property rights of third parties.

12.2  INSURANCE REQUIRED FOR LICENSEE. Prior to the first sale of a Licensed
      Product or use of a Licensed Process, the Licensee will give notice to the
      University of the terms and amount of the comprehensive public liability
      and product liability insurance which it has placed in respect of the
      same, together with a certificate therefor. Such insurance shall be no
      less than the insurance which a reasonable and prudent corporation
      carrying on a similar business would acquire. This insurance shall be
      placed with a reputable and financially secure insurance carrier, shall
      include the University, as an additional insured, shall contain a waiver
      of subrogation against the University, and shall provide that the policy
      shall not be cancelled or materially amended except upon at least thirty
      (30) days' written notice to the University. The Licensee covenants not to
      sell any Licensed Product nor use any Licensed Process before such
      insurance is effective. The Licensee shall require that each sub-licensee
      under this Agreement shall procure and maintain equivalent insurance
      coverages.

12.3  INSURANCE NOT TO AFFECT INDEMNITIES. The existence of any insurance
      policies will not relieve the Licensee from its obligations under the
      indemnification provisions contained in this Agreement.

ARTICLE 13 - TERMINATION

13.1  TERMINATION BY THE UNIVERSITY. The University may, at its option and in
      its sole discretion, terminate this Agreement immediately on the happening
      of any one or more of the following events by delivering notice in writing
      to that effect to the Licensee:

      (a)   if the Licensee is more than thirty (30) days in arrears of fees,
            royalties or payments due under this Agreement, which is not cured
            within ten (10) business days after written notice thereof;

Page 17 of 27

(b) if the Licensee fails to observe or perform any other obligations required hereunder, including the failure to meet milestones as provided under Section 4.4, and such failure continues for a period in excess of thirty (30) days following written notice;

(c) if the Licensee grants a security interest in any of the rights under or in this Agreement in priority to any interest claimed by the University;

(d) if the Licensee seeks creditor protection; or if any execution, sequestration, or any another process of any court becomes enforceable against the Licensee; or if any such process is levied on the rights under this Agreement or upon any of the monies due to the University and is not released or satisfied by the Licensee within sixty (60) days thereafter;

(e) if any resolution is passed or order made or other steps taken for

            the winding up, liquidation or other termination of the existence of
            the Licensee, or if the Licensee ceases or threatens to cease to
            carry on its business.

13.2  TERMINATION BY EITHER PARTY. In addition to Section 13.1, if either party
      shall be in default under or shall fail to comply with the terms of this
      Agreement and if such default is not cured within thirty (30) days after
      written notice of such default, or such default is not cured within such
      further reasonable period of time as may be necessary, provided that the
      defaulting party is diligently seeking to remedy such default, then the
      non-defaulting party shall have the right to terminate this Agreement
      immediately by giving written notice to that effect to the party in
      default

13.3  RIGHTS UPON TERMINATION. If this Agreement is terminated pursuant to
      Section 13.1 or 13.2 hereof;

      (a)   all Confidential Information of the University and all remaining
            Materials shall be returned to the University;

      (b)   all Confidential Information of the Licensee shall be returned to
            the Licensee;

      (c)   all rights to the Technology, other than Licensee Improvements, and
            including, without limitation any rights to Patent Rights, Materials
            or use of Licensed Products or Licensed Processes and any other
            rights granted hereunder shall revert to the University; and

      (d)   The Licensee and any sub-licensee thereof may sell all Licensed
            Products remaining in inventory or stock on the effective date of
            the termination of this Agreement (the "Effective Date of
            Termination") and may complete any Licensed Products in the process
            of manufacture on the Effective Date of Termination, provided that
            the Licensee shall otherwise cease to use the Licensed Processes or
            to manufacture the Licensed Products or to practise the Technology
            in any manner whatsoever. The Licensee shall then deliver or cause
            to be delivered to the University a complete final accounting of all
            Net Revenue and of all other amounts payable to the Licensee in
            respect of the sublicensing of the Technology and/or the sale or
            distribution of Licensed

                                                                   Page 18 of 27

            Products and/or Licensed Processes, and shall make payments to the
            University required by Article 5 hereof, all within ninety (90) days
            following the Effective Date of Termination.

13.4  PRESERVATION OF ALL REMEDIES AND RIGHTS. Upon any termination of this
      Agreement, the non-defaulting party shall have the right to enforce one or
      more remedies successively or concurrently in accordance with applicable
      law and retains all rights and remedies against the defaulting party. The
      University may proceed to enforce payment of all debts owed to the
      University and to exercise any or all of the rights and remedies contained
      herein or otherwise available to the University by law or in equity.

13.5  NON-WAIVER. No condoning, excusing or overlooking by any party of any
      default, breach or non-observance by any other party at any time or times
      in respect of any covenants, provisos, or conditions of this Agreement
      shall operate as a waiver of such party's rights under this Agreement in
      respect of any continuing or subsequent default, breach or non-observance,
      so as to defeat in any way the rights of such party in respect of any such
      continuing or subsequent default or breach and no waiver shall be inferred
      from or implied by anything done or omitted by such party, save only an
      express waiver in writing.

      No exercise of a specific right or remedy by any party precludes it from
      or prejudices it in exercising another right or pursuing another remedy or
      maintaining an action to which it may otherwise be entitled either at law
      or in equity.

ARTICLE 14 - GENERAL

14.1  RELATIONSHIP. Nothing contained herein shall be deemed or construed to
      create between the parties hereto a partnership, joint venture or
      employment relationship. No party shall have the authority to act on
      behalf of the other party, or to commit the other party in any manner or
      cause whatsoever or to use the other party's name in any way not
      specifically authorized by this Agreement. Neither party shall be liable
      for any act, omission, representation, obligation or debt of the other
      party, even if informed of such act, omission, representation, obligation
      or debt.

14.2  GOVERNING LAW. This Agreement shall be governed by and construed and
      applied in accordance with the laws of the Province of Ontario and the
      laws of Canada applicable in such Province, except that questions
      regarding the construction and effect of any patent shall be determined by
      the laws of the country in which the patent was granted.

14.3  DISPUTE RESOLUTION. In the event of a dispute between the parties arising
      out of or in connection with this Agreement or regarding the
      interpretation of the provisions hereof other than in connection with
      whether an event of default has occurred, the procedure set forth in
      Schedule "B" shall apply.

14.4  ENUREMENT, SURVIVAL OF COVENANTS. Subject to the limitations hereinbefore
      expressed, this Agreement shall enure to the benefit of and be binding
      upon the parties, and their respective successors and permitted assigns.
      The terms and

                                                                   Page 19 of 27

      provisions, covenants and conditions contained in this Agreement which by
      the terms hereof require their performance by the parties hereto after the
      expiration or termination of this Agreement shall be and remain in force
      notwithstanding such expiration or other termination of this Agreement for
      any reason whatsoever.

14.5  NO ASSIGNMENT. Neither the Licensee nor the University shall be entitled
      to assign, transfer, mortgage, charge or otherwise dispose of this
      Agreement or any interest therein, or of any of the rights, duties or
      obligations granted hereunder (any of the foregoing being an
      "Assignment"), without the express written consent of the other, such
      consent not to be unreasonably withheld or delayed, and any attempt to
      effect such Assignment shall cause such Assignment to be void. Assignment
      shall not include any assignment by operation of law, or any change in
      shareholder control of the Licensee, if a corporation, it being agreed
      that the Licensee may assign the Agreement, and its rights hereunder,
      without the University's prior consent upon the sale of all or
      substantially all of the Licensee's stock or assets to a third party or
      upon the consummation of a merger or similar transaction by the Licensee
      with a third party. Within thirty (30) days, Licensee will provide written
      notice of such assignment.

14.6  ENTIRE AGREEMENT; SEVERABILITY. This Agreement sets forth the entire
      understanding between the parties and no modifications hereof shall be
      binding unless set forth in a written agreement or other document executed
      by the parties hereto. In the event that any part, section, clause,
      paragraph or subparagraph of this Agreement shall be held to be invalid,
      illegal or otherwise unenforceable, the entire agreement shall not fail on
      account thereof, and the balance of this Agreement shall continue in full
      force and effect.

14.7  HEADINGS, NUMBER, GENDER. Marginal headings as used in this Agreement are
      for the convenience of reference only and do not form a part of this
      Agreement and are not be used in the interpretation hereof. Whenever the
      singular or masculine or neuter is used throughout this Agreement the same
      shall be construed as meaning the plural or feminine or body corporate
      when the context of the parties hereto may require.

14.8  NOTICES. All notices, requests, directions or other communications
      ("Notices") required or permitted herein will be in writing and will be
      delivered to the parties hereto respectively as follows:

      IF TO THE LICENSEE:

      Molecular InSight Pharmaceutical, Inc. f/k/a Biostream, Inc.
      160 Second Street
      Cambridge, MA
      USA 02142

      Attention: John E. McCray, COO

      Facsimile No: 617-492-5664

                                                                   Page 20 of 27

      With a copy to:

      Gabor Garai, Esq.
      Epstein Becker & Green, P.C.
      111 Huntington Avenue
      Boston, MA
      USA 02199

      Facsimile No.: 617-342-4001

      IF TO THE UNIVERSITY:

      Respecting administrative and financial matters, amendment or termination
      of this Agreement:

      Office of Industry Liaison
      Stevenson-Lawson Building
      Room 319
      The University of Western Ontario
      London, Ontario N6A 5B8

      Attention:    Director

      Facsimile No: 519-661-3907

Respecting scientific and technical matters:

Department of Chemistry
Faculty of Science
The University of Western Ontario
London, Ontario
N6A 5B8

Attention: Dr. Duncan Hunter

Facsimile No: 519-661-3022

In order for any notice, request, direction, or other communication to be effective, it will be delivered by courier or sent by facsimile (followed by hard copy) addressed to the party for whom the Notice is intended at the above-mentioned address and will be deemed to have been received on the date of delivery if delivered by courier, and if sent by facsimile, on the next business day following electronic confirmation of the successful transmission of the facsimile. The address of either party may be changed by notice in the manner set out in this provision.

14.9 TIME OF THE ESSENCE. Time shall be of the essence of this Agreement.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first written above.

Page 21 of 27

THE UNIVERSITY OF WESTERN ONTARIO

By:   /s/ Douglas S. Gill
      -----------------------------------
      Doug Gill
      Director, Office of Industry Liaison
I have authority to bind the University.

MOLECULAR INSIGHT PHARMACEUTICAL, INC.
f/k/a Biostream, Inc.

By:   /s/ John W. Babich
      -----------------------------------
      John W. Babich
      President

I have authority to bind the Corporation.

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SCHEDULE A

United States Patent Applications and Foreign Patent Applications:

"Polymer Precursors of Radiolabeled Compounds and Methods of Making and Using the Same"
PCT PCT/IB02/01958 and US filed 03/04/2002 Inventors: Duncan Hunter and Mustafa Janabi Derived from US Provisionals 60/272,324 (filed 03/02/2001) and 60/280,225 (filed 03/30/2001) (our ref 01-003).

United States Provisional Patent Application:

"Prosthetic Groups Useful in the Synthesis of Radiopharmaceuticals" Serial No. 60/467,752, filed May 2, 2003 Inventors: Duncan Hunter and Karen Gagnon (our ref. 02-018).

Page 23 of 27

SCHEDULE B

DISPUTE RESOLUTION

In the event a dispute or disagreement (hereinafter called "Dispute") arises between the parties in connection with the interpretation of any provision of this Agreement or the compliance or non-compliance therewith, or the validity or enforceability thereof, or the performance or non-performance of either party to the Agreement, the following Dispute resolution process shall be followed by the parties:

i. A Dispute will be deemed to have arisen upon the delivery of a written notice by one party to the other describing the Dispute (herein called the "Dispute Notice"). Upon delivery of the Dispute Notice, the parties agree to attempt to resolve the Dispute in a prompt and expeditious manner. Except for the Dispute Notice, all communications between the parties will be on a without prejudice basis.

ii. If the parties have not been able to resolve the dispute in a prompt and expeditious manner after delivery of the Dispute Notice, which time period shall not exceed thirty (30) days after such notice, either party may at any time thereafter request by written notice to the other party that the Dispute be escalated to Senior Management.

iii. In the event such a request with written notice is made, each party shall make available the senior executives specified in the following subsection ("Senior Management") who shall meet within fifteen (15) Business Days after such request is made at the offices of the party which received the request to attempt to resolve the Dispute.

iv. The Senior Management appointee for each party is as follows:

Licensee: John W. Babich, President

University: Vice-President, Research

Either party may change its Senior Management appointee upon prior written notice to the other.

In case such Dispute is not settled amicably by Senior Management within thirty
(30) days of escalation to Senior Management, such Dispute shall be arbitrated by a single arbitrator acting in accordance with the provisions of the Arbitration Act, 1991 (Ontario), whose decision shall be final and binding upon the parties. The arbitrator shall be the person that the parties may agree on and in default of agreement within twenty (20) days following the expiration of the above-mentioned thirty (30) day period, then either party may apply to a Judge of a court having jurisdiction to appoint the single arbitrator who shall be unconditionally accepted by both parties. The place of arbitration for disputes for which arbitration is initiated by either party shall be London, Ontario. The arbitrator as selected or appointed shall have knowledge of and experience in the pharmaceutical industry. The language of any arbitration will be English.

Page 24 of 27

The arbitration hearing shall commence within sixty (60) days after appointment of the arbitrator is done and shall be completed and a binding award rendered in writing within sixty (60) days after commencement of the hearing unless exceptional circumstances warrant delay. The decision of the arbitrator may be entered in any court of competent jurisdiction and execution entered thereupon forthwith. The law specified in Section 14.2 of this Agreement shall apply.

Each party shall bear the cost of preparing its own case. The arbitrator shall have the right to include in the award the prevailing party's costs of arbitration and reasonable fees of attorneys, accountants, engineers and other professionals incurred by it in connection with the arbitration. Failing a specific award, the parties shall share equally the costs of the arbitrator and arbitration proceedings.

Notwithstanding the provisions of this Schedule, the parties recognize that a party may desire to seek emergency, provisional, or summary relief (including temporary injunctive relief) to enforce the provisions of this Agreement relating to protection of intellectual property and/or Confidential Information. A party may seek such relief, provided, however, that immediately following the issuance of any emergency, provisional, temporary injunctive or summary relief, any such judicial proceedings shall be stayed (and each party shall consent to such stay) pending resolution of any related underlying claims between the parties.

Page 25 of 27

SCHEDULE C

DESCRIPTION OF MATERIALS

Intentionally left blank.

Page 26 of 27

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 406 OF THE SECURITIES ACT OF 1933, AS AMENDED.

SCHEDULE D

COMMERCIALIZATION DUE DILIGENCE REQUIREMENTS
AND MILESTONES

A. Licensee shall support contract research in the laboratory of Dr. Duncan Hunter in the amount of Canadian $[******] for the period May 1, 2003 to September 30, 2004. Licensee shall commit resources internally at a level not less than Canadian $[******] for the period from October 1, 2004 to September 30, 2005.

B. Commencing August 1, 2005 for a period not to exceed thirty (30) days, Licensee and University shall negotiate in good faith further commercialization due diligence requirements and milestones to be incorporated into this Schedule D. Such negotiation will consider the commercial readiness of the Technology and Licensee's commercialization plans. It is anticipated such further commercialization due diligence requirements and milestones will include for example levels of research support, anticipated timelines for identification of lead compounds, advancement through clinical trial phases and ultimate commercial sales.

Page 27 of 27

                                                   INDUSTRY LIAISON
                                           The University of Western Ontario
[Research Western Logo]       1151 Richmond St. N.  -  Stevenson-Lawson Building, Room 328
                                         London, Ontario  -  Canada  -  N6A 5B8
                                 Tel: 519-661-4183 or 519-850-2307  -  Fax: 519-661-3907
                                                    anavarre@uwo.ca

AMENDMENT TO THE LICENSE MADE SEPTEMBER 5, 2003 FOR TECH IDS 01-003 AND 02-018

POLYMER SUPPORTED ALDEHYDES, ACIDS AND ACTIVATED ESTERS AS PRECURSORS FOR RADIO LABELLING OF AMINE BEARING COMPOUNDS.- TECH ID 01-003
POLYMER SUPPORTED PROPENYL MESYLATES AS PRECURSORS FOR THE RADIO LABELLING OF AMINES, SULFIDES AND ETHERS.- TECH ID 02-018

Hereby we agree to add Article 5.4(c):

The University of Western Ontario will provide Molecular Insight Pharmaceuticals, Inc. with administrative support for and monitoring of prosecution done by a single Patent Agent Firm.

The service fee of Canadian $2000.00 is payable annually on April 30th starting in 2005.

Molecular Insight Pharmaceuticals, Inc.        The University of Western Ontario


/s/ Dr. John Babich                            /s/ Dr. Alex Navarre
---------------------------------------        ------------------------------
Dr. John Babich                                Dr. Alex Navarre, Ph.D. M.B.A.
President and CSO                              Director, Industry Liaison
Date:                                          Date:

I have the authority to bind the Company       I have the authority to bind the
                                               University.

AN/ch


Exhibit 10.18

IMAGING BIOPHARMACEUTICALS, INC.

1997 STOCK OPTION PLAN

1. PURPOSE OF PLAN

The purpose of this plan (the "Plan") is to encourage key employees (including officers and directors who are employees), and officers, directors and consultants who are not employees, of Imaging Biophmaecuticals, Inc., a Massachusetts corporation, and any present or future subsidiary and parent of Imaging Biopharmaecuticals, Inc. (hereinafter collectively referred to as the "Company") to acquire shares of common stock of Imaging Biopharmaecuticals, Inc., $.01 par value, (the "Common Stock") and thereby increase their proprietary interest in the Company's success and provide an added incentive to remain in the employ of, or continue to render services to, the Company. The words "parent" and "subsidiary" shall be interpreted in accordance with Section 422 and Section 424 of the Internal Revenue Code of 1986, as amended from time to time (the "Code"). It is intended that options granted under the Plan shall constitute either "incentive stock options" within the meaning of-Section 422 of the Code or "non-qualified options" as determined by the Board of Directors of Imaging Biophmaecuticals, Inc. in its sole discretion and indicated on each form of option grant (the "Option Grant"). The terms of the Plan and Option Grants shall be construed accordingly. Only employees of the Company shall be eligible to receive incentive stock options.

2. SHARES RESERVED UNDER THE PLAN

Subject to the adjustment provided in Section 9, the aggregate number of shares of Common Stock of Imaging Biophannaecuticals, Inc. which may be issued and sold pursuant to options granted under the Plan shall not exceed 178,200 shares of Common Stock, which may be either authorized and unissued shares or treasury shares. If any options granted under the Plan shall terminate or expire without being fully exercised, the shares that have not been purchased will again become available for purposes of the Plan.

3. ADMINISTRATION

The Plan shall be administered solely by the Board of Directors. A majority of the members present at any meeting at which a quorum is present, and any acts approved in writing by all of the members of the Board of Directors without a meeting, shall constitute the acts of the Board of Directors. The Board of Directors shall have the powers granted to it throughout this Plan. The Board of Directors is authorized to interpret the Plan and, subject to the provisions of the Plan, to prescribe, amend, and rescind rules and regulations relating thereto. The Board of Directors is further authorized, subject to the express provisions of the Plan, to alter or amend the form of Option Grant attached hereto and to make all other determinations necessary or advisable in the administration of the Plan. The interpretation and administration by the Board of Directors of any provisions of the Plan and the Option Grant shall be find and conclusive on all


persons having any interest therein

No member of the Board of Directors shall be held liable for any action or determination made in good faith with respect to the Plan or any option granted thereunder.

4. OPTION GRANTS

Options to purchase shares of Common Stock under the Plan may be granted to key employees (including officers and directors who are employees) and officers, directors and consultants of the Company who are not employees of the Company. In selecting the individuals to whom options will be granted and in deciding how many shares of Common Stock will be subject to each option, the Board of Directors shall give consideration to the importance of an individual's duties, experience with the Company, future value to the Company, present and potential contribution to the success of the Company, and to such other factors as the Board of Directors may deem relevant. Subject to the express provisions of the Plan and the forms of Option Grant incorporated herein by reference as from time to time altered or amended, the Board of Directors shall have authority to determine with respect to each option Grant the number of installments, the number of shares of Common Stock in each installment and the exercise dates, and, to the extent not inconsistent with the applicable provisions of the Code, if any, the Board of Directors may specify additional restrictions and conditions. Each incentive stock option shall expire not later than ten years from the date of the grant of such option.

Except as provided in Section 7 below, no incentive stock option may be granted to any employee who, at the time such option is granted, owns stock possessing more than 10 percent of the total combined voting power of all classes of stock of the Company within the meaning of Section 422 of the Code.

The date of grant of an option to an individual under the Plan shall be the date the Board of Directors votes to grant the option, but no optionee shall have the right to exercise his option until the Company has executed and delivered the Option Grant to such optionee. Each option granted under the Plan shall be evidenced by and subject to the terms and conditions of the Option Grant which is incorporated into the Plan by reference as from time to time altered or amended.

No stock option may be transferred by the optionee other than by will or the laws of descent and distribution, and, solely in the case of non-qualified options, by a distribution pursuant to a qualified domestic relations order as defined by the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder, and can be exercised during the optionees life only by him.

5. OPTION PRICE

The price per share at which each option granted under the Plan may be exercised shall be determined by the Board of Directors subject to the provisions of this Section 5. In the case of an incentive stock option, the exercise price shall not be less than the fair market value

2

per share on the date of grant, as determined by the Board of Directors in good faith, in accordance with applicable provisions of the Code then in effect with respect to incentive stock options.

6. LIMITATION ON AMOUNT

The aggregate fair market value (determined at the time the option is granted) of the stock with respect to which incentive stock options are exercisable for the first time by an individual during any calendar year under all plans of the Company shall not exceed $100,000.

7. SPECIAL RULE FOR 10 PERCENT SHAREHOLDERS

The Board of Directors may grant incentive stock options under this Plan to persons who own more than 10 percent of the combined voting stock of the Company if (i) at the time of the Option Grant the price per share at which the option may be exercised is at least 110 percent of the fair market value of the stock subject to the option and (ii) such option is not exercisable after the expiration of five years from the date such option is granted.

8. NON-OUALIFIED OPTIONS

Notwithstanding the provisions of Sections 4, 5,6 and 7 of this Plan, the Board of Directors may grant options which in one or more respects do not meet the requirements for incentive stock options established by Section 422 of the Code. The Board of Directors shall indicate on each Option Grant whether an incentive stock option within the meaning of Section 422 of the Code or a non-qualified option is thereby granted.

Except as otherwise provided in this Plan, the Board of Directors, in its sole discretion, shall establish the terms and conditions for each non-qualified option which it grants. Such terms and conditions may, but need not, include some or all of the provisions of Section 4, 5,6 and 7 of this Plan with respect to incentive stock options. If the Board of Directors grants an option which in all respects meets the requirements for incentive stock options it may nonetheless designate such option a non-qualified option on the Option Grant, in which case it shall be deemed not to be an incentive stock option.

9. ADJUSTMENT OF SHARES RESERVED UNDER THE PLAN

The aggregate number and kind of shares reserved under the Plan, the maximum number of shares as to which options may be granted to any individual and the option price per share shall be appropriately adjusted by the Board of Directors in the event of any recapitalization of the Company.

10. DISSOLUTION OR REORGANIZATION

Prior to a dissolution, liquidation, merger, consolidation, or reorganization of the Company (the "Event"), the Board of Directors may decide to terminate each outstanding option. If the Board of Directors so decides, such option shall terminate as of the effective date of the

3

Event, but the Board of Directors shall suspend the exercise of all outstanding options a reasonable time prior to the Event, giving each optionee not less than fourteen days' written notice of the date of suspension, prior to which an optionee may purchase in whole or in part the shares available to him as of the date of receipt of the notice. If the Event is not consummated, the suspension shall be removed and all options shall continue in full force and effect.

11. AMENDMENT AND TERMINATION OF PLAN

The Board of Directors may amend, suspend, or terminate the Plan, including the form of Option Grant incorporated herein by reference. No such action, however, may, without approval or ratification by the shareholders, make any change which, pursuant to the Code or regulations thereunder, requires action by the shareholders. No such action may, without the consent of the holder of the option, alter or impair any option previously granted.

In any event, the Plan shall terminate 10 years from the date of adoption by the Board of Directors. Any shares remaining under the Plan at the time of termination which are not subject to outstanding options and any shares which thereafter become available because of the expiration or termination of an option shall cease to be reserved for purposes of the Plan.

12. RIGHT TO TERMINATE EMPLOYMENT

Nothing contained herein or in any Option Grant executed pursuant hereto shall restrict the right of the Company to terminate the employment of any optionee at any time.

13. DATE OF ADOPTION AND APPROVAL

The date of adoption of this Plan by the Board of Directors and the Plan's effective date is January 9, 1997. The date of approval of this Plan by the Shareholders of Imaging Biopharmaceuticals, Inc. is January 9, 1997.

4

Amendments to 1997 Stock Option Plan

1. On March 5, 1998, Imaging Biopharmaceuticals, Inc. changed its name to Biostream, Inc.

2. On February 29,2000 the 1997 Stock Option Plan was amended by the company's stockholders to increase the number of authorized shares of common stock available for issuance thereunder from 178,200 shares to 678,200 shares of Common Stock.

3. On April 12,2000 the Board of Directors of Biostream, Inc. declared a 2-for-1 common stock split, which split was approved by the stockholders on April 13,2000.

4. On January 23,2003 the 1997 Stock Option Plan was amended by the company's stockholders to increase the number of authorized shares of common stock available for issuance thereunder to an aggregate total of 13,000,000 shares of Common Stock.

5. On April 25,2003 Biostream, Inc. changed its name to Molecular Insight Pharmaceuticals, Inc.

5

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-1 of our report dated November 7, 2005 relating to the financial statements of Molecular Insight Pharmaceuticals Inc. and subsidiaries appearing in the Prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the heading "Experts" in such Prospectus.

/s/ Deloitte & Touche LLP

Boston, Massachusetts
November 7, 2005