Document:

EXHIBIT 4.1
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                        CONTINGENT STOCK PURCHASE WARRANT
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         This CONTINGENT STOCK PURCHASE WARRANT ("Warrant") is issued as of the
____ day of February, 2001 by DYNAGEN, INC., a Delaware corporation (the
"Company"), to FINOVA MEZZANINE CAPITAL INC. ("FINOVA"), a Tennessee corporation
(FINOVA and any subsequent assignee or transferee hereof are hereinafter
referred to collectively as "Holder" or "Holders").

                                   AGREEMENT:

         1. ISSUANCE OF WARRANT; TERM. For and in consideration of FINOVA
MEZZANINE CAPITAL INC. permitting the assumption of an existing loan to the
Company and in consideration of the other settlements and agreements evidenced
by that First Amended and Restated Loan Agreement of even date herewith among
the Company, RXBAZAAR.COM, INC., a Delaware corporation; SUPERIOR PHARMACEUTICAL
COMPANY, an Ohio corporation; ARGOSY INVESTMENT PARTNERS, L.P., a Pennsylvania
limited partnership formerly known as Odyssey Investment Partners, L.P.; and
FINOVA, a Tennessee corporation formerly known as SIRROM Capital Corporation, in
its individual capacity and as Collateral Agent (as now existing and as may
hereafter be amended, the "Loan Agreement"), and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Company hereby grants to Holder the right to Purchase One Million Six Hundred
Sixty Six Thousand Six Hundred Sixty Seven (1,666,667) shares (the "Base
Amount") of the Company's common stock (the "Common Stock"). The shares of
Common Stock issuable upon exercise of this Warrant are hereinafter referred to
as the "Shares." NOTWITHSTANDING ANY OTHER PROVISION HEREOF, THIS WARRANT SHALL
NOT BE EXERCISABLE UNTIL JUNE 17, 2002, AND SHALL THEN AND THEREAFTER BE
EXERCISABLE IF, AND ONLY IF, AS OF JUNE 17, 2002, THE "OBLIGATIONS" (AS DEFINED
IN THE LOAN AGREEMENT) REMAIN UNPAID IN ANY AMOUNT. IF THE OBLIGATIONS ARE PAID
IN FULL PRIOR TO JUNE 17, 2002 THIS WARRANT SHALL TERMINATE AND BE OF NO FURTHER
EFFECT. The Company warrants and represents that it has formally reserved for
issuance pursuant hereto the number of its common shares necessary to perform
under this Warrant and that the number of shares shall be increased in the
future if necessary to give effect to the antidilution provisions hereof.

         2. EXERCISE PRICE. The exercise price (the "Exercise Price") per share
for which all or any of the Shares may be purchased pursuant to the terms of
this Warrant shall be One Cent ($.01).

         3. EXERCISE. This Warrant may be exercised by the Holder hereof (but
only on the conditions hereinafter set forth) in whole or in part, upon delivery
of written notice of intent to exercise to the Company in the manner at the
address of the Company set forth in Section 13 hereof, together with this
Warrant and payment to the Company of the aggregate Exercise Price of the Shares
so purchased. The Exercise Price shall be payable, at the option of the Holder,
(a) by certified or bank check, (b) by the surrender of that Secured Promissory
Note of this date made by the Company payable to Holder in the original
principal amount of $500,000 (the "Note") or portion thereof having an
outstanding principal balance equal to the aggregate Exercise Price or
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(c) by the surrender of a portion of this Warrant where the Shares subject to
the portion of this Warrant that is surrendered have a fair market value equal
to the aggregate Exercise Price. In the absence of an established public market
for the Common Stock, fair market value shall be established by the Company's
board of directors in a commercially reasonable manner. Upon exercise of this
Warrant as aforesaid, the Company shall as promptly as practicable, and in any
event within fifteen (15) days thereafter, execute and deliver to the Holder of
this Warrant a certificate or certificates for the total number of whole Shares
for which this Warrant is being exercised in such names and denominations as are
requested by such Holder. If this Warrant shall be exercised with respect to
less than all of the Shares, the Holder shall be entitled to receive a new
Warrant covering the number of Shares in respect of which this Warrant shall not
have been exercised, which new Warrant shall in all other respects be identical
to this Warrant. The Company covenants and agrees that it will pay when due any
and all state and federal issue taxes which may be payable in respect of the
issuance of this Warrant or the issuance of any Shares upon exercise of this
Warrant.

         4. COVENANTS AND CONDITIONS. The above provisions are subject to the
following:

                  (a) Neither this Warrant nor the Shares have been registered
         under the Securities Act of 1933, as amended (the "Securities Act"), or
         any state securities laws ("Blue Sky Laws"). This Warrant has been
         acquired for investment purposes and not with a view to distribution or
         resale and may not be sold or otherwise transferred without (i) an
         effective registration statement for such Warrant under the Securities
         Act and such applicable Blue Sky Laws, or (ii) an opinion of counsel,
         which opinion and counsel shall be reasonably satisfactory to the
         Company and its counsel, that registration is not required under the
         Securities Act or under any applicable Blue Sky Laws (the Company
         hereby acknowledges that Boult, Cummings, Conners & Berry PLC is
         acceptable counsel). Transfer of the Shares shall be restricted in the
         same manner and to the same extent as the Warrant and the certificates
         representing such Shares shall bear substantially the following legend:

                  THE SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE
                  HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), OR ANY APPLICABLE STATE SECURITIES LAW
                  AND MAY NOT BE TRANSFERRED UNTIL (I) A REGISTRATION STATEMENT
                  UNDER THE ACT AND SUCH APPLICABLE STATE SECURITIES LAWS SHALL
                  HAVE BECOME EFFECTIVE WITH REGARD THERETO, OR (II) IN THE
                  OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY, REGISTRATION
                  UNDER SUCH SECURITIES ACTS AND SUCH APPLICABLE STATE
                  SECURITIES LAWS IS NOT REQUIRED IN CONNECTION WITH SUCH
                  PROPOSED TRANSFER.

         The Holder hereof and the Company agree to execute such other documents
         and instruments as counsel for the Company reasonably deems necessary
         to effect the compliance of the issuance of this Warrant and any shares
         of Common Stock issued upon exercise hereof with applicable federal and
         state securities laws.

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                  (b) The Company covenants and agrees that all Shares which may
         be issued upon exercise of this Warrant will, upon issuance and payment
         therefor, be legally and validly issued and outstanding, fully paid and
         nonassessable, free from all taxes, liens, charges and preemptive
         rights, if any, with respect thereto or to the issuance thereof. The
         Company shall at all times reserve and keep available for issuance upon
         the exercise of this Warrant such number of authorized but unissued
         shares of Common Stock as will be sufficient to permit the exercise in
         full of this Warrant.

         5. TRANSFER OF WARRANT. Subject to the provisions of Section 4 hereof,
this Warrant may be transferred, in whole or in part, to any person or business
entity, by presentation of the Warrant to the Company with written instructions
for such transfer. Upon such presentation for transfer, the Company shall
promptly execute and deliver a new Warrant or Warrants in the form hereof in the
name of the assignee or assignees and in the denominations specified in such
instructions. The Company shall pay all expenses incurred by it in connection
with the preparation, issuance and delivery of Warrants under this Section.

         6. WARRANT HOLDER NOT SHAREHOLDER; RIGHTS OFFERING; PREEMPTIVE RIGHTS.
Except as otherwise provided herein, this Warrant does not confer upon the
Holder, as such, any right whatsoever as a shareholder of the Company.
Notwithstanding the foregoing, if the Company should offer to all of the
Company's shareholders the right to purchase any securities of the Company, then
all shares of Common Stock that are subject to this Warrant shall be deemed to
be outstanding and owned by the Holder and the Holder shall be entitled to
participate in such rights offering.

         7. OBSERVATION RIGHTS. The Holder of this Warrant shall receive notice
of and be entitled to attend or may send a representative to attend all meetings
of the Company's Board of Directors in a non-voting observation capacity and
shall receive a copy of all correspondence and information delivered to the
Company's Board of Directors, from the date hereof until such time as the
indebtedness evidenced by the Note and by that Unconditional Guaranty of this
date executed by the Company in favor of Holder have been paid in full.

         8. ADJUSTMENT UPON ISSUANCES OR CHANGES IN CAPITAL STOCK.

                  (a) In the case of any stock split, stock dividend,
         recapitalization, combination of shares of the Company, or other
         similar event (each a "Recapitalization Event") occurring after the
         date hereof, then the Holder exercising this Warrant shall receive, for
         the aggregate Exercise Price, the aggregate number and class of shares
         which such Holder would have been entitled to receive if immediately
         prior to such Recapitalization Event this Warrant had been exercised.

                  (b) In the case of any merger, consolidation, exchange of
         shares, separation, reorganization or liquidation of the Company, or
         other similar event (each a "Reorganization Event") occurring after the
         date hereof, as a result of which shares of Common Stock shall be
         changed into the same or a different number of shares of the same or
         another class or classes of securities of the Company or another
         entity, or the holders of Common Stock are entitled to receive cash or
         other property, then the Holder exercising this Warrant shall receive,
         for the aggregate Exercise Price, the aggregate number and class of

                                      -3-
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         shares, cash or other property which such Holder would have received if
         this Warrant had been exercised immediately prior to such
         Reorganization Event.

                  (c) If any adjustment pursuant to this Section 8 would create
         a fractional share of Common Stock (or other security) or a right to
         acquire a fractional share of Common Stock (or other security), such
         fractional share shall be disregarded and the number of shares subject
         to this Warrant shall be the next higher number of shares, rounding all
         fractions upward.

                  (d) Whenever there shall be (i) an issuance of securities by
         the Company (whether or not requiring an adjustment pursuant to Section
         8(a)) or (ii) a record date or closing date set for a Recapitalization
         Event, Reorganization Event or similar event or (iii) an adjustment
         pursuant to this Section 8, the Company shall immediately notify the
         Holder(s) of this Warrant in writing of such issuance or adjustment,
         setting forth in reasonable detail the event requiring the notice and
         the method by which an adjustment, if any, was calculated.

         9. INTENTIONALLY LEFT BLANK.

         10. REGISTRATION.

                  (a) The Company and the Holder of the Warrant and the Shares
         agree that if at any time after the date hereof the Company shall
         propose to file a registration statement with respect to any of its
         Common Stock on a form suitable for inclusion of the Shares a secondary
         offering (including its initial public offering), and to the extent
         that it is not prohibited contractually under agreements in effect as
         of the date hereof from including the Shares therein, it will give
         notice in writing to such effect to the Holder(s) at least thirty (30)
         days prior to such filing or as soon thereafter as is practicable, and,
         at the written request of any such registered holder, made within ten
         (10) days after the receipt of such notice, will include therein at the
         Company's cost and expense, but excluding underwriting discounts,
         commissions and filing fees attributable to the Shares included
         therein) such of the Shares as such Holder(s) shall request; provided,
         however, that if the offering being registered by the Company is
         underwritten and if the representative of the underwriters certifies in
         writing that the inclusion therein of the Shares would materially and
         adversely affect the sale of the securities to be sold by the Company
         thereunder, then the Company shall be required to include in the
         offering only that number of securities, including the Shares, which
         the underwriters determine in their sole discretion will not jeopardize
         the success of the offering. The Company may terminate or withdraw any
         registration statement initiated by it and described in this Section
         10(a), provided, that if a Holder of Shares has made a request under
         this Section 10(a), the Company may do so only if the Board of
         Directors has reasonably determined that proceeding with the
         registration statement would not be in the best interests of the
         Company.

                  (b) Whenever the Company undertakes to effect the registration
         of any of the Shares, the Company shall, as expeditiously as reasonably
         possible:

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                           (i) Prepare and file with the Securities and Exchange
                  Commission (the "Commission") a registration statement
                  covering such Shares and use its best efforts to cause such
                  registration statement to be declared effective by the
                  Commission as expeditiously as possible and to keep such
                  registration effective until the earlier of (A) the date when
                  all Shares covered by the registration statement have been
                  sold or (B) one hundred eighty (180) days from the effective
                  date of the registration statement; provided, that before
                  filing a registration statement or prospectus or any amendment
                  or supplements thereto, the Company will furnish to each
                  Holder of Shares covered by such registration statement,
                  copies of all such documents proposed to be filed (excluding
                  exhibits, unless any such person shall specifically request
                  exhibits), which documents will be subject to the review of
                  such Holders and underwriters, and the Company will not file
                  such registration statement or any amendment thereto or any
                  prospectus or any supplement thereto (including any documents
                  incorporated by reference therein) with the Commission if
                  information in such registration statement or prospectus
                  concerning a particular selling Holder has changed and such
                  Holder or the underwriters, if any, shall reasonably object.

                           (ii) Prepare and file with the Commission such
                  amendments and post-effective amendments to such registration
                  statement as may be necessary to keep such registration
                  statement effective during the period referred to in Section
                  10(b)(i) and to comply with the provisions of the Securities
                  Act with respect to the disposition of all securities covered
                  by such registration statement, and cause the prospectus to be
                  supplemented by any required prospectus supplement, and as so
                  supplemented to be filed with the Commission pursuant to Rule
                  424 under the Securities Act.

                           (iii) Furnish to the selling Holder(s) such numbers
                  of copies of such registration statement, each amendment
                  thereto, the prospectus included in such registration
                  statement (including each preliminary prospectus), each
                  supplement thereto and such other documents as they may
                  reasonably request in order to facilitate the disposition of
                  the Shares owned by them.

                           (iv) Use its best efforts to register and qualify
                  under such other securities laws of such jurisdictions as
                  shall be reasonably requested by any selling Holder and do any
                  and all other acts and things which may be reasonably
                  necessary or advisable to enable such selling Holder to
                  consummate the disposition of the Shares owned by such Holder,
                  in such jurisdictions; provided, however, that the Company
                  shall not be required in connection therewith or as a
                  condition thereto to qualify to transact business or to file a
                  general consent to service of process in any such states or
                  jurisdictions.

                           (v) Promptly notify each selling Holder of the
                  happening of any event as a result of which the prospectus
                  included in such registration statement contains an untrue
                  statement of a material fact or omits any fact necessary to
                  make the statements therein not misleading and, at the request
                  of any such Holder, the Company will prepare a supplement or
                  amendment to such prospectus so that, as

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                  thereafter delivered to the purchasers of such Shares, such
                  prospectus will not contain an untrue statement of a material
                  fact or omit to state any fact necessary to make the
                  statements therein not misleading.

                           (vi) Provide a transfer agent and registrar for all
                  such Shares not later than the effective date of such
                  registration statement.

                           (vii) Enter into such customary agreements (including
                  underwriting agreements in customary form for a primary
                  offering) and take all such other actions as the underwriters,
                  if any, reasonably request in order to expedite or facilitate
                  the disposition of such Shares (including, without limitation,
                  effecting a stock split or a combination of shares).

                           (viii) Promptly notify the selling Holder(s) of the
                  following events and (if requested by any such person) confirm
                  such notification in writing: (A) the filing of the prospectus
                  or any prospectus supplement and the registration statement
                  and any amendment or post-effective amendment thereto and,
                  with respect to the registration statement or any
                  post-effective amendment thereto, the declaration of the
                  effectiveness of such documents, (B) any requests by the
                  Commission for amendments or supplements to the registration
                  statement or the prospectus or for additional information, (C)
                  the issuance or threat of issuance by the Commission of any
                  stop order suspending the effectiveness of the registration
                  statement or the initiation of any proceedings for that
                  purpose and (D) the receipt by the Company of any notification
                  with respect to the suspension of the qualification of the
                  Shares for sale in any jurisdiction or the initiation or
                  threat of initiation of any proceeding for such purposes.

                           (ix) Use commercially reasonable efforts to prevent
                  the entry of any order suspending the effectiveness of the
                  registration statement and obtain at the earliest possible
                  moment the withdrawal of any such order, if entered.

                           (x) Cooperate with the selling Holder(s) to
                  facilitate the timely preparation and delivery of certificates
                  representing the Shares to be sold and not bearing any
                  restrictive legends, and, upon receipt of satisfactory
                  confirmation on behalf of the Holder of the sale of such
                  Shares pursuant to the registration statement and in
                  accordance with the plan of distribution described therein.

                           (xi) Provide a CUSIP number for all the Shares not
                  later than the effective date of the registration statement.

                           (xii) Otherwise use its best efforts to comply with
                  all applicable rules and regulations of the Commission, and
                  make generally available to its security holders earnings
                  statements satisfying the provisions of Section 11(a) of the
                  Securities Act, no later than forty-five (45) days after the
                  end of any twelve-month period (or ninety (90) days, if such
                  period is a fiscal year) (A) commencing at the end of any
                  fiscal quarter in which the Shares are sold to underwriters in
                  a firm or best efforts underwritten offering, or (B) if not
                  sold to underwriters in such an offering,

                                      -6-
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                  beginning with the first month of the first fiscal quarter of
                  the Company commencing after the effective date of the
                  registration statement, which statements shall cover such
                  twelve-month periods.

                  (c) After the date hereof, the Company shall not grant to any
         holder of securities of the Company any registration rights which have
         a priority greater than or equal to those granted to Holders pursuant
         to this Warrant without the prior written consent of the Holder(s).

                  (d) The Company's obligations under Section 10(a) above with
         respect to each Holder of Shares are expressly conditioned upon such
         Holder's furnishing to the Company in writing such information
         concerning such holder and the terms of such holder's proposed offering
         as the Company shall reasonably request for inclusion in the
         registration statement.

                  (e) For purposes of this Section 10, all of the Shares shall
         be deemed to be issued and outstanding.

                  (f) In connection with any registration or qualification of
         securities under this Section 10, the Company agrees to indemnify the
         Holder hereof and the holders of any shares of Common Stock issuable
         upon the exercise hereof and each underwriter thereof, including each
         person, if any, who controls the holder or such stockholder or
         underwriter within the meaning of Section 15 of the Securities Act,
         against all losses, claims, damages, liabilities and expenses
         (including reasonable costs of investigation and the costs, fees and
         expenses of legal counsel) caused by any untrue, or alleged untrue,
         statement of a material fact contained in any registration statement,
         preliminary prospectus, prospectus or notification or offering circular
         (as amended or supplemented if the Company shall have furnished any
         amendments or supplements thereto) or caused by any omission, or
         alleged omission, to state therein a material fact required to be
         stated therein or necessary to make the statements therein not
         misleading, except insofar as such losses, claims, damages, liabilities
         or expenses are caused by any untrue statement or alleged untrue
         statement or omission or alleged omission based upon information
         furnished in writing to the Company by the holder or any such
         stockholder or underwriter expressly for use therein. The Company and
         each officer, director and controlling person of the Company shall be
         indemnified respectively by the Holder of this Warrant and by the
         holders of any Shares for all such losses, claims, damages, liabilities
         and expenses (including the costs of reasonable investigation and the
         costs, fees and expenses of legal counsel) caused by any such untrue,
         or alleged untrue, statement or any such omission or alleged omission,
         based upon information furnished in writing to the Company by the
         Holder hereof or any such stockholder expressly for use therein,
         provided that the liability of each Holder hereof or any such
         stockholder shall be limited to the dollar amount of the net proceeds
         of the Shares actually sold by such Holder pursuant to the registration
         statement.

                           (i) The indemnifying party shall be entitled to
                  participate in and, to the extent it may wish, jointly with
                  any other indemnifying party, to assume the defense of such
                  action at its own expense, with counsel chosen by it and
                  reasonably satisfactory to such indemnified party. The
                  indemnified party shall have the right

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                  to employ separate counsel in any such action and participate
                  in the defense thereof, but the fees and expenses of such
                  counsel (other than reasonable costs of investigation) shall
                  be paid by the indemnified party unless (a) the indemnifying
                  party agrees to pay the same, (b) the indemnifying party fails
                  to assume the defense of such action with counsel reasonably
                  satisfactory to the indemnified party or (c) the named parties
                  to any such action (including any impleaded parties) have been
                  advised by such counsel that representation of such
                  indemnified party and the indemnifying party by the same
                  counsel would be inappropriate under applicable standards of
                  professional conduct (in which case the indemnifying party
                  shall not have the right to assume the defense of such action
                  on behalf of such indemnified party). No indemnifying party
                  shall be liable for any settlement entered into without its
                  consent, which consent shall not be withheld unreasonably.

                           (ii) The reimbursements required to be made by the
                  Company pursuant to Seciton 10(f) shall be made by periodic
                  payments during the course of the investigation or defense, as
                  and when bills are received or expenses incurred.

                           (iii) If the indemnificiation provided for in this
                  Section 10(f) is unavailable or insufficient to hold harmless
                  an indemnified party in respect to any losses, claims,
                  damages, liabilities, expenses or actions in respect thereof
                  referred to herein, then each indemnifying party shall in lieu
                  of indemnifying such indemnified party contribute to the
                  amount paid or payable by such indemnified party as a result
                  of such losses, claims, damages, liabilities, expenses or
                  actions in such proportion as is appropriate to reflect the
                  relative fault of the Company, on the one hand, and the Holder
                  of this Warrant and the holders of any Shares, on the other,
                  in connection with the statements or omissions which resulted
                  in such losses, claims, damages, liabilities, expenses or
                  actions as well as any other relevant equitable
                  considerations, including the failure to give the notice
                  required hereunder. The Company and the Holder of this Warrant
                  agree that it would not be just and equitable if contribution
                  prusuant to this Section 10(f)(iii) were determined by any
                  method of allocation which did not take account of the
                  equitable considerations referred to above. Notwithstanding
                  the provisions of this Section 10(f)(iii), in no event shall
                  the amount contributed by the Holder of this Warrant or the
                  holder of any Shares exceed the net proceeds received by such
                  person from the sale of Shares to which such contribution
                  claim relates. No person guilty of fraudulent
                  misrepresentations (within the meaning of Section 11(f) of the
                  Securities Act) shall be entitled to contribution from any
                  person who is not guilty of such fraudulent misrepresentation.

                           (iv) Each Holder of this Warrant and each holder of
                  Shares, by acceptance hereof or thereof, as the case may be,
                  agrees to the indemnification and contribution provisions of
                  this Section 10(f).

         11. CERTAIN NOTICES. In case at any time the Company shall propose to:

                  (a) declare any cash dividend upon its Common Stock;

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<PAGE>

                  (b) declare any dividend upon its Common Stock payable in
         stock or make any special dividend or other distribution to the holders
         of its Common Stock;

                  (c) offer for subscription to the holders of any of its Common
         Stock any additional shares of stock in any class or other rights;

                  (d) reorganize, or reclassify the capital stock of the
         Company, or consolidate, merge or otherwise combine with, or sell of
         all or substantially all of its assets to, another corporation;

                  (e) voluntarily or involuntarily dissolve, liquidate or wind
         up of the affairs of the Company; or

                  (f) redeem or purchase any shares of its capital stock or
         securities convertible into its capital stock;

         then, in any one or more of said cases, the Company shall give to the
         Holder of the Warrant, by certified or registered mail, (i) at least
         twenty (20) days' prior written notice of the date on which the books
         of the Company shall close or a record shall be taken for such
         dividend, distribution or subscription rights or for determining rights
         to vote in respect of any such reorganization, reclassification,
         consolidation, merger, sale, dissolution, liquidation or winding up,
         and (ii) in the case of such reorganization, reclassification,
         consolidation, merger, sale, dissolution, liquidation or winding up, at
         least twenty (20) days' prior written notice of the date when the same
         shall take place. Any notice required by clause (i) shall also specify,
         in the case of any such dividend, distribution or subscription rights,
         the date on which the holders of Common Stock shall be entitled
         thereto, and any notice required by clause (ii) shall specify the date
         on which the holders of Common Stock shall be entitled to exchange
         their Common Stock for securities or other property deliverable upon
         such reorganization, reclassification, consolidation, merger, sale,
         dissolution, liquidation or winding up, as the case may be.

         12. ARTICLE AND SECTION HEADINGS. Numbered and titled article and
section headings are for convenience only and shall not be construed as
amplifying or limiting any of the provisions of this Warrant.

         13. NOTICE. Notices shall be given respecting this Warrant in the
manner set forth in the Loan Agreement.

         14. SEVERABILITY. If any provisions(s) of this Warrant or the
application thereof to any person or circumstances shall be invalid or
unenforceable to any extent, the remainder of this Warrant and the application
of such provisions to other persons or circumstances shall not be affected
thereby and shall be enforced to the greatest extent permitted by law.

         15. ENTIRE AGREEMENT. This Warrant between the Company and Holder
represents the entire agreement between the parties concerning the subject
matter hereof, and all oral discussions and prior agreement are merged herein.

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         16. GOVERNING LAW AND AMENDMENTS. This Warrant 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.

         17. COUNTERPARTS. This Warrant may be executed in any number of
counterparts and be different parties to this Warrant 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 Warrant.

         18. CONSENT TO JURISDICTION; EXCLUSIVE VENUE. The Company hereby
irrevocably consents to the jurisdiction of the United States District Court for
the Middle District of Tennessee and of all state courts sitting in Davidson
County, Tennessee, for the purpose of any litigation to which Holder may be a
party and which concerns this Warrant. It is further agreed that venue for any
such action shall lie exclusively with courts sitting in Davidson County,
Tennessee unless Holder agrees to the contrary in writing.

         19. WAIVER OF TRIAL BY JURY. HOLDER AND THE COMPANY 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 WARRANT.

         20. EQUITY PARTICIPATION. This Warrant is issued in connection with the
Loan Agreement. It is intended that this Warrant constitute an equity
participation under and pursuant to T.C.A. ss.47-24-101, et seq. and that equity
participation be permitted under said statutes and not constitute interest on
the Note. If under any circumstances whatsoever, fulfillment of any obligation
of this Warrant, the Loan Agreement, or any other agreement or document executed
in connection with the Loan Agreement, shall violate the lawful limit of any
applicable usury statute or any other applicable law with regard to obligations
of like character and amount, then the obligation to be fulfilled shall be
reduced to such lawful limit, such that in no event shall there occur, under
this Warrant, the Loan Agreement, or any other document or instrument executed
in connection with the Loan Agreement, any violation of such lawful limit, but
such obligation shall be fulfilled to the lawful limit. If any sum is collected
in excess of the lawful limit, such excess shall be applied to reduce the
principal amount of the Note.

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         IN WITNESS WHEREOF, the parties hereto have set their hands as of the
date first above written.

                               COMPANY:

                               DYNAGEN, INC.,
                               a Delaware corporation

                               By:_______________________________________
                                  Title:___________________________________

                               HOLDER:

                               FINOVA MEZZANINE CAPITAL INC.
                               a Tennessee corporation

                               By:_______________________________________
                                  Title:___________________________________

                                      -11-EXHIBIT 4.2
                                                                     -----------

                        CONTINGENT STOCK PURCHASE WARRANT
                        ---------------------------------

         This CONTINGENT STOCK PURCHASE WARRANT ("Warrant") is issued as of the
____ day of February, 2001 by DYNAGEN, INC., a Delaware corporation (the
"Company"), to ARGOSY INVESTMENT PARTNERS, L.P. ("Argosy"), a Pennsylvania
limited partnership (Argosy and any subsequent assignee or transferee hereof are
hereinafter referred to collectively as "Holder" or "Holders").

                                   AGREEMENT:

         1. ISSUANCE OF WARRANT; TERM. For and in consideration of ARGOSY
INVESTMENT PARTNERS, L.P. permitting the assumption of an existing loan to the
Company and in consideration of the other settlements and agreements evidenced
by that First Amended and Restated Loan Agreement of even date herewith among
the Company, RXBAZAAR.COM, INC., a Delaware corporation; SUPERIOR PHARMACEUTICAL
COMPANY, an Ohio corporation; ARGOSY; and FINOVA MEZZANINE CAPITAL INC.
("FINOVA"), a Tennessee corporation formerly known as SIRROM Capital
Corporation, in its individual capacity and as Collateral Agent (as now existing
and as may hereafter be amended, the "Loan Agreement"), and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the Company hereby grants to Holder the right to purchase Eight
Hundred Thirty Three Thousand Three Hundred Thirty Three (833,333) shares (the
"Base Amount") of the Company's common stock (the "Common Stock"). The shares of
Common Stock issuable upon exercise of this Warrant are hereinafter referred to
as the "Shares." NOTWITHSTANDING ANY OTHER PROVISION HEREOF, THIS WARRANT SHALL
NOT BE EXERCISABLE UNTIL JUNE 17, 2002, AND SHALL THEN AND THEREAFTER BE
EXERCISABLE IF, AND ONLY IF, AS OF JUNE 17, 2002, THE "OBLIGATIONS" (AS DEFINED
IN THE LOAN AGREEMENT) REMAIN UNPAID IN ANY AMOUNT. IF THE OBLIGATIONS ARE PAID
IN FULL PRIOR TO JUNE 17, 2002 THIS WARRANT SHALL TERMINATE AND BE OF NO FURTHER
EFFECT. The Company warrants and represents that it has formally reserved for
issuance pursuant hereto the number of its common shares necessary to perform
under this Warrant and that the number of shares shall be increased in the
future if necessary to give effect to the antidilution provisions hereof.

         2. EXERCISE PRICE. The exercise price (the "Exercise Price") per share
for which all or any of the Shares may be purchased pursuant to the terms of
this Warrant shall be One Cent ($.01).

         3. EXERCISE. This Warrant may be exercised by the Holder hereof (but
only on the conditions hereinafter set forth) in whole or in part, upon delivery
of written notice of intent to exercise to the Company in the manner at the
address of the Company set forth in Section 13 hereof, together with this
Warrant and payment to the Company of the aggregate Exercise Price of the Shares
so purchased. The Exercise Price shall be payable, at the option of the Holder,
(a) by certified or bank check, (b) by the surrender of that Secured Promissory
Note of this date made by the Company payable to Holder in the original
principal amount of $500,000 (the "Note") or portion thereof having an
outstanding principal balance equal to the aggregate Exercise Price or
<PAGE>

(c) by the surrender of a portion of this Warrant where the Shares subject to
the portion of this Warrant that is surrendered have a fair market value equal
to the aggregate Exercise Price. In the absence of an established public market
for the Common Stock, fair market value shall be established by the Company's
board of directors in a commercially reasonable manner. Upon exercise of this
Warrant as aforesaid, the Company shall as promptly as practicable, and in any
event within fifteen (15) days thereafter, execute and deliver to the Holder of
this Warrant a certificate or certificates for the total number of whole Shares
for which this Warrant is being exercised in such names and denominations as are
requested by such Holder. If this Warrant shall be exercised with respect to
less than all of the Shares, the Holder shall be entitled to receive a new
Warrant covering the number of Shares in respect of which this Warrant shall not
have been exercised, which new Warrant shall in all other respects be identical
to this Warrant. The Company covenants and agrees that it will pay when due any
and all state and federal issue taxes which may be payable in respect of the
issuance of this Warrant or the issuance of any Shares upon exercise of this
Warrant.

         4. COVENANTS AND CONDITIONS. The above provisions are subject to the
following:

                  (a) Neither this Warrant nor the Shares have been registered
         under the Securities Act of 1933, as amended (the "Securities Act"), or
         any state securities laws ("Blue Sky Laws"). This Warrant has been
         acquired for investment purposes and not with a view to distribution or
         resale and may not be sold or otherwise transferred without (i) an
         effective registration statement for such Warrant under the Securities
         Act and such applicable Blue Sky Laws, or (ii) an opinion of counsel,
         which opinion and counsel shall be reasonably satisfactory to the
         Company and its counsel, that registration is not required under the
         Securities Act or under any applicable Blue Sky Laws (the Company
         hereby acknowledges that Boult, Cummings, Conners & Berry PLC is
         acceptable counsel). Transfer of the Shares shall be restricted in the
         same manner and to the same extent as the Warrant and the certificates
         representing such Shares shall bear substantially the following legend:

                  THE SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE
                  HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), OR ANY APPLICABLE STATE SECURITIES LAW
                  AND MAY NOT BE TRANSFERRED UNTIL (I) A REGISTRATION STATEMENT
                  UNDER THE ACT AND SUCH APPLICABLE STATE SECURITIES LAWS SHALL
                  HAVE BECOME EFFECTIVE WITH REGARD THERETO, OR (II) IN THE
                  OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY, REGISTRATION
                  UNDER SUCH SECURITIES ACTS AND SUCH APPLICABLE STATE
                  SECURITIES LAWS IS NOT REQUIRED IN CONNECTION WITH SUCH
                  PROPOSED TRANSFER.

         The Holder hereof and the Company agree to execute such other documents
         and instruments as counsel for the Company reasonably deems necessary
         to effect the

                                      -2-
<PAGE>

         compliance of the issuance of this Warrant and any shares of Common
         Stock issued upon exercise hereof with applicable federal and state
         securities laws.

                  (b) The Company covenants and agrees that all Shares which may
         be issued upon exercise of this Warrant will, upon issuance and payment
         therefor, be legally and validly issued and outstanding, fully paid and
         nonassessable, free from all taxes, liens, charges and preemptive
         rights, if any, with respect thereto or to the issuance thereof. The
         Company shall at all times reserve and keep available for issuance upon
         the exercise of this Warrant such number of authorized but unissued
         shares of Common Stock as will be sufficient to permit the exercise in
         full of this Warrant.

         5. TRANSFER OF WARRANT. Subject to the provisions of Section 4 hereof,
this Warrant may be transferred, in whole or in part, to any person or business
entity, by presentation of the Warrant to the Company with written instructions
for such transfer. Upon such presentation for transfer, the Company shall
promptly execute and deliver a new Warrant or Warrants in the form hereof in the
name of the assignee or assignees and in the denominations specified in such
instructions. The Company shall pay all expenses incurred by it in connection
with the preparation, issuance and delivery of Warrants under this Section.

         6. WARRANT HOLDER NOT SHAREHOLDER; RIGHTS OFFERING; PREEMPTIVE RIGHTS.
Except as otherwise provided herein, this Warrant does not confer upon the
Holder, as such, any right whatsoever as a shareholder of the Company.
Notwithstanding the foregoing, if the Company should offer to all of the
Company's shareholders the right to purchase any securities of the Company, then
all shares of Common Stock that are subject to this Warrant shall be deemed to
be outstanding and owned by the Holder and the Holder shall be entitled to
participate in such rights offering.

         7. OBSERVATION RIGHTS. The Holder of this Warrant shall receive notice
of and be entitled to attend or may send a representative to attend all meetings
of the Company's Board of Directors in a non-voting observation capacity and
shall receive a copy of all correspondence and information delivered to the
Company's Board of Directors, from the date hereof until such time as the
indebtedness evidenced by the Note and by that Unconditional Guaranty of this
date executed by the Company in favor of Holder have been paid in full.

         8. ADJUSTMENT UPON ISSUANCES OR CHANGES IN CAPITAL STOCK.

                  (a) In the case of any stock split, stock dividend,
         recapitalization, combination of shares of the Company, or other
         similar event (each a "Recapitalization Event") occurring after the
         date hereof, then the Holder exercising this Warrant shall receive, for
         the aggregate Exercise Price, the aggregate number and class of shares
         which such Holder would have been entitled to receive if immediately
         prior to such Recapitalization Event this Warrant had been exercised.

                  (b) In the case of any merger, consolidation, exchange of
         shares, separation, reorganization or liquidation of the Company, or
         other similar event (each a "Reorganization Event") occurring after the
         date hereof, as a result of which shares of Common Stock shall be
         changed into the same or a different number of shares of the same or

                                      -3-
<PAGE>

         another class or classes of securities of the Company or another
         entity, or the holders of Common Stock are entitled to receive cash or
         other property, then the Holder exercising this Warrant shall receive,
         for the aggregate Exercise Price, the aggregate number and class of
         shares, cash or other property which such Holder would have received if
         this Warrant had been exercised immediately prior to such
         Reorganization Event.

                  (c) If any adjustment pursuant to this Section 8 would create
         a fractional share of Common Stock (or other security) or a right to
         acquire a fractional share of Common Stock (or other security), such
         fractional share shall be disregarded and the number of shares subject
         to this Warrant shall be the next higher number of shares, rounding all
         fractions upward.

                  (d) Whenever there shall be (i) an issuance of securities by
         the Company (whether or not requiring an adjustment pursuant to Section
         8(a)) or (ii) a record date or closing date set for a Recapitalization
         Event, Reorganization Event or similar event or (iii) an adjustment
         pursuant to this Section 8, the Company shall immediately notify the
         Holder(s) of this Warrant in writing of such issuance or adjustment,
         setting forth in reasonable detail the event requiring the notice and
         the method by which an adjustment, if any, was calculated.

         9. INTENTIONALLY LEFT BLANK.

         10. Registration.

                  (a) The Company and the Holder of the Warrant and the Shares
         agree that if at any time after the date hereof the Company shall
         propose to file a registration statement with respect to any of its
         Common Stock on a form suitable for inclusion of the Shares a secondary
         offering (including its initial public offering), and to the extent
         that it is not prohibited contractually under agreements in effect as
         of the date hereof from including the Shares therein, it will give
         notice in writing to such effect to the Holder(s) at least thirty (30)
         days prior to such filing or as soon thereafter as is practicable, and,
         at the written request of any such registered holder, made within ten
         (10) days after the receipt of such notice, will include therein at the
         Company's cost and expense, but excluding underwriting discounts,
         commissions and filing fees attributable to the Shares included
         therein) such of the Shares as such Holder(s) shall request; provided,
         however, that if the offering being registered by the Company is
         underwritten and if the representative of the underwriters certifies in
         writing that the inclusion therein of the Shares would materially and
         adversely affect the sale of the securities to be sold by the Company
         thereunder, then the Company shall be required to include in the
         offering only that number of securities, including the Shares, which
         the underwriters determine in their sole discretion will not jeopardize
         the success of the offering. The Company may terminate or withdraw any
         registration statement initiated by it and described in this Section
         10(a), provided, that if a Holder of Shares has made a request under
         this Section 10(a), the Company may do so only if the Board of
         Directors has reasonably determined that proceeding with the
         registration statement would not be in the best interests of the
         Company.

                                      -4-
<PAGE>

                  (b) Whenever the Company undertakes to effect the registration
         of any of the Shares, the Company shall, as expeditiously as reasonably
         possible:

                           (i) Prepare and file with the Securities and Exchange
                  Commission (the "Commission") a registration statement
                  covering such Shares and use its best efforts to cause such
                  registration statement to be declared effective by the
                  Commission as expeditiously as possible and to keep such
                  registration effective until the earlier of (A) the date when
                  all Shares covered by the registration statement have been
                  sold or (B) one hundred eighty (180) days from the effective
                  date of the registration statement; provided, that before
                  filing a registration statement or prospectus or any amendment
                  or supplements thereto, the Company will furnish to each
                  Holder of Shares covered by such registration statement,
                  copies of all such documents proposed to be filed (excluding
                  exhibits, unless any such person shall specifically request
                  exhibits), which documents will be subject to the review of
                  such Holders and underwriters, and the Company will not file
                  such registration statement or any amendment thereto or any
                  prospectus or any supplement thereto (including any documents
                  incorporated by reference therein) with the Commission if
                  information in such registration statement or prospectus
                  concerning a particular selling Holder has changed and such
                  Holder or the underwriters, if any, shall reasonably object.

                           (ii) Prepare and file with the Commission such
                  amendments and post-effective amendments to such registration
                  statement as may be necessary to keep such registration
                  statement effective during the period referred to in Section
                  10(b)(i) and to comply with the provisions of the Securities
                  Act with respect to the disposition of all securities covered
                  by such registration statement, and cause the prospectus to be
                  supplemented by any required prospectus supplement, and as so
                  supplemented to be filed with the Commission pursuant to Rule
                  424 under the Securities Act.

                           (iii) Furnish to the selling Holder(s) such numbers
                  of copies of such registration statement, each amendment
                  thereto, the prospectus included in such registration
                  statement (including each preliminary prospectus), each
                  supplement thereto and such other documents as they may
                  reasonably request in order to facilitate the disposition of
                  the Shares owned by them.

                           (iv) Use its best efforts to register and qualify
                  under such other securities laws of such jurisdictions as
                  shall be reasonably requested by any selling Holder and do any
                  and all other acts and things which may be reasonably
                  necessary or advisable to enable such selling Holder to
                  consummate the disposition of the Shares owned by such Holder,
                  in such jurisdictions; provided, however, that the Company
                  shall not be required in connection therewith or as a
                  condition thereto to qualify to transact business or to file a
                  general consent to service of process in any such states or
                  jurisdictions.

                           (v) Promptly notify each selling Holder of the
                  happening of any event as a result of which the prospectus
                  included in such registration statement contains

                                      -5-
<PAGE>

                  an untrue statement of a material fact or omits any fact
                  necessary to make the statements therein not misleading and,
                  at the request of any such Holder, the Company will prepare a
                  supplement or amendment to such prospectus so that, as
                  thereafter delivered to the purchasers of such Shares, such
                  prospectus will not contain an untrue statement of a material
                  fact or omit to state any fact necessary to make the
                  statements therein not misleading.

                           (vi) Provide a transfer agent and registrar for all
                  such Shares not later than the effective date of such
                  registration statement.

                           (vii) Enter into such customary agreements (including
                  underwriting agreements in customary form for a primary
                  offering) and take all such other actions as the underwriters,
                  if any, reasonably request in order to expedite or facilitate
                  the disposition of such Shares (including, without limitation,
                  effecting a stock split or a combination of shares).

                           (viii) Promptly notify the selling Holder(s) of the
                  following events and (if requested by any such person) confirm
                  such notification in writing: (A) the filing of the prospectus
                  or any prospectus supplement and the registration statement
                  and any amendment or post-effective amendment thereto and,
                  with respect to the registration statement or any
                  post-effective amendment thereto, the declaration of the
                  effectiveness of such documents, (B) any requests by the
                  Commission for amendments or supplements to the registration
                  statement or the prospectus or for additional information, (C)
                  the issuance or threat of issuance by the Commission of any
                  stop order suspending the effectiveness of the registration
                  statement or the initiation of any proceedings for that
                  purpose and (D) the receipt by the Company of any notification
                  with respect to the suspension of the qualification of the
                  Shares for sale in any jurisdiction or the initiation or
                  threat of initiation of any proceeding for such purposes.

                           (ix) Use commercially reasonable efforts to prevent
                  the entry of any order suspending the effectiveness of the
                  registration statement and obtain at the earliest possible
                  moment the withdrawal of any such order, if entered.

                           (x) Cooperate with the selling Holder(s) to
                  facilitate the timely preparation and delivery of certificates
                  representing the Shares to be sold and not bearing any
                  restrictive legends, and, upon receipt of satisfactory
                  confirmation on behalf of the Holder of the sale of such
                  Shares pursuant to the registration statement and in
                  accordance with the plan of distribution described therein.

                           (xi) Provide a CUSIP number for all the Shares not
                  later than the effective date of the registration statement.

                           (xii) Otherwise use its best efforts to comply with
                  all applicable rules and regulations of the Commission, and
                  make generally available to its security holders earnings
                  statements satisfying the provisions of Section 11(a) of the
                  Securities Act, no later than forty-five (45) days after the
                  end of any twelve-month period (or

                                      -6-
<PAGE>

                  ninety (90) days, if such period is a fiscal year) (A)
                  commencing at the end of any fiscal quarter in which the
                  Shares are sold to underwriters in a firm or best efforts
                  underwritten offering, or (B) if not sold to underwriters in
                  such an offering, beginning with the first month of the first
                  fiscal quarter of the Company commencing after the effective
                  date of the registration statement, which statements shall
                  cover such twelve-month periods.

                  (c) (c) After the date hereof, the Company shall not grant to
         any holder of securities of the Company any registration rights which
         have a priority greater than or equal to those granted to Holders
         pursuant to this Warrant without the prior written consent of the
         Holder(s).

                  (d) The Company's obligations under Section 10(a) above with
         respect to each Holder of Shares are expressly conditioned upon such
         Holder's furnishing to the Company in writing such information
         concerning such holder and the terms of such holder's proposed offering
         as the Company shall reasonably request for inclusion in the
         registration statement.

                  (e) For purposes of this Section 10, all of the Shares shall
         be deemed to be issued and outstanding.

                  (f) In connection with any registration or qualification of
         securities under this Section 10, the Company agrees to indemnify the
         Holder hereof and the holders of any shares of Common Stock issuable
         upon the exercise hereof and each underwriter thereof, including each
         person, if any, who controls the holder or such stockholder or
         underwriter within the meaning of Section 15 of the Securities Act,
         against all losses, claims, damages, liabilities and expenses
         (including reasonable costs of investigation and the costs, fees and
         expenses of legal counsel) caused by any untrue, or alleged untrue,
         statement of a material fact contained in any registration statement,
         preliminary prospectus, prospectus or notification or offering circular
         (as amended or supplemented if the Company shall have furnished any
         amendments or supplements thereto) or caused by any omission, or
         alleged omission, to state therein a material fact required to be
         stated therein or necessary to make the statements therein not
         misleading, except insofar as such losses, claims, damages, liabilities
         or expenses are caused by any untrue statement or alleged untrue
         statement or omission or alleged omission based upon information
         furnished in writing to the Company by the holder or any such
         stockholder or underwriter expressly for use therein. The Company and
         each officer, director and controlling person of the Company shall be
         indemnified respectively by the Holder of this Warrant and by the
         holders of any Shares for all such losses, claims, damages, liabilities
         and expenses (including the costs of reasonable investigation and the
         costs, fees and expenses of legal counsel) caused by any such untrue,
         or alleged untrue, statement or any such omission or alleged omission,
         based upon information furnished in writing to the Company by the
         Holder hereof or any such stockholder expressly for use therein,
         provided that the liability of each Holder hereof or any such
         stockholder shall be limited to the dollar amount of the net proceeds
         of the Shares actually sold by such Holder pursuant to the registration
         statement.

                                      -7-
<PAGE>

                           (i) The indemnifying party shall be entitled to
                  participate in and, to the extent it may wish, jointly with
                  any other indemnifying party, to assume the defense of such
                  action at its own expense, with counsel chosen by it and
                  reasonably satisfactory to such indemnified party. The
                  indemnified party shall have the right to employ separate
                  counsel in any such action and participate in the defense
                  thereof, but the fees and expenses of such counsel (other than
                  reasonable costs of investigation) shall be paid by the
                  indemnified party unless (a) the indemnifying party agrees to
                  pay the same, (b) the indemnifying party fails to assume the
                  defense of such action with counsel reasonably satisfactory to
                  the indemnified party or (c) the named parties to any such
                  action (including any impleaded parties) have been advised by
                  such counsel that representation of such indemnified party and
                  the indemnifying party by the same counsel would be
                  inappropriate under applicable standards of professional
                  conduct (in which case the indemnifying party shall not have
                  the right to assume the defense of such action on behalf of
                  such indemnified party). No indemnifying party shall be liable
                  for any settlement entered into without its consent, which
                  consent shall not be withheld unreasonably.

                           (ii) The reimbursements required to be made by the
                  Company pursuant to Seciton 10(f) shall be made by periodic
                  payments during the course of the investigation or defense, as
                  and when bills are received or expenses incurred.

                           (iii) If the indemnificiation provided for in this
                  Section 10(f) is unavailable or insufficient to hold harmless
                  an indemnified party in respect to any losses, claims,
                  damages, liabilities, expenses or actions in respect thereof
                  referred to herein, then each indemnifying party shall in lieu
                  of indemnifying such indemnified party contribute to the
                  amount paid or payable by such indemnified party as a result
                  of such losses, claims, damages, liabilities, expenses or
                  actions in such proportion as is appropriate to reflect the
                  relative fault of the Company, on the one hand, and the Holder
                  of this Warrant and the holders of any Shares, on the other,
                  in connection with the statements or omissions which resulted
                  in such losses, claims, damages, liabilities, expenses or
                  actions as well as any other relevant equitable
                  considerations, including the failure to give the notice
                  required hereunder. The Company and the Holder of this Warrant
                  agree that it would not be just and equitable if contribution
                  prusuant to this Section 10(f)(iii) were determined by any
                  method of allocation which did not take account of the
                  equitable considerations referred to above. Notwithstanding
                  the provisions of this Section 10(f)(iii), in no event shall
                  the amount contributed by the Holder of this Warrant or the
                  holder of any Shares exceed the net proceeds received by such
                  person from the sale of Shares to which such contribution
                  claim relates. No person guilty of fraudulent
                  misrepresentations (within the meaning of Section 11(f) of the
                  Securities Act) shall be entitled to contribution from any
                  person who is not guilty of such fraudulent misrepresentation.

                           (iv) Each Holder of this Warrant and each holder of
                  Shares, by acceptance hereof or thereof, as the case may be,
                  agrees to the indemnification and contribution provisions of
                  this Section 10(f).

                                      -8-
<PAGE>

         11. CERTAIN NOTICES. In case at any time the Company shall propose to:

                  (a) declare any cash dividend upon its Common Stock;

                  (b) declare any dividend upon its Common Stock payable in
         stock or make any special dividend or other distribution to the holders
         of its Common Stock;

                  (c) offer for subscription to the holders of any of its Common
         Stock any additional shares of stock in any class or other rights;

                  (d) reorganize, or reclassify the capital stock of the
         Company, or consolidate, merge or otherwise combine with, or sell of
         all or substantially all of its assets to, another corporation;

                  (e) voluntarily or involuntarily dissolve, liquidate or wind
         up of the affairs of the Company; or

                  (f) redeem or purchase any shares of its capital stock or
         securities convertible into its capital stock;

         then, in any one or more of said cases, the Company shall give to the
         Holder of the Warrant, by certified or registered mail, (i) at least
         twenty (20) days' prior written notice of the date on which the books
         of the Company shall close or a record shall be taken for such
         dividend, distribution or subscription rights or for determining rights
         to vote in respect of any such reorganization, reclassification,
         consolidation, merger, sale, dissolution, liquidation or winding up,
         and (ii) in the case of such reorganization, reclassification,
         consolidation, merger, sale, dissolution, liquidation or winding up, at
         least twenty (20) days' prior written notice of the date when the same
         shall take place. Any notice required by clause (i) shall also specify,
         in the case of any such dividend, distribution or subscription rights,
         the date on which the holders of Common Stock shall be entitled
         thereto, and any notice required by clause (ii) shall specify the date
         on which the holders of Common Stock shall be entitled to exchange
         their Common Stock for securities or other property deliverable upon
         such reorganization, reclassification, consolidation, merger, sale,
         dissolution, liquidation or winding up, as the case may be.

         12. ARTICLE AND SECTION HEADINGS. Numbered and titled article and
section headings are for convenience only and shall not be construed as
amplifying or limiting any of the provisions of this Warrant.

         13. NOTICE. Notices shall be given respecting this Warrant in the
manner set forth in the Loan Agreement.

         14. SEVERABILITY. If any provisions(s) of this Warrant or the
application thereof to any person or circumstances shall be invalid or
unenforceable to any extent, the remainder of this Warrant and the application
of such provisions to other persons or circumstances shall not be affected
thereby and shall be enforced to the greatest extent permitted by law.

                                      -9-
<PAGE>

         15. ENTIRE AGREEMENT. This Warrant between the Company and Holder
represents the entire agreement between the parties concerning the subject
matter hereof, and all oral discussions and prior agreement are merged herein.

         16. GOVERNING LAW AND AMENDMENTS. This Warrant 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.

         17. COUNTERPARTS. This Warrant may be executed in any number of
counterparts and be different parties to this Warrant 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 Warrant.

         18. CONSENT TO JURISDICTION; EXCLUSIVE VENUE. The Company hereby
irrevocably consents to the jurisdiction of the United States District Court for
the Middle District of Tennessee and of all state courts sitting in Davidson
County, Tennessee, for the purpose of any litigation to which Holder may be a
party and which concerns this Warrant. It is further agreed that venue for any
such action shall lie exclusively with courts sitting in Davidson County,
Tennessee unless Holder agrees to the contrary in writing.

         19. WAIVER OF TRIAL BY JURY. HOLDER AND THE COMPANY 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 WARRANT.

         20. EQUITY PARTICIPATION. This Warrant is issued in connection with the
Loan Agreement. It is intended that this Warrant constitute an equity
participation under and pursuant to T.C.A. ss.47-24-101, et seq. and that equity
participation be permitted under said statutes and not constitute interest on
the Note. If under any circumstances whatsoever, fulfillment of any obligation
of this Warrant, the Loan Agreement, or any other agreement or document executed
in connection with the Loan Agreement, shall violate the lawful limit of any
applicable usury statute or any other applicable law with regard to obligations
of like character and amount, then the obligation to be fulfilled shall be
reduced to such lawful limit, such that in no event shall there occur, under
this Warrant, the Loan Agreement, or any other document or instrument executed
in connection with the Loan Agreement, any violation of such lawful limit, but
such obligation shall be fulfilled to the lawful limit. If any sum is collected
in excess of the lawful limit, such excess shall be applied to reduce the
principal amount of the Note.

                                      -10-
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have set their hands as of the
date first above written.

                                    COMPANY:

                                    DYNAGEN, INC.,
                                    a Delaware corporation

                                    By:_______________________________________
                                       Title:___________________________________

                                     HOLDER:

                                     ARGOSY INVESTMENT PARTNERS, L.P.
                                     a Pennsylvania Limited Partnership

                                     By: Argosy Associates, L.P., its general
                                         partner

                                         By:_________________________________
                                         Title:_______________________________

                                      -11-

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