Document:

EXHIBIT 10.86
                                                                   -------------

                               SECURITY AGREEMENT
                               ------------------

         THIS SECURITY AGREEMENT ("Agreement") is made as of the 29th day of
November 1999, by and between GENERIC DISTRIBUTORS, INCORPORATED, a Delaware
corporation ("Guarantor"), and FINOVA MEZZANINE CAPITAL INC., Tennessee
corporation formerly known as SIRROM CAPITAL CORPORATION, for itself and in its
capacity as Collateral Agent pursuant to that Collateral Agent Agreement dated
June 18, 1997, (the "Agency Agreement") by and between FMC and Argosy Investment
Partners, L.P., a Pennsylvania limited partnership ("Argosy") (FMC and Argosy
are collectively referred to herein as "Creditor").

                                    RECITALS:
                                    --------

         WHEREAS, FMC and Argosy have extended credit to DynaGen, Inc., a
Delaware corporation ("Parent"), and Guarantor has guaranteed the obligations of
Parent pursuant to a Guaranty Agreement of even date herewith executed by
Guarantor (the "Guaranty"); and

         WHEREAS, in connection with the amendment of the Loan, FMC desires to
obtain from Guarantor and Guarantor desires to grant to FMC a security interest
in certain collateral more particularly described below.

                                   AGREEMENT:
                                    ---------

         NOW, THEREFORE, in consideration of the foregoing premises and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

1.       Grant of Security Interest. Guarantor hereby grants to FMC, as agent
         for itself and Argosy, a security interest in the following described
         property (collectively, the "Collateral"):

             (a) presently existing and hereafter arising accounts, contract
         rights, and all other forms of obligations owing to Guarantor arising
         out of the sale or lease of goods or the rendition of services by
         Guarantor, whether or not earned by performance, and any and all credit
         insurance, guaranties, and other security therefor, as well as all
         merchandise returned to or reclaimed by Guarantor and Guarantor's Books
         relating to any of the foregoing (collectively, "Accounts");

             (b) present and future general intangibles and other personal
         property (including choses or things in action, goodwill, patents,
         trade names, trademarks, servicemarks, copyrights, blueprints,
         drawings, purchase orders, customer lists, monies due or recoverable
         from pension funds, route lists, monies due under any royalty or
         licensing agreements, infringement claims, computer programs, computer
         discs, computer tapes, literature, reports, catalogs deposit accounts,
         insurance premium rebates, tax refunds, and tax refund claims) other
         than goods and Accounts, and Guarantor's Books relating to any of the
         foregoing (collectively, "General Intangibles");

             (c) present and future letters of credit, notes, drafts,
         instruments, certificated and uncertificated securities, documents,
         leases, and chattel paper, and Guarantor's Books relating to any of the
         foregoing (collectively, "Negotiable Collateral");
<PAGE>

             (d) present and future inventory in which Guarantor has any
         interest, including goods held for sale or lease or to be furnished
         under a contract of service and all of Guarantor's present and future
         raw materials, work in process, finished goods, and packing and
         shipping materials, wherever located, and any documents of title
         representing any of the above, and Guarantor's Books relating to any of
         the foregoing (collectively, "Inventory");

             (e) present and hereafter acquired machinery, machine tools,
         motors, equipment, furniture, furnishings, fixtures, vehicles
         (including motor vehicles and trailers), tools, parts, dies, jigs,
         goods (other than consumer goods or farm products), and any interest in
         any of the foregoing, and all attachments, accessories, accessions,
         replacements, substitutions, additions, and improvements to any of the
         foregoing, wherever located (collectively, "Equipment");

             (f) books and records including: ledgers; records indicating,
         summarizing, or evidencing Guarantor's assets or liabilities, or the
         collateral; all information relating to Guarantor's business operations
         or financial condition; and all computer programs, disc or tape files,
         printouts, funds or other computer prepared information, and the
         equipment containing such information (collectively, "Guarantor's
         Books");

             (g) substitutions, replacements, additions, accessions, proceeds,
         products to or of any of the foregoing, including, but not limited to,
         proceeds of insurance covering any of the foregoing, or any portion
         thereof, and any and all Accounts, General Intangibles, Negotiables,
         Collateral, Inventory, Equipment, money, deposits, accounts, or other
         tangible or intangible property resulting from the sale or other
         disposition of the accounts, general Intangibles, Negotiable
         Collateral, Inventory, Equipment, or any portion thereof or interest
         therein and the proceeds thereof.

2.       Secured Indebtedness. The security interest granted hereby shall secure
         the payment of the Obligations (as defined in the Guaranty) and the
         prompt performance of each of the covenants and duties under the Loan
         Documents (as defined in the "Loan Agreement," as defined in the
         Guaranty).

3.       Representations and Warranties of Guarantor. Guarantor represents,
         warrants and agrees as follows:

             (a) Except as set forth on Schedule 3(a) hereto (the "Permitted
             Encumbrances"), Guarantor is the owner of the Collateral free and
             clear of any liens and security interests. Guarantor will defend
             the Collateral against the claims and demands of all persons other
             than the holders of the Permitted Encumbrances.

             (b) The address set forth on Schedule 3(b) hereto is Guarantor's
             principal places of business and the location(s) of all tangible
             Collateral and the place(s) where the records concerning all
             intangible Collateral are kept and/or maintained.

             (c) Guarantor will pay all costs of filing of financing,
             continuation and termination statements with respect to the
             security interests created hereby, and FMC is authorized to do all
             things that it deems necessary to perfect and continue perfection
             of the security interests created hereby and to protect the
             Collateral.

4.       Agreements With Respect to the Collateral. Guarantor covenants and
         agrees with FMC as follows:
<PAGE>

             (a) Guarantor will not permit any of the Collateral to be removed
             from the location specified herein, except for temporary periods in
             the normal and customary use thereof, without the prior written
             consent of FMC.

             (b) Guarantor shall notify FMC in writing of any change in the
             location of Guarantor's principal place of business (or residence)
             or the location of any tangible Collateral or the place(s) where
             the records concerning all intangible Collateral are kept or
             maintaine

             (c) Guarantor will keep the Collateral in good condition and repair
             and will pay and discharge all taxes, levies and other impositions
             levied thereon as well as the cost of repairs to or maintenance of
             same, and will not permit anything to be done that may impair the
             value of any of the Collateral. If Guarantor fails to pay such
             sums, FMC may do so for Guarantor's account and add the amount
             thereof to the Obligations.

             (d) Until the occurrence of an Event of Default, Guarantor shall be
             entitled to possession of the Collateral and to use the same in any
             lawful manner, provided that such use does not cause excessive wear
             and tear to the Collateral, cause it to decline in value at an
             excessive rate, or violate the terms of any policy of insurance
             thereon.

             (e) Guarantor will not sell, exchange, lease or otherwise dispose
             of any of the Collateral or any interest therein without the prior
             written consent of FMC. Notwithstanding the foregoing, so long as
             an Event of Default has not occurred, Guarantor shall have the
             right to process and sell Guarantor's inventory in the regular
             course of business. FMC's security interest hereunder shall attach
             to all proceeds of all sales or other dispositions of the
             Collateral. If at any time any such proceeds shall be represented
             by any instruments, chattel paper or documents of title, then such
             instruments, chattel paper or documents of title shall be promptly
             delivered to FMC and subject to the security interest granted
             hereby. If at any time any of Guarantor's inventory is represented
             by any document of title, such document of title will be delivered
             promptly to FMC and subject to the security interest granted
             hereby.

             (f) Guarantor will not allow the Collateral to be attached to real
             estate in such manner as to become a fixture or a part of any real
             estate.

             (g) Guarantor will at all times keep the Collateral insured against
             all insurable hazards in amounts equal to the full cash value of
             the Collateral. Such insurance shall be in such companies as may be
             acceptable to FMC, with provisions satisfactory to FMC for payment
             of all losses thereunder to FMC as its interests may appear. If
             required by FMC, Guarantor shall deposit the policies with FMC
             unless the possession of such policy is required by a senior
             lender, in which case Guarantor shall deposit the policy with the
             senior lender. If an Event of Default (as defined in the Loan
             Agreement) has occurred and is continuing, any money received by
             FMC under said policies may be applied to the payment of the
             Obligations, whether or not due and payable, or at FMC's option may
             be delivered by FMC to Guarantor for the purpose of repairing or
             restoring the Collateral. Guarantor assigns to FMC all right to
             receive proceeds of insurance not exceeding the amounts secured
             hereby, directs any insurer to pay all proceeds directly to FMC,
             and appoints FMC Guarantor's attorney-in-fact to endorse any draft
             or check made payable to Guarantor in order to collect the benefits
             of such insurance. If Guarantor fails to keep the Collateral
             insured as
<PAGE>

             required by FMC, FMC shall have the right to obtain such insurance
             at Guarantor's expense and add the cost thereof to the Obligations.

             (h) Guarantor will not permit any liens or security interests other
             than those created by this Agreement and the Permitted Encumbrances
             to attach to any of the Collateral, nor permit any of the
             Collateral to be levied upon under any legal process, nor permit
             anything to be done that may impair the security intended to be
             afforded by this Agreement, nor permit any tangible Collateral to
             become attached to or commingled with other goods without the prior
             written consent of FMC.

5.       Remedies Upon Default. Upon an Event of Default under and as defined in
         the Loan Agreement, FMC may pursue any or all of the following
         remedies, without any notice to Guarantor except as required below:

             (a) FMC may give written notice of default to Guarantor, following
             which Guarantor shall not dispose of, conceal, transfer, sell or
             encumber any of the Collateral (including, but not limited to, cash
             proceeds) without FMC's prior written consent, even if such
             disposition is otherwise permitted hereunder in the ordinary course
             of business. Any such disposition, concealment, transfer or sale
             after the giving of such notice shall constitute a wrongful
             conversion of the Collateral. FMC may obtain a temporary
             restraining order or other equitable relief to enforce Guarantor's
             obligation to refrain from so impairing FMC's Collateral.

             (b) FMC may take possession of any or all of the Collateral.
             Guarantor hereby consents to FMC's entry into any of Guarantor's
             premises to repossess Collateral, and specifically consents to
             FMC's forcible entry thereto as long as FMC causes no significant
             damage to the Premises in the process of entry (frilling of locks,
             cutting of chains and the like do not in themselves cause
             "significant" damage for the purposes hereof) and provided that FMC
             accomplishes such entry without a breach of the peace.

             (c) FMC may dispose of the Collateral at private or public sale.
             Any required notice of sale shall be deemed commercially reasonable
             if given at least five (5) days prior to sale. FMC may adjourn any
             public or private sale to a different time or place without notice
             or publication of such adjournment, and may adjourn any sale either
             before or after offers are received. The Collateral may be sold in
             such lots as FMC may elect, in its sole discretion. FMC may take
             such action as it may deem necessary to repair, protect, or
             maintain the Collateral pending its disposition.

             (d) FMC may recover any or all proceeds of accounts from any bank
             or other custodian who may have possession thereof. Guarantor
             hereby authorizes and directs all custodians of Guarantor's assets
             to comply with any demand for payment made by FMC pursuant to this
             Agreement, without the need of confirmation from Guarantor and
             without making any inquiry as to the existence of an Event of
             Default or any other matter. FMC may engage a collection agent to
             collect accounts for a reasonable percentage commission or for any
             other reasonable compensation arrangement.

             (e) FMC may notify any or all account debtors that subsequent
             payments must be made directly to FMC or its designated agent. Such
             notice may be made over FMC's signature or over Guarantor's name
             with no signature or both, in FMC's discretion. Guarantor hereby
             authorizes and directs all existing or future account debtors to
             comply with any such notice given by FMC, without the need of
             confirmation from Guarantor and without making any inquiry as to
             the existence of an Event of Default or as to any other matter.
<PAGE>

             (f) FMC may, but shall not be obligated to, take such measures as
             FMC may deem necessary in order to collect any or all of the
             accounts. Without limiting the foregoing, FMC may institute any
             administrative or judicial action that it may deem necessary in the
             course of collecting and enforcing any or all of the accounts. Any
             administrative or judicial action or other action taken by FMC in
             the course of collecting the accounts may be taken by FMC in its
             own name or in Guarantor's name. FMC may compromise any disputed
             claims and may otherwise enter into settlements with account
             debtors or obligors under the accounts, which compromises or
             settlements shall be binding upon Guarantor. FMC shall have no duty
             to pursue collection of any account, and may abandon efforts to
             collect any account after such efforts are initiated.

             (g) FMC may, with respect to any account involving uncompleted
             performance by Guarantor, and with respect to any general
             intangible or other Collateral whose value may be preserved by
             additional performance on Guarantor's part, take such action as FMC
             may deem appropriate including, but not limited, to performing or
             causing the performance of any obligation of Guarantor thereunder,
             the making of payments to prevent defaults thereunder, and the
             granting of adequate assurances to other parties thereto with
             respect to future performance. FMC's action with respect to any
             such accounts or general intangibles shall not render FMC liable
             for further performance thereunder unless FMC so agrees in writing.

             (h) FMC may exercise its lien upon and right of setoff against any
             monies, items, credits, deposits or instruments that FMC may have
             in its possession and that belong to Guarantor or to any other
             person or entity liable for the payment of any or all of the
             Obligations.

             (i) FMC may exercise any right that it may have under any other
             document evidencing or securing the Obligations or otherwise
             available to FMC at law or equity.

6.       Audits and Examinations. FMC shall have the right, at any time, by its
         own auditors, accountants or other agents, to examine or audit any of
         the books and records of Guarantor, or the Collateral, all of which
         will be made available upon request. Such accountants or other
         representatives of FMC will be permitted to make any verification of
         the existence of the Collateral or accuracy of the records that FMC
         deems necessary or proper. Any reasonable expenses incurred by FMC in
         making such examination, inspection, verification or audit shall be
         paid by Guarantor promptly on demand and shall constitute part of the
         Obligations.

7.       Termination Statement. Upon receipt of proper written demand following
         the payment in full of the Obligations and termination of any
         commitment of FMC to make any future advances to Guarantor, FMC at its
         option, shall send a termination statement with respect to any
         financing statement filed to perfect Creditor's security interests in
         any of the Collateral to Guarantor, or cause such termination statement
         to be filed with the appropriate filing officer(s).
<PAGE>

8.       Power of Attorney. Guarantor hereby constitutes FMC or its designee, as
         Guarantor's attorney-in-fact with power, upon the occurrence and during
         the continuance of an Event of Default, to endorse Guarantor's name
         upon any notes, acceptances, checks, drafts, money orders, or other
         evidences of payment or Collateral that may come into either its or
         FMC's possession; to sign the name of Guarantor on any invoice or bill
         of lading relating to any of the accounts receivable, drafts against
         customers, assignments and verifications of accounts receivable and
         notices to customers; to send verifications of accounts receivable; to
         notify the Post Office authorities to change the address for delivery
         of mail addressed to Guarantor to such address as FMC may designate; to
         execute any of the documents referred to in Section 3(c) hereof in
         order to perfect and/or maintain the security interests and liens
         granted herein by Guarantor to FMC; to do all other acts and things
         necessary to carry out the purposes of and remedies provided under this
         Agreement. All acts of said attorney or designee are hereby ratified
         and approved, and said attorney or designee shall not be liable for any
         acts of commission or omission (other than acts of gross negligence or
         willful misconduct), nor for any error of judgment or mistake of fact
         or law. This power being coupled with an interest is irrevocable until
         all of the Obligations are paid in full and any and all promissory
         notes executed in connection therewith are terminated and satisfied.

9.       Binding Effect. This Agreement shall inure to the benefit of FMC's
         successors and assigns and shall bind Guarantor's heirs,
         representatives, successors and assigns.

10.      Severability. If any provision of this Agreement is held invalid, such
         invalidity shall not affect the validity or enforceability of the
         remaining provisions of this Agreement.

11.      Governing Law and Amendments. This Agreement shall be construed and
         enforced under the laws of the State of Tennessee applicable to
         contracts to be wholly performed in such State. No amendment or
         modification hereof shall be effective except in a writing executed by
         each of the parties hereto.

12.      Survival of Representations and Warranties. All representations and
         warranties contained herein or made by or furnished on behalf of
         Guarantor in connection herewith shall survive the execution and
         delivery of this Agreement.

13.      Counterparts. This Agreement may be executed in any number of
         counterparts and by different parties to this Agreement in separate
         counterparts, each of which when so executed shall be deemed to be an
         original and all of which taken together shall constitute one and the
         same Agreement.

14.      Construction and Interpretation. Should any provision of this Agreement
         require judicial interpretation, the parties hereto agree that the
         court interpreting or construing the same shall not apply a presumption
         that the terms hereof shall be more strictly construed against one
         party by reason of the rule of construction that a document is to be
         more strictly construed against the party that itself or through its
         agent prepared the same; it being agreed that Guarantor, FMC and their
         respective agents have participated in the preparation hereof.

15.      Consent to Jurisdiction; Exclusive Venue. Guarantor hereby irrevocably
         consents to the Jurisdiction of the United States District Court for
         the Middle District of Tennessee and of all Tennessee state courts
         sitting in Davidson County, Tennessee, for the purpose of any
         litigation to which FMC may be a party and which concerns this
         Agreement or the Obligations. It is further agreed that venue for any
         such action shall lie exclusively with courts sitting in Davidson
         County, Tennessee, unless FMC agrees to the contrary in writing.
<PAGE>

16.      Waiver of Trial by Jury. CREDITOR AND GUARANTOR HEREBY KNOWINGLY AND
         VOLUNTARILY WITH THE BENEFIT OF COUNSEL WAIVE TRIAL BY JURY IN ANY
         ACTIONS, PROCEEDINGS, CLAIMS OR COUNTER-CLAIMS, WHETHER IN CONTRACT OR
         TORT OR OTHERWISE, AT LAW OR IN EQUITY, ARISING OUT OF OR IN ANY WAY
         RELATING TO THIS AGREEMENT OR THE LOAN DOCUMENTS.

<PAGE>

         IN WITNESS WHEREOF, Guarantor and FMC have executed this Agreement, or
have caused this Agreement to be executed as of the date first above written.

                                        GUARANTOR:
                                        ----------

                                        GENERIC DISTRIBUTORS, INCORPORATED,
                                        a Delaware corporation

                                        By: /s/ Dhnanjay Wadekar
                                            ---------------------------
                                        Title: Secretary

                                        AGENT:
                                        ------

                                        FINOVA MEZZANINE CAPITAL INC.,
                                        a Tennessee corporation

                                        By: /s/ Tim McCarthy
                                            ------------------------
                                        Title: Vice PresidentEXHIBIT 10.87
                                                                   -------------

NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF
THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AND NEITHER
THIS WARRANT NOR SUCH SHARES MAY BE SOLD, ENCUMBERED OR OTHERWISE TRANSFERRED
EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR AN
EXEMPTION FROM SUCH REGISTRATION REQUIREMENT, AND, IF AN EXEMPTION SHALL BE
APPLICABLE, THE HOLDER SHALL HAVE DELIVERED AN OPINION OF COUNSEL ACCEPTABLE TO
THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

Void after 5:00 p.m. Eastern Standard Time, on June 1, 2001.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                                  DYNAGEN, INC.

FOR VALUE RECEIVED, DYNAGEN, INC., a Delaware corporation (the "Company"),
hereby certifies that Project Capital Partners, LLC, or its permitted assigns,
is entitled to purchase from the Company, at any time or from time to time
commencing on June 1, 1999 and prior to 5:00 P.M., Eastern Standard Time, on
June 1, 2001, a total of __________ fully paid and nonassessable shares of the
common stock, par value $.01 per share, of the Company for an aggregate purchase
price of $0.___ per share. (Hereinafter, (i) said common stock, together with
any other equity securities which may be issued by the Company with respect
thereto or in substitution therefor, is referred to as the "Common Stock," (ii)
the shares of the Common Stock purchasable hereunder are referred to as the
"Warrant Shares," (iii) the aggregate purchase price payable hereunder for the
Warrant Shares is referred to as the "Aggregate Warrant Price," (iv) the price
payable hereunder for each of the Warrant Shares is referred to as the "Exercise
Price," (v) this Warrant, and all warrants hereafter issued in exchange or
substitution for this Warrant are referred to as the "Warrant" and (vi) the
holder of this Warrant is referred to as the "Holder.") The Exercise Price is
subject to adjustment as hereinafter provided.

         1.  Exercise of Warrant

         (a) Exercise. This Warrant may be exercised, in whole at any time or in
part from time to time, commencing on June 1, 1999 and prior to 5:00 P.M.,
Eastern Standard Time on June 1, 2001, by the Holder of this Warrant by the
surrender of this Warrant (with the subscription form at the end hereof duly
executed) at the address set forth in Section 7(a) hereof, together with proper
payment of the Aggregate Warrant Price, or the proportionate part thereof if
this Warrant is exercised in part. Payment for Warrant Shares shall be made by
certified or official bank check payable to the order of the Company. If this
Warrant is exercised in part, the Holder is entitled to receive a new Warrant
covering the number of Warrant Shares in respect of which this Warrant has not
been exercised and setting forth the proportionate part of the Aggregate Warrant
Price applicable to such Warrant Shares. Upon such surrender of this Warrant,
the Company will (a) issue a certificate or certificates in the name of the
Holder for the largest number of whole shares of the Common Stock to which the
Holder shall be entitled if this Warrant is exercised in whole and (b) deliver
the proportionate part thereof if this Warrant is exercised in part, pursuant to
the provisions of the Warrant. In lieu of any fractional share of the Common
Stock which would otherwise be issuable in respect to the exercise of the
Warrant, the Company at its option may (a) pay in cash an amount equal to the
product of (i) the daily mean average of the closing price of a share of Common
Stock on the ten consecutive trading days before the conversion date and (ii)
such fraction of a share or (b) issue an additional share of Common Stock.

         Upon exercise of the Warrant, the Company shall issue and deliver to
the Holder certificates for the Common Stock issuable upon such exercise within
ten business days after such exercise and the person exercising shall be deemed
to be the holder of record of the Common Stock issuable upon such exercise.
<PAGE>

         No warrant granted herein shall be exercisable after 5:00 p.m. Eastern
Standard Time on the second anniversary of the date of issuance.

         (b) Net Issuance. Notwithstanding anything to the contrary contained in
Section 1(a) hereof, in the case of any exercise on or prior to June 1, 2001 the
Holder may elect to exercise this Warrant in whole or in part by receiving
shares of Common Stock equal to the net issuance value (as determined below) of
this Warrant, or any part hereof, upon surrender of this Warrant at the
principal office of the Company together with notice of such election (with the
form at the end hereof duly executed), in which event the Company shall issue to
the Holder a number of shares of Common Stock computed using the following
formula:

                  X = Y (A-B)
                      -------
                         A

         Where:   X = the number of shares of Common Stock to be issued to the
                      Holder

                  Y = the number of shares of Common Stock as to which this
                      Warrant is to be exercised

                  A = the daily mean average of the closing price of a share of
                      Common Stock on the ten consecutive trading days before
                      the conversion date

                  B = the Exercise Price

         (c) Certain Adjustments

         The Exercise Price and the number of Warrant Shares shall be equitably
adjusted from time to time to account for stock splits, stock dividends,
combinations, recapitalizations, reclassifications and similar events.

         2. Reservation of Warrant Shares. The Company agrees that, prior to the
expiration of this Warrant, the Company will at all times have authorized and
reserved, and will keep available, solely for issuance or delivery upon the
exercise of this Warrant, the number of shares of the Common Stock as from time
to time shall be issuable upon the exercise of this Warrant.

         3. Fully Paid Stock: Taxes. The Company agrees that the shares of the
Common Stock represented by each and every certificate for Warrant Shares
delivered on the exercise of this Warrant shall, at the time of such delivery,
be validly issued and outstanding, fully paid and nonassessable, and not subject
to preemptive rights, and the Company will take all such actions as may be
necessary to assure that the par value or stated value, if any, per share of the
Common Stock is at all times equal to or less than the then Exercise Price. The
Company further covenants and agrees that it will pay, when due and payable, any
and all Federal and state stamp, original issue or similar taxes that may be
payable in respect of the issue of any Warrant Share or certificate therefor.

         4.  Transfer

             (a) Securities Laws. Neither this Warrant nor the Warrant Shares
issuable upon the exercise hereof have been registered under the Securities Act
of 1933, as amended (the "Securities Act"), or under any state securities laws
and unless so registered may not be transferred, sold, pledged, hypothecated or
otherwise disposed of ("Transferred") unless an exemption from such registration
is available or if the Warrant or the Warrant Shares are sold in accordance with
Rule 144 promulgated under the Securities Act. In the event Holder desires to
transfer this Warrant or any of the Warrant Shares issued, the Holder must give
the Company prior written notice of such proposed transfer including the name
and address of the proposed transferee. Such transfer may be made only either
(i) upon publication by the Securities and Exchange Commission (the
"Commission") of a ruling, interpretation, opinion or "no action letter" based
upon facts presented to said Commission, or (ii) upon receipt by the Company of
an opinion of counsel to the Company in either case to the effect that the
proposed transfer will not violate the provisions of the Securities Act, the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), or the rules
<PAGE>

and regulations promulgated under either such act, or to the effect that the
Warrant or Warrant Shares to be sold or transferred have been registered under
the Securities Act and that there is in effect a registration statement in which
is included a prospectus meeting the requirements of Section 10(a) of the
Securities Act, which is being or will be delivered to the purchaser or
transferee at or prior to the time of delivery of the certificates evidencing
the Warrant or Warrant Shares to be sold or transferred.

             (b) Conditions to Transfer. Prior to any such proposed transfer,
and as a condition thereto, if such transfer is not made pursuant to an
effective registration statement under the Securities Act, the Holder will, if
requested by the Company, deliver to the Company (i) an investment covenant
signed by the proposed transferee, (ii) an agreement by such transferee to the
impression of the restrictive investment legend set forth herein on the
certificate or certificates representing the securities acquired by such
transferee, (iii) an agreement by such transferee that the Company may place a
"stop transfer order" with its transfer agent or registrar, and (iv) an
agreement by the transferee to indemnify the Company to the same extent as set
forth in the next succeeding paragraph.

             (c) Indemnity. The Holder acknowledges that the Holder understands
the meaning and legal consequences of this Section 4, and the Holder hereby
agrees to indemnify and hold harmless the Company, its representatives and each
officer and director thereof from and against any and all loss, damage or
liability (including all attorneys' fees and costs incurred in enforcing this
indemnity provision) due to or arising out of (a) the inaccuracy of any
representation or the breach of any warranty of the Holder contained in, or any
other breach of, this warrant, (b) any transfer of the Warrant or any of the
Warrant Shares in violation of the Securities Act, the Exchange Act or the rules
and regulations promulgated under either of such acts, (c) any transfer of the
Warrant or any of the Warrant Shares not in accordance with this Warrant or (d)
any untrue statement or omission to state any material fact in connection with
the investment representations or with respect to the facts and representations
supplied by the Holder to counsel to the Company upon which its opinion as to a
proposed transfer shall have been based.

             (d) Transfer. Except as restricted hereby, this Warrant and the
Warrant Shares issued may be transferred by the Holder in whole or in part at
any time or from time to time. Upon surrender of this Warrant to the Company or,
if the Company so instructs the Holder in writing, at the office of its stock
transfer agent, if any, with assignment documentation duly executed and funds
sufficient to pay any transfer tax, and upon compliance with the foregoing
provisions, the Company shall, without charge, execute and deliver a new Warrant
in the name of the assignee named in such instrument of assignment, and this
Warrant shall promptly be canceled. Any attempted assignment, transfer, pledge,
hypothecation or other disposition of this Warrant in any way contrary to the
provisions of this Warrant, or any levy of execution, attachment or other
process attempted upon the Warrant, shall be null and void and without effect.

             (e) Legend and Stop Transfer Orders. Unless the Warrant Shares have
been registered under the Securities Act, upon exercise of any part of the
Warrant and the issuance of any of the Warrant Shares, the Company shall
instruct its transfer agent to enter stop transfer orders with respect to such
shares, and all certificates representing Warrant Shares shall bear on the face
thereof substantially the following legend, insofar as is consistent with
applicable law:

       "The shares of common stock represented by this certificate have not
       been registered under the Securities Act of 1933, as amended, and may
       not be sold, offered for sale, assigned, transferred or otherwise
       disposed of unless registered pursuant to the provisions of that Act or
       an opinion of counsel to the Company is obtained stating that such
       disposition is in compliance with an available exemption from such
       registration."

         5. Loss, etc. of Warrant. Upon receipt of evidence satisfactory to the
Company of the loss, theft, destruction or mutilation of this Warrant, and of an
unsecured indemnity from the Holder reasonably satisfactory to the Company, if
lost, stolen or destroyed, and upon surrender and cancellation of the Warrant,
if mutilated, the Company shall execute and deliver to the Holder a new Warrant
of like date, tenor and denomination.

         6. Warrant Holder Not Shareholder. Except as otherwise provided herein,
this Warrant does not confer upon the Holder any right to vote or to consent to
or receive notice as a shareholder of the Company, as such, in respect of any
matters whatsoever, or any other rights or liabilities as a shareholder, prior
to the exercise hereof.
<PAGE>

         7. Communication. No notice or other communication under this Warrant
shall be effective unless the same is in writing and is mailed by certified
mail, return receipt requested, overnight delivery service, or sent by
facsimile, addressed to:

             (a) the Company at 840 Memorial Drive, Cambridge, Massachusetts
02139, or such other address as the Company has designated in writing to the
Holder, with a copy to David A. Broadwin, Esq., Foley, Hoag & Eliot LLP, One
Post Office Square, Boston, Massachusetts 02109, or

             (b) the Holder at 50 Federal Street, Boston, MA 02109, or such
other address as the Holder has designated in writing to the Company.

         Any notice given hereunder shall be effective upon the earlier of (i)
receipt, or (ii) a date three days from the date of mailing or, if sent by
facsimile, upon confirmation of transmission.

         8. Headings. The headings of this Warrant have been inserted as a
matter of convenience and shall not affect the construction hereof.

         9. Applicable Law. This Warrant shall be governed by and construed in
accordance with the law of The Commonwealth of Massachusetts without giving
effect to the principles of conflicts of law thereof.

         IN WITNESS WHEREOF, DYNAGEN, INC. has caused this Warrant to be signed
by its Executive Vice President and its corporate seal to be hereunto affixed
and attested by its Secretary this ____ day of _________, 1999.

ATTEST:                                     DYNAGEN, INC.

:                                           By:
 ----------------------                         -------------------------
                                                Dhananjay Wadekar
                                                Executive Vice President

<PAGE>
                                  SUBSCRIPTION

         The undersigned, _______________________________________, pursuant to
the provisions of the foregoing Warrant, hereby agrees to subscribe for the
purchase of ________ shares of the Common Stock of DYNAGEN, INC. covered by said
Warrant, and makes payment therefor in full at the price per share provided by
said Warrant.

Dated:____________________________  Signature:_________________________________

Address:___________________________

                                   ASSIGNMENT

         FOR VALUE RECEIVED ___________________________ hereby sells, assigns
and transfers unto ______________________________ the foregoing Warrant and all
rights evidenced thereby, and does irrevocably constitute and appoint
_____________________, attorney, to transfer said Warrant on the books of
DYNAGEN, INC..

Dated:____________________________  Signature:_________________________________

Address:__________________________

                               PARTIAL ASSIGNMENT

FOR VALUE RECEIVED _________________________ hereby sells, assigns and transfers
unto ___________________________ the right to purchase _________ shares of the
Common Stock of DYNAGEN, INC. by the foregoing Warrant, and a proportionate part
of said Warrant and the rights evidenced hereby, and does irrevocably constitute
and appoint _________________________, attorney, to transfer that part of said
Warrant on the books of DYNAGEN, INC.

Dated:____________________________  Signature:_________________________________

Address:__________________________

                              NET ISSUANCE ELECTION

         The undersigned, _______________________________, pursuant to the
provisions of the foregoing Warrant, hereby tenders the right to purchase _____
shares of the Common Stock of DYNAGEN, INC., and a proportionate part of said
Warrant and the rights evidenced thereby, in exchange for a number of shares of
said Common Stock to be computed in accordance with the provisions of Section
1(b) of said Warrant.

Dated:____________________________  Signature:_________________________________

Address:__________________________

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