SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549


FORM 8-K

CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934


Date of report (Date of earliest event reported): December 21, 2001

CYTRX CORPORATION
(Exact Name of Registrant as Specified in Charter)

         Delaware                        000-15327                58-1642750

(State or Other Jurisdiction     (Commission File Number)       (IRS Employer
     of Incorporation)                                       Identification No.)

154 Technology Parkway
Suite 200
Norcross, Georgia                                 30092
(Address of Principal Executive Offices)        (Zip Code)

Registrant's telephone number, including area code: (770) 368-9500

Not applicable
(Former Name or Former Address, if Changed Since Last Report)


ITEM 5. OTHER EVENTS.

On December 7, 2001, CytRx entered into a license agreement (the "License Agreement") with Vical Incorporated ("Vical") granting Vical exclusive, worldwide rights to use or sublicense CytRx's TranzFect poloxamer technology to enhance viral or non-viral delivery of polynucleotides (such as DNA and RNA) in all preventive and therapeutic human and animal health applications, except for
(1) four infectious disease vaccine targets previously licensed by CytRx to Merck & Co., Inc. and (2) DNA vaccines or therapeutics based on prostate- specific membrane antigen (PSMA). In addition, the License Agreement permits Vical to use TranzFect poloxamer technology to enhance the delivery of proteins in prime-boost vaccine applications that involve the use of polynucleotides. Under the License Agreement, CytRx received an up-front payment of $3,750,000 and has the potential to receive milestone and royalty payments in the future based on criteria described in the License Agreement.

A copy of the License Agreement is filed as Exhibit 99 hereto.

ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

(a) Financial Statements of Business Acquired.

Not applicable.

(b) Pro Forma Financial Information.

Not applicable.

(c) The following exhibits are filed as part of this Current Report on Form 8-K:

EXHIBIT NO.                 DESCRIPTION
-----------                 -----------

    99           License Agreement between Vical Incorporated and CytRx
                 Corporation*

* Confidential treatment has been requested with respect to certain portions of this agreement.

-2-

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

CYTRX CORPORATION

                                        By:  /s/ Mark W. Reynolds
                                           -------------------------------------
                                        Name:    Mark W. Reynolds
                                             -----------------------------------
                                        Title:   Vice President, Finance
                                              ----------------------------------

Dated: December 21, 2001


EXHIBIT 99

CONFIDENTIAL TREATMENT REQUESTED. CONFIDENTIAL
PORTIONS OF THIS AGREEMENT HAVE BEEN REDACTED
AND FILED SEPARATELY WITH THE COMMISSION.

LICENSE AGREEMENT
between
VICAL INCORPORATED
and
CYTRX CORPORATION


LICENSE AGREEMENT

THIS AGREEMENT (this "Agreement") effective as of December 7, 2001, (the "Effective Date") between Vical Incorporated, a corporation organized and existing under the laws of Delaware ("Vical") and CytRx Corporation, a corporation organized and existing under the laws of Delaware ("CytRx") collectively referred to hereinafter as the Parties.

WITNESSETH:
WHEREAS, CytRx has developed CytRx Know-How (as hereinafter defined) and has rights to Patent Rights (as hereinafter defined), collectively referred to as CytRx Poloxamer Intellectual Property (as hereinafter defined); and WHEREAS, CytRx has exclusively licensed to Merck & Co. ("Merck") CytRx Poloxamer Intellectual Property in a certain field ("Merck License"), a copy of which is attached hereto as Addendum 1.0; and WHEREAS, Vical desires to obtain a license under the CytRx Poloxamer Intellectual Property, upon the terms and conditions set forth herein and CytRx desires to grant such a license;
NOW, THEREFORE, in consideration of the foregoing premises and the mutual covenants herein contained, the Parties hereby agree as follows:

ARTICLE I
DEFINITIONS

Unless specifically set forth to the contrary herein, the following terms, whether used in the singular or plural, shall have the respective meanings set forth below:
1.1 The term "Affiliate" shall mean (i) any corporation or business entity of which fifty percent (50%) or more of the securities or other ownership interests representing the equity, the voting stock or general partnership interest are owned, controlled or held, directly or indirectly, by Vical or CytRx; or (ii) any corporation or business entity which, directly or indirectly, owns, controls or holds fifty percent (50%) (or the maximum ownership interest permitted by law) or more of the securities or other ownership interests representing the equity, the voting stock or, if applicable, the general partnership interest, of Vical or CytRx.
1.2 The term "Calendar Quarter" shall mean the respective periods of three (3) consecutive calendar months ending on March 31, June 30, September 30 and December 31.
1.3 The term "Calendar Year" shall mean each successive period of twelve (12) consecutive calendar months commencing on January 1 and ending on December 31.
1.4 The term "CytRx Know-How" shall mean information and materials, including but not limited to, discoveries, Improvements, processes, formulas, data, know-how and trade secrets, patentable or otherwise, which during the term of this Agreement (i) are in CytRx's possession or control, (ii) are not generally known, (iii) are necessary or useful to Vical in connection with the research, development, manufacture, marketing, use or sale of TranzFect and/or Licensed Products in the Field in the Territory including regulatory filings and/or any information necessary or useful for regulatory filings, and (iv) CytRx has the right to provide to Vical.

1.5 The term "CytRx Poloxamer Intellectual Property" shall mean (i) Patent Rights; and (ii) CytRx Know-How.
1.6 The term "Field" shall mean the use of CytRx Poloxamer Intellectual Property in polynucleotide-based therapeutics and prophylactics (including DNA, RNA, viral, and all other biologically active natural and synthetic polynucleotides such as antisense (including antisense polynucleotides containing phosphothioester moieties) and CpG materials) alone or in combination with a protein or peptide antigen as part of a prime / boost regime, for all human and animal health applications, except for the following:
a) those fields of use currently licensed to Merck, as described in the Merck License,
b) DNA vaccines and / or therapeutics based on PSMA (as defined in
Section 1.17 hereof),
c) sale of a non-regulated product for use as a non-clinical research reagent to increase transfection in vitro or in laboratory animals. For the avoidance of any doubt, CytRx shall be free to license the CytRx Poloxamer Intellectual Property in therapeutics and prophylactics (including prime-boost regimes) that do not include polynucleotides.
1.7 The term "First Commercial Sale" shall mean, with respect to any Licensed Product, the first sale for end use or consumption of such Licensed Product in a country after all required approvals, including marketing and pricing approvals, have been granted by the governing health authority of such country.
1.8 The term "Improvement" shall mean any enhancement by CytRx in the synthesis or manufacture of TranzFect.
1.9 The term "Licensed Product(s)" shall mean preparations in final form (including all components used as part of a prime - boost regime) for sale by prescription, over-the-counter or any other method, for use in the Field, and which contain TranzFect.
1.10 The term "Major Pharmaceutical Markets" shall mean any of the United States, Canada, France, Germany, Italy, Spain, the United Kingdom or Japan.
1.11 The term "Net Sales" shall mean the gross invoice price of Licensed Product sold by Vical, its Affiliates or sublicensees (which term does not include distributors) to the first independent third party after deducting, if not previously deducted, in the amount invoiced or received:
(a) trade and quantity discounts;
(b) returns, rebates and allowances;
(c) chargebacks and other amounts paid on sale or dispensing of Licensed Product;
(d) retroactive price reductions that are actually allowed or granted;
(e) sales commissions paid to distributors and/or selling agents but not the actual sales force;
(f) a fixed amount equal to five percent (5%) of the gross invoice price to cover bad debt, sales or excise taxes, transportation and insurance charges and additional special transportation, custom duties, and other governmental charges;
(g) standard inventory cost of devices or delivery systems other than syringes used for dispensing or administering Licensed Product which accompany Licensed Product as it is sold.

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1.12     The term "Parties" shall mean CytRx, Vical, and all successors arising
         from merger, consolidation, changes in control, reorganization, or
         similar transaction.
1.13     The terms "Patent Rights" shall mean (i) all US and foreign patents and
         patent applications owned by or licensed to CytRx during the term of
         this Agreement which claim or cover polyoxypropylene/polyoxyethylene
         copolymer compounds or compositions or preparations of such compounds
         which may be added to a Substance to enhance the performance of such
         Substance or the manufacture, purification, formulation and use of such
         compounds and materials comprising such compounds; or (ii) divisions,
         continuations, continuations-in-part, reissues, renewals, extensions,
         supplementary protection certificates, utility models and the like of
         any such patents and patent applications and foreign equivalents
         thereof.
1.14     The term "Phase I Study", "Phase IIb Study", "Phase III Study", and
         Biologics or Product License Application (also referred to as a PLA)
         shall mean these terms as described in the laws and regulations of the
         U.S. Food and Drug Administration of the Department of Health and Human
         Services.
1.15     The term "PLA Approval" shall mean notification from a regulatory
         authority in a country that all approvals for the marketing of Licensed
         Product, including pricing approvals, have been granted.
1.16     The term "Proprietary Information" shall mean all Vical Know-How, CytRx
         Know-How, and all other scientific, clinical, regulatory, marketing,
         financial and commercial information or data, whether communicated in
         writing or orally or by sensory detection, which is provided by one
         party to the other party in connection with this Agreement.
1.17     The term "PSMA" shall mean any polypeptide derived from the
         prostate-specific membrane antigen which is a type II integral membrane
         glycoprotein that is highly expressed in prostate cancer.
1.18     The term "Substance" shall mean any polynucleotide-based therapeutic or
         prophylactic alone or in combination with a protein antigen as part of
         a prime / boost regime for use in the Field, wherein the Substance
         includes TranzFect.
1.19     The term "TranzFect" shall mean any polyoxypropylene/polyoxyethelene
         copolymer compound or compositions or preparations of such compounds
         claimed in or covered by CytRx Poloxamer Intellectual Property and/or
         CytRx Know-How which may be added to Substance to enhance performance
         of such Substance relative to use of the Substance without TranzFect.
1.20     The term "Territory" shall mean all of the countries in the world.
1.21     The term "Valid Patent Claim" shall mean a claim of an issued and
         unexpired patent included within the CytRx Poloxamer Intellectual
         Property, which has not been revoked or held unenforceable or invalid
         by a decision of a court or other governmental agency of competent
         jurisdiction, unappealable or unappealed within the time allowed for
         appeal, and which has not been disclaimed, denied or admitted to be
         invalid or unenforceable through reissue or disclaimer or otherwise.
1.22     The term "Vical Know-How" shall mean any Vical information and
         materials, including but not limited to, discoveries, improvements,
         processes, formulas, data, inventions, know-how and trade secrets,
         patentable or otherwise, which during the term of this Agreement are
         not generally known.

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ARTICLE II
LICENSE; DEVELOPMENT AND COMMERCIALIZATION

2.1      License Grant - CytRx Poloxamer Intellectual Property. CytRx hereby
         -----------------------------------------------------
         grants to Vical an exclusive license in the Territory with the right to
         sublicense under CytRx Poloxamer Intellectual Property to research,
         develop, make, have made, use, sell, offer to sell or import: (i)
         TranzFect as it relates to use with Substance in the Field; and (ii)
         Licensed Product(s).

2.2      [*****]

2.3      Exchange of Information
         -----------------------
         a. Initial Data Transfer. Within 10 days of the Effective Date, (the
         -------------------------
         "Data Transfer Period") CytRx agrees to transfer to Vical the CytRx
         Know-How listed in Addendum 3.0 hereof. During the 10 day Data Transfer
         Period, Vical, but not CytRx, shall have the option to terminate this
         Agreement at its sole discretion. If Vical exercises this option to
         terminate, Vical agrees to return to CytRx all copies of CytRx Know-How
         and destroy all documents containing any part thereof, and
         notwithstanding other terms in this Agreement, Vical further agrees to
         maintain CytRx Know-How in confidence and to treat such CytRx Know-How
         as proprietary information as described in Section 3.1 hereof. CytRx
         agrees that it will not enter into any third party discussions
         pertaining to the license of TranzFect in the Field during the Data
         Transfer Period.
         b. Additional Data Transfer. During the term of this Agreement and so
         ----------------------------
         long as Vical continues to have an obligation to pay royalties to
         CytRx under this Agreement, CytRx shall promptly disclose to Vical in
         English, and in writing on an ongoing basis all CytRx Know-How not
         previously disclosed.
         c. Reports. During the term of this Agreement, and upon written request
         ----------
         from CytRx, but not more than once per Calendar Year, Vical agrees to
         provide CytRx with a written report summarizing research and
         development activities related to the use of TranzFect in the Field
         over the previous Calendar Year.
         d. Sublicense Agreements. Vical shall provide to CytRx a copy of all
         -------------------------
         sublicense agreements pertaining to CytRx Intellectual Property within
         30 days of execution, with the financial terms redacted.
2.4      Development and Commercialization Vical shall use reasonable efforts,
         ---------------------------------
         at its own expense, to develop and commercialize a Licensed Product on
         a commercially reasonable basis in such countries in the Territory
         where in Vical's opinion it is commercially viable to do so.
2.5      Excused Performance. In addition to the provisions of Article VI
         --------------------
         hereof, the obligation of Vical with respect to any Licensed Product
         under Section 2.4 are expressly conditioned upon the continuing absence
         of any adverse condition or event relating to the safety or efficacy of
         the Licensed Product, and the obligation

[*****]  Confidential portions of this page have been redacted and filed
         separately with the Commission.

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of Vical to develop or market any such Licensed Product shall be delayed or suspended so long as in Vical's opinion any such condition or event exists.

ARTICLE III
CONFIDENTIALITY AND PUBLICATION

3.1 Nondisclosure Obligation. All Proprietary Information disclosed by one party to the other party hereunder shall be maintained in confidence by the receiving party and shall not be disclosed to a non-party or used for any purpose except as set forth herein without the prior written consent of the other party, except to the extent that such Proprietary Information:
(a) is known by recipient at the time of its receipt, and not through a prior disclosure by the disclosing party, as documented by business records;
(b) is properly in the public domain;
(c) is subsequently disclosed to a receiving party by a third party who may lawfully do so and is not under an obligation of confidentiality to the disclosing party;
(d) is developed by the receiving party independently of Proprietary Information received from the other party as documented by business records;
(e) is disclosed to governmental or other regulatory agencies in order to obtain patents or to gain approval to conduct clinical trials or to market Licensed Product, but such disclosure may be only to the extent reasonably necessary to obtain patents or authorizations;
(f) is deemed necessary or useful by Vical to be disclosed to sublicensees, agents, consultants, Affiliates and/or other third parties for the research and development, manufacturing and/or marketing of TranzFect, Substance, or Licensed Product (or for such parties to determine their interest in performing such activities) in accordance with this Agreement on the condition that such third parties agree to be bound by the confidentiality obligations contained this Agreement, provided the term of confidentiality for such third parties shall be no less than ten (10) years; or
(g) is required to be disclosed by law or court order, provided that notice is promptly delivered to the other party in order to provide an opportunity to challenge or limit the disclosure obligations.
3.2 CytRx Know-How. CytRx agrees to keep all CytRx Know-How confidential subject to exception (b), (e) and (g) in Section 3.1 above. In addition, CytRx may disclose CytRx Know-How to the extent such disclosure is deemed necessary or useful by CytRx to be disclosed to prospective and actual licensees, sublicensees, agents, consultants, Affiliates and/or other third parties for the research and development, manufacturing and/or marketing of
[products other than] the Licensed Products.

ARTICLE IV
PAYMENTS; ROYALTIES AND REPORTS

4.1 Consideration for License. In consideration for the license granted herein under the CytRx Poloxamer Intellectual Property upon the terms and conditions contained herein, Vical shall pay to CytRx the following:
          Upon completion of the Initial Data Transfer as described in Section
          2.2, Three million seven hundred fifty thousand dollars cash
          ($3,750,000) with such payment to be made by wire transfer to the
          following:
               [*****]

[*****]  Confidential portions of this page have been redacted and have filed
         separately with the Commission.

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If CytRx has not received confirmation of transfer of the full $3,750,000 by 5:00 PM E.S.T. on December 17, 2001, this license agreement will automatically terminate.
4.2 Milestone Payments. Vical shall pay CytRx the following milestone payments on Licensed Products for human health applications only.
(a) [*****] upon commencement of the first Phase I Study for each of the first and second Licensed Products
(b) [*****] upon commencement of the first Phase IIb Study or Phase III Study for each of the first and second Licensed Products
(c) [*****] upon filing of the first Biologics or Product License Application for each of the first and second Licensed Products
(d) [*****] upon approval of the first Biologics or Product License Application for each of the first and second Licensed Products
4.3 [*****]
4.4 Royalties. Subject to the terms and conditions of this Agreement, Vical shall pay CytRx the following royalties for each of the first two Licensed Products and / or bulk Substance (as set forth in Section 4.4.4) for human health applications. In the event one or both of the first two Licensed Products (or bulk Substance) are used in a prime - boost regime, and such regime includes both polynucleotide and protein vaccines incorporating TranzFect, royalties will be owed to CytRx on sales of the combined regime, however, the complete prime - boost regime would be counted as one Licensed Product (or bulk Substance) for the purposed of royalties owed to CytRx. In the event one or both of the first two Licensed Products (or bulk Substance) are used in a prime-boost regime, and TranzFect is not incorporated into all pharmaceutically active components of the regime, (a "Combination Product"), the Net Sales of the Licensed Product shall be determined by multiplying the Net Sales of the Combination Product by the fraction, A/A+B where A is the average sale price of the Licensed Product when sold separately in finished form and B is the average sale price of the other pharmaceutically active product(s) sold separately in finished form. In the event that such average sale price cannot be determined for both the Licensed Product and other pharmaceutically active product(s) in combination, Net Sales for purposes of determining payments shall be calculated by multiplying the Net Sales of the Combination Products by the fraction C/C+D where C is Vical's cost of goods of the Licensed Product and D is Vical's cost of goods of the other pharmaceutically active product(s) determined

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7

       in accordance with the method of accounting normally employed by Vical in
       computing cost of goods.
4.4.1  Royalties Payable By Vical.
       --------------------------
       (a)  For Net Sales by Vical, its Affiliates or sublicensees of Licensed
            Products which would, but for the license hereunder, infringe a
            Valid Patent Claim, royalties based on the following annual Net
            Sales aggregated separately for each Licensed Product:
                (a) For that portion of annual Net Sales up to two hundred fifty
                    million dollars ($250,000,000) a royalty of [*****];
                (b) For that portion of annual Net Sales exceeding two hundred
                    fifty million dollars ($250,000,000) but less than or equal
                    to five hundred million dollars ($500,000,000) a royalty of
                    [*****];
                (c) For that portion of annual Net Sales exceeding five hundred
                    million dollars ($500,000,000) a royalty of [*****].

       (b)  For Net Sales of Licensed Products by Vical, its Affiliates or
            sublicensees other than those covered in Subsection 4.4.1 (a) above,
            a royalty calculated as set forth in Section 4.4.1 (a), but only for
            a period of [*****] from First Commercial Sale of the respective
            Licensed Product in each country of the Territory.

       (c)  Royalties on each Licensed Product at the rate set forth above shall
            be effective as of the date of First Commercial Sale of a Licensed
            Product in a country and shall continue until either the longer of
            (i) the expiration of the last applicable patent on such Licensed
            Product in such country in the case of sales under Subsection
            4.4.1(a) above or (ii) until the [*****] anniversary of the First
            Commercial Sale in such country in the case of sales of Licensed
            Product under Subsection 4.4.1(b) above, subject to the following
            conditions:

            (x) that only one royalty shall be due with respect to the same unit
                of Licensed Product;
            (y) that no royalties shall be due upon the sale or other transfer
                among Vical, its Affiliates or sublicensees, but in such cases
                the royalty shall be due and calculated upon Vical's or its
                Affiliate's or its sublicensee's Net Sales to the first
                independent third party; and
            (z) no royalties shall accrue on the disposition of Licensed Product
                in reasonable quantities by Vical, its Affiliates or sublicenses
                as samples (promotion or otherwise) or as donations (for
                example, to non-profit institutions or government agencies for a
                non-commercial purpose).
4.4.2  Royalty Payable Under Managed Pharmaceutical Contract.  It is understood
       ------------------------------------------------------
       by the Parties that Vical may sell Licensed Product(s) to an independent
       third party (such as a retailer or wholesaler) and may subsequently
       perform services relating to Licensed Product(s) and other products under
       a managed pharmaceutical benefits contract or other similar contract. In
       such cases, it is agreed by the Parties that Net Sales shall be based on
       the invoice price to an independent retailer or wholesaler, provided that
       such invoice price represents a fair market price for such Licensed
       Products, notwithstanding that Vical may receive compensation arising
       from the performance of such services.

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4.4.3  Change in Sales Practices. The Parties acknowledge that during the term
       -------------------------
       of this Agreement, Vical's sales practices for the marketing and
       distribution of Licensed Product may change to the extent to which the
       calculation of the payment for royalties on Net Sales may become
       impractical or even impossible. In such event the Parties agree to meet
       and discuss in good faith new ways of compensating CytRx to the extent
       currently contemplated under Section 4.1

4.4.4. Royalties for Bulk Substance. In those cases where Vical sells bulk

       Substance rather than Licensed Product in packaged form to an independent
       third party, the royalty obligations of this Article IV shall be
       applicable to the bulk Substance, provided that such independent third
       party does not, directly or indirectly, sell such bulk Substance back to
       Vical.
4.4.5  Royalty Reduction. [*****]
       -----------------

4.4.6  Reports; Payment of Royalty. During the term of the Agreement following
       ---------------------------
       the First Commercial Sale of a Licensed Product, Vical shall furnish to
       CytRx a quarterly written report for the Calendar Quarter showing the
       sales of all Licensed Products subject to royalty payments sold by Vical,
       its Affiliates and its sublicensees in the Territory during the reporting
       period and the royalties payable under this Agreement. Reports shall be
       due on the sixtieth (60th) day following the close of each Calendar
       Quarter. Royalties shown to have accrued by each royalty report shall be
       due and payable on the date such royalty report is due. Vical shall keep
       complete and accurate records in sufficient detail to enable the
       royalties payable hereunder to be determined.

4.5    Audits.
       -------
       (a)   Upon the written request of CytRx and not more than once in each
             Calendar Year, Vical shall permit an independent certified public
             accounting firm of nationally recognized standing selected by CytRx
             and reasonably acceptable to Vical, at CytRx's expense, to have
             access during normal business hours to such of the records of Vical
             as may be reasonably necessary to verify the accuracy of the
             royalty reports hereunder for any year ending not more than
             twenty-four (24) months prior to the date of such request. The
             accounting firm shall disclose to CytRx only whether the royalty
             reports are correct or incorrect and the specific details
             concerning any discrepancies. No other information shall be
             provided to CytRx.
       (b)   If such accounting firm correctly concludes that additional
             royalties were owed during such period, Vical shall pay the
             additional royalties within thirty (30) days of the date CytRx
             delivers to Vical such accounting firm's

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9

written report so correctly concluding. The fees charged by such accounting firm shall be paid by CytRx. In the event the additional royalties owed by Vical for the period audited exceed [*****] of royalties due for said period and are at least one million dollars (U.S. $ 1,000,000) Vical will reimburse CytRx for the reasonable fees charged by the accounting firm.
(c) Vical shall include in each sublicense granted by it pursuant to this Agreement a provision requiring the sublicensee to make reports to Vical, to keep and maintain records of sales made pursuant to such sublicense and to grant access to such records by CytRx's independent accountant to the same extent required of Vical under this Agreement. Upon the expiration of twenty-four (24) months following the end of any Calendar Year, the calculation of royalties payable with respect to such year shall be binding and conclusive upon CytRx, and Vical and its sublicensees shall be released from any liability or accountability with respect to royalties for such Calendar Year.
(d) CytRx shall treat all financial information subject to review under this Section 4.5 or under any sublicense agreement in accordance with the confidentiality provisions of this Agreement, and shall cause its accounting firm to enter into an acceptable confidentiality agreement with Vical obligating it to retain all such financial information in confidence pursuant to such confidentiality agreement.

4.6 Payment Exchange Rate. All payments to be made by Vical to CytRx under this Agreement shall be made in United States dollars and may be paid by check made to the order of CytRx or bank wire transfer in immediately available funds to such bank account in the United States designated in writing by CytRx from time to time. In the case of sales outside the United States, the rate of exchange to be used in computing the amount of currency equivalent in United States dollars shall be made at the rate of exchange for the country in which such sales occurred as published in the Wall Street Journal on the last business day of the month in which such sales are recorded by Vical.
4.7 Income Tax Withholding. If laws, rules or regulations require withholding of income taxes or other taxes imposed upon payments set forth in this Article IV, Vical shall make such withholding payments as required and subtract such withholding payments from the payments set forth in this Article IV. Vical shall submit appropriate proof of payment of the withholding taxes to CytRx within a reasonable period of time.

ARTICLE V
REPRESENTATIONS AND WARRANTIES

5.1 Representation and Warranty. Except as disclosed to Vical prior to the date of this Agreement, CytRx represents and warrants to Vical that as of the date of this Agreement:
(a) to the best of CytRx's knowledge, the CytRx Poloxamer Intellectual Property is owned by or licensed to CytRx and is not invalid or unenforceable, in whole or in part;
(b) it has the full right, power and authority to enter into this Agreement, and to grant the licenses granted under Article II hereof;

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(c) it has not previously assigned, transferred, conveyed or otherwise encumbered its right, title and interest in CytRx Poloxamer Intellectual Property in the Field;

(d) to the best of CytRx's knowledge, it is the sole and exclusive owner or licensee of CytRx Poloxamer Intellectual Property in the Field, all of which is free and clear of any liens, charges and encumbrances, and no other person, corporate or other private entity, or governmental entity or subdivision thereof, has or shall have any claim of ownership with respect to the CytRx Poloxamer Intellectual Property in the Field, whatsoever;

(e) to the best of CytRx's knowledge, the licensed CytRx Poloxamer Intellectual Property and the research, development, manufacture, use, sale and/or import of TranzFect, do not interfere with or infringe any intellectual property rights owned or possessed by any third party;

(f) there are no claims, judgments or settlements against or owed by CytRx or pending or threatened claims or litigation relating to the CytRx Poloxamer Intellectual Property; and

(g) CytRx has disclosed to Vical all reasonably relevant information regarding the CytRx Poloxamer Intellectual Property licensed under this Agreement, including all patent opinions obtained by CytRx related thereto.

ARTICLE VI
PATENT PROVISIONS

6.1 Filing, Prosecution and Maintenance of Patents. CytRx agrees to file, prosecute and maintain in the Major Pharmaceutical Markets, upon appropriate consultation with Vical, the Patent Rights owned in whole or in part by CytRx and licensed to Vical under this Agreement. In addition, and to the extent legally available CytRx shall, at Vical's request, file, prosecute and maintain such Patent Rights in other countries, which costs shall be reimbursed by Vical within sixty (60) days of receipt of invoices thereof and shall be creditable toward any future royalty payments owed by Vical pursuant to Section 4.4 hereof. These terms shall include the additional patent rights requested and agreed to by Vical as described in the November 16, 2001 agreement between CytRx and Vical and shall be included in this Agreement as Addendum 4.0. CytRx shall keep Vical advised of the status of the actual and prospective patent filings and shall provide advance copies of any papers related to the filing, prosecution and maintenance of such patent filings. Vical shall have the right to review and propose recommendations regarding any submission to be made by CytRx in connection with the filing, prosecution, and maintenance of the Patent Rights, wherein CytRx agrees to consider such recommendations and not unreasonably decide not to implement same, and Vical agrees to bear any additional expenses or fees resulting therefrom. With respect to all filings hereunder in the Major Pharmaceutical Markets, CytRx shall be responsible for payment for all costs and expenses related to such filings.

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6.2 Option of Vical to Prosecute and Maintain Patents. CytRx shall give notice to Vical of any desire by CytRx and to the extent applicable Merck to cease prosecution and/or maintenance of Patent Rights and, in such case, shall permit Vical, at its sole discretion, to continue prosecution or maintenance at its own expense. If Vical elects to continue prosecution or maintenance or file based on Company's election not to file pursuant to
Section 6.1 above, CytRx shall execute such documents and perform such acts at CytRx's expense as may be reasonably necessary for Vical to perform such prosecution or maintenance or filing. All of the expenses and costs incurred by Vical to continue prosecution and maintenance of Patent Rights shall be fully creditable against royalties due under Article IV of this Agreement; provided however, no royalty payment when due, regardless of the number of such credits available to Vical in accordance with the terms of this Agreement, shall be reduced by more than fifty percent (50%). Unused credits may be carried over into subsequent royalty periods.

6.3. Interference, Opposition, Reexamination and Reissue.
(a) CytRx shall, within ten (10) days of learning of such event, inform Vical of any request for, or filing or declaration of any interference, opposition, or reexamination relating to Patent Rights. Vical and CytRx and to the extent applicable Merck shall thereafter consult and cooperate fully to determine a course of action with respect to any such proceeding. To the extent applicable to the Field and the rights licensed hereunder, Vical shall have the right to review and approve any submission to be made in connection with such proceeding.
(b) CytRx shall not institute any reexamination, or reissue proceeding relating to Patent Rights without the prior written consent to Vical, which consent shall not be unreasonably withheld.
(c) In connection with any interference, opposition, reissue, or reexamination proceeding relating to Patent Rights, Vical and CytRx will cooperate fully and will provide each other with any information or assistance that either may reasonably request. CytRx shall keep Vical informed of developments in any such action or proceeding, including, to the extent permissible, the status of any settlement negotiations and the terms of any offer related thereto.
(d) So long as Vical continues to have an obligation to pay royalties under this Agreement, CytRx shall bear the expense of any interference, opposition, reexamination, or reissue proceeding relating to Patent Rights. Otherwise, such expenses shall be borne by Vical.

6.4 Enforcement and Defense Rights. Subject to the Merck License and the rights granted to Merck and the obligations of CytRx thereunder, CytRx agrees as follows:

(a) CytRx shall give Vical notice of either (i) any infringement of Patent Rights, or (ii) any misappropriation or misuse of CytRx Know-How, that may come to CytRx's attention. Vical and CytRx shall thereafter consult and cooperate fully to determine a course of action, including but not limited to the commencement of legal action by either or any combination of Vical, Merck, and CytRx, to terminate any infringement of Patent Rights or any misappropriation or misuse of CytRx Know-How. However, CytRx, and / or Merck upon notice by CytRx to Vical, shall have the first right to initiate and prosecute such legal action at CytRx's and / or Merck's own expense and in the name of CytRx and, if necessary, Merck and / or Vical, or to control the

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defense of any declaratory judgment action relating to Patent Rights or CytRx Know-How. CytRx shall promptly inform Vical if both CytRx and Merck elect not to exercise such first right and Vical shall thereafter have the right to either initiate and prosecute such action or to control the defense of such declaratory judgment action in the name of Vical and, if necessary, CytRx.

(b) In the event that both CytRx and Merck elect not to initiate and prosecute an action as provided in paragraph (a), and Vical elects to do so, the costs of any course of action to terminate infringement of Patent Rights or misappropriation or misuse of CytRx Know-How, including the costs of any legal action commenced or the defense of any declaratory judgment, shall be shared equally by CytRx and Vical.

(c) For any action to terminate any infringement of Patent Rights or any misappropriation or misuse of CytRx Know-How, in the event that Vical is unable to initiate or prosecute such action solely in its own name, CytRx will join such action voluntarily and will execute and cause its Affiliates to execute all documents necessary for Vical to initiate litigation to prosecute and maintain such action. In connection with any action, Vical and CytRx will cooperate fully and will provide each other with any information or assistance that either may reasonably request. Each party shall keep the other informed of developments in any action or proceeding, including, to the extent permissible by law, the status of any settlement negotiations and the terms of any offer related thereto.

(d) Any recovery obtained by either or any combination of Vical, Merck, and CytRx in connection with or as a result of any action contemplated by this section, whether by settlement or otherwise, shall be shared in order as follows:
i) the party which initiated and prosecuted the action shall recoup all of its costs and expenses incurred in connection with the action;

ii) the other party or parties shall then, to the extent possible, recover its costs and expenses incurred in connection with the action; and the amount of any recovery remaining shall then be allocated between the parties on a pro rata basis under which CytRx shall receive a proportion based on the royalties it lost and Vical and to the extent applicable Merck shall receive any remaining amounts.

(e) CytRx shall immediately give notice to Vical of any certification regarding any Patent Rights it has received pursuant to the United States "Drug Price Competition and Patent Term Restoration Act of 1984" under either 21 U.S.C. ss.ss.355(b)(2)(A)(iv) or
(j)(2)(A)(vii)(IV) or equivalent foreign provision and shall provide Vical with a copy of such certification within (5) days of receipt. CytRx's and Vical's rights with respect to the initiation and prosecution of any legal action as a result of such certification or any recovery obtained as a result of such legal action shall be defined in paragraphs (a)-(d) hereof, provided, however, if both CytRx and Merck decide not to bring infringement proceedings against the entity making such a certification, CytRx shall give notice to Vical of such decision not to bring suit within thirty (30) days after receipt of notice of such certification. Vical may then, but is not required to, bring suit against the party that filed the certification. Any such suit by Vical, Merck, or CytRx shall either be in the name of Vical, in the name of Merck, or in the name of CytRx, or jointly by any combination of Vical, Merck and

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CytRx. For this purpose, the party not bringing suit shall execute such legal papers necessary for the prosecution of such suit as may be reasonably requested by the party bringing suit.

6.5 Abandonment. CytRx shall promptly give notice to Vical of the grant, lapse, revocation, surrender, invalidation or abandonment of any Patent Rights licensed to Vical for which CytRx is responsible for the filing, prosecution and maintenance.

6.6 Patent Term Restoration. The ability in this Agreement to obtain patent term restoration or supplemental protection certificates is subject to the Merck License, Merck's election and availability or eligibility for the patent in question for patent term restoration or supplemental protection certificates for the Licensed Product in question. The Parties hereto shall cooperate with each other in obtaining patent term restoration or supplemental protection certificates or their equivalents in any country in the Territory where applicable to Patent Rights. Vical shall have the opportunity to make any election with respect to obtaining such patent term restoration to the extent possible and shall bear the cost thereof which shall be fully creditable toward any future royalty payments owed by Vical pursuant to Section 4.4 hereof.

6.7 Patent Marking. Vical agrees to mark the Licensed Products and Substances sold in the United States with all applicable United States patent numbers. All Licensed Products and Substances shipped to or sold in other countries shall be marked in such a manner as to conform with the patent laws and practice of the country of manufacture or sale.

6.8 [*****]

ARTICLE VII
TERM AND TERMINATION

7.1 Term and Expiration. This Agreement shall be effective as of the Effective Date and unless terminated earlier pursuant to Sections 2.2, 4.1, 7.2 or 7.3 below, the term of this Agreement shall continue in effect until expiration of all royalty obligations hereunder. Upon expiration of all royalty obligations hereunder,

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          Vical's licenses pursuant to Article II shall become fully paid-up,
          perpetual licenses and CytRx's obligation to provide Improvements
          shall cease.

7.2       Termination by Vical. Notwithstanding anything contained herein to the
          --------------------
          contrary, Vical shall have the right to terminate this Agreement at
          any time in its sole discretion by giving ninety (90) days advance
          written notice to CytRx unless terminated pursuant to Section 2.2. In
          the event of such termination under this Section 7.2, the rights and
          obligations hereunder, including any licenses and any payment
          obligations not due and owing as of the termination date shall
          terminate.

7.3       Termination.
          -----------

7.3.1     Termination for Cause. This Agreement may be terminated by notice by
          ---------------------
          either party at any time during the term of this Agreement:

    (a)   if the other party is in breach of its material obligations hereunder
          by causes and reasons within its control and has not cured such breach
          within ninety (90) days after notice requesting cure of the breach
          provided, however, in the event of a good faith dispute with respect
          to the existence of a material breach, the ninety (90) day cure period
          shall be tolled until such time as the dispute is resolved pursuant to
          Section 8.6 hereof; or

    (b)   upon the filing or institution of bankruptcy, reorganization,
          liquidation, or receivership proceedings, or upon a general assignment
          of a substantial portion of all of its assets for the benefit of
          creditors, by the other party; provided, however, in the case of any
                                         --------  -------
          involuntary bankruptcy proceeding such right to terminate shall only
          become effective if the party consents to the involuntary bankruptcy
          or such proceeding is not dismissed within ninety (90) days after the
          filing thereof.

7.3.2     Effect of Termination for Cause on License.
          -------------------------------------------

          (a)  In the event that Vical terminates this Agreement under Section
               7.3.1(a), CytRx's obligation to provide Improvements shall cease
               and Vical's license pursuant to Section 2.1 shall become paid-up,
               perpetual license, except that Vical shall make [*****] of the
               royalty payments set forth in Section 4.4 in such event. In the
               event that CytRx terminates this Agreement under Section
               7.3.1(a), or Vical terminates this Agreement under Section 7.2,
               Vical's licenses pursuant to Section 2.1 shall terminate as of
               such termination date.

          (b)  In the event this Agreement is terminated due to the rejection of
               this Agreement by or on behalf of CytRx under Section 365 of the
               United States Bankruptcy Code (the "Code"), all licenses and
               rights to licenses granted under or pursuant to this Agreement by
               CytRx to Vical are, and shall otherwise be deemed to be, for
               purposes of Section 365(n) of the Code, licenses of rights to
               "intellectual property" as defined under Section 101(35A) of the
               Code. In such a case, the rights of the parties shall be
               determined by the Code.

7.4       Effect of Termination. Expiration or termination of the Agreement
          ---------------------
          shall not relieve the Parties of any obligation accruing prior to such
          expiration or termination, and the provisions of Article III shall
          survive the expiration of the Agreement and shall continue in effect
          for five (5) years. Any expiration or early termination of this
          Agreement shall be without prejudice to the rights of either party
          against the other accrued or accruing under this Agreement prior to
          termination, including the obligation to pay royalties for Licensed
          Product(s) or Substance(s) sold prior to such termination.
          Notwithstanding the foregoing, any remedies set forth under this
          Article VII shall not limit any claim for damages

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either party may have against the other arising from material breach of the other party.

ARTICLE VIII
MISCELLANEOUS

8.1. Force Majeure. Neither party shall be held liable or responsible to the other party nor be deemed to have defaulted under or breached the Agreement for failure or delay in fulfilling or performing any term of the Agreement when such failure or delay is caused by or results from causes beyond the reasonable control of the affected party including, but not limited to, fire, floods, embargoes, war, acts of war (whether war be declared or not), insurrections, riots, civil commotions, strikes, lockouts or other labor disturbances, acts of God or acts, omissions or delays in acting by any governmental authority or the other party. The affected party shall notify the other party of such force majeure circumstances as soon as reasonably practical.

8.2. Assignment. The Agreement may not be assigned or otherwise transferred, nor, except as expressly provided hereunder, may any right or obligations hereunder be assigned or transferred, by either party without the consent of the other party; provided, however, that Vical may, without such consent, assign the Agreement and its rights and obligations hereunder to an Affiliate or in connection with the transfer or sale of all or substantially all of its assets related to the Licensed Product or the business, or in the event of its merger or consolidation or change in control or similar transaction. Any permitted assignee shall assume all obligations of its assignor under the Agreement. An assignment by Vical permitted by this Section 8.2 shall not relieve Vical of any of its obligations set forth in this Agreement.

8.3. Severability. In the event any one or more of the provisions contained in this Agreement should be held 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, unless the absence of the invalidated provision(s) adversely affect the substantive rights of the Parties. The Parties shall in such an instance use their best efforts to replace the invalid, illegal or unenforceable provision(s) with valid, legal and enforceable provision(s) which, insofar as practical, implement the purposes of this Agreement.

8.4. Notices. All notices or other communications which are required or permitted hereunder shall be in writing and sufficient if delivered personally, sent by telecopier (and promptly confirmed by personal delivery, registered or certified mail or overnight courier), sent by nationally-recognized overnight courier or sent by registered or certified mail, postage prepaid, return receipt requested, addressed as follows:

if to CytRx, to:      CytRx Corporation
                      154 Technology Parkway
                      Technology Park/Atlanta
                      Norcross, GA 30092
                      Attention:
                      President & CEO
                      Telecopier No. (770) 448-3357

if to Vical, to:      Vical Incorporated
                      9373 Towne Centre Drive

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                      Suite 100
                      San Diego, CA  92121-3088
                      Attention:
                      President & CEO
                      Telecopier No. (858) 646-1150

or to such other address as the party to whom notice is to be given may have furnished to the other party in writing in accordance herewith. Any such communication shall be deemed to have been given when delivered if personally delivered or sent by telecopier on a business day, on the business day after dispatch if sent by nationally-recognized overnight courier and on the third business day following the date of mailing if sent by mail.

8.5 Applicable Law. The Agreement shall be governed by and construed in accordance with the laws of the State of California and the United States of America without reference to any rules of conflict of laws.

8.6. Dispute Resolution. The Parties shall negotiate in good faith and use reasonable efforts to settle any dispute, controversy or claim arising from or related to this Agreement or the breach thereof. If the Parties do not fully settle, and a party wishes to pursue the matter, each such dispute, controversy or claim that is not an "Excluded Claim" shall be finally resolved by binding arbitration in accordance with the Commercial Arbitration Rules and Supplementary Procedures for Large Complex Disputes of the American Arbitration Association ("AAA"), and judgment on the arbitration award may be entered in any court having jurisdiction thereof. The arbitration shall be conducted by a panel of three persons experienced in the pharmaceutical business. Within 30 days after initiation of arbitration, each party shall select one person to act as arbitrator and the two party-selected arbitrators shall select a third arbitrator within 30 days of their appointment. If the arbitrators selected by the Parties are unable or fail to agree upon the third arbitrator, the third arbitrator shall be appointed by the AAA. The place of arbitration shall be San Diego, California. Either party may apply to the arbitrators for interim injunctive relief until the arbitration award is rendered or the controversy is otherwise resolved. Either party also may, without waiving any remedy under this Agreement, seek from any court having jurisdiction any injunctive or provisional relief necessary to protect the rights or property of that party pending the arbitration award. The arbitrators shall have no authority to award punitive or any other type of damages not measured by a party's compensatory damages. Each party shall bear its own costs and expenses and attorneys' fees and an equal share of the arbitrators' and any administrative fees of arbitration. Except to the extent necessary to confirm an award or as may be required by law, neither a party nor an arbitrator may disclose the existence, content, or results of an arbitration without the prior written consent of both Parties. In no event shall an arbitration be initiated after the date when commencement of a legal or equitable proceeding based on the dispute, controversy or claim would be barred by the applicable California statute of limitations. As used in this Section, the term "Excluded Claim" shall mean a dispute, controversy or claim that concerns (a) the validity or infringement of a patent, trademark or copyright; or
(b) any antitrust, anti-monopoly or competition law or regulation, whether or not statutory.

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8.7. Entire Agreement. The Agreement contains the entire understanding of the Parties with respect to the subject matter hereof. All express or implied agreements and understandings, either oral or written, heretofore made are expressly merged in and made a part of the Agreement. The Agreement may be amended, or any term hereof modified, only by a written instrument duly executed by both Parties hereto.

8.8. Headings. The captions to the several Articles and Sections hereof are not a part of the Agreement, but are merely guides or labels to assist in locating and reading the several Articles and Sections hereof.

8.9. Independent Contractors. It is expressly agreed that CytRx and Vical shall be independent contractors and that the relationship between the two Parties shall not constitute a partnership, joint venture or agency. Neither CytRx nor Vical shall have the authority to make any statements, representations or commitments of any kind, or to take any action, which shall be binding on the other, without the prior consent of the other party.

8.10. Waiver. The waiver by either party hereto of any right hereunder or the failure to perform or of a breach by the other party shall not be deemed a waiver of any other right hereunder or of any other breach or failure by said other party whether of a similar nature or otherwise.

8.11. Counterparts. The 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.

8.12. Waiver of Rule of Construction. Each party has had the opportunity to consult with counsel in connection with the review, drafting and negotiation of this Agreement. Accordingly, the rule of construction that any ambiguity in this Agreement shall be construed against the drafting party shall not apply.

8.13. Anouncements; Public Disclosure. Except as otherwise provided herein or as required by law, neither party shall originate any publication, news release or other public announcement, written or oral, whether in the public press, or stockholders' reports (if applicable) or otherwise, directly relating to the financial terms of this Agreement, without the prior written approval of the other party, which approval shall not be unreasonably withheld. In addition, there shall be no public announcement of this agreement by either party until $3.75 million is received by CytRx. Each party shall issue an initial press release each of which contain the text as presented in Addendum 5.0 and Addendum 6.0 hereof.

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IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first set forth above.

Vical Incorporated                            CytRx Corporation

BY: /s/ Vijay B. Samant                       BY: /s/ Jack Luchese
    ---------------------                         ---------------------
    Vijay B. Samant                               Jack Luchese
TITLE:  President and CEO                     TITLE:  President and CEO

DATE: December 6, 2001                        DATE: December 6, 2001

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SCHEDULE 1.0.0
ROYALTY REDUCTION

[*****]

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