<PAGE>   1
                                                                      Exhibit 4f



         THE SECURITY REPRESENTED HEREBY HAS NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THIS
SECURITY MAY NOT BE SOLD, ASSIGNED OR TRANSFERRED WITHOUT AN EFFECTIVE
REGISTRATION STATEMENT FOR SUCH SECURITY UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR APPLICABLE STATE SECURITIES LAWS, UNLESS THE COMPANY HAS RECEIVED
THE WRITTEN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH SALE,
ASSIGNMENT OR TRANSFER DOES NOT INVOLVE A TRANSACTION REQUIRING REGISTRATION OF
SUCH SECURITY UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE
SECURITIES LAWS.


                                     WARRANT

                                 MARCH 19, 1998

                   VOID UNLESS EXERCISED BEFORE MARCH 19, 2001

                                  DYNAGEN, INC.

         DYNAGEN, INC., a Delaware corporation (the "Company"), hereby certifies
that, for good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the Holder is entitled, subject to and in accordance
with the terms set forth below, to purchase from the Company, commencing on the
date hereof, at any time or from time to time before 5:00 P.M. Eastern Standard
Time on March 19, 2001, a number of shares of fully paid and non-assessable
shares of common stock, equal to the Warrant Percentage, as hereinafter defined,
at an aggregate exercise price of U.S. $150,000 (the "Exercise Price").

         As used herein the following terms, unless the context otherwise
requires, have the following respective meanings:

         (a)      The term "Company" means DynaGen, Inc., a Delaware
                  corporation, and any corporation that succeeds to or assumes
                  the obligations of the Company hereunder.

         (b)      The term "Common Stock" means (a) the Company's common stock,
                  $.01 par value per share.

         (c)      The term "Exercise Date" means any date on which this Warrant
                  is exercised in whole or in part in accordance with the terms
                  hereof.

         (d)      The term "Other Securities" means any stock and other
                  securities of any other person (corporate or otherwise) which
                  the holder of this Warrant at any time shall be entitled to
                  receive, or shall have received, on the exercise of the
                  Warrant, in lieu of or in 
<PAGE>   2
                  addition to Common Stock, or which at any time shall be
                  issuable or shall have been issued in exchange for or in
                  replacement of Common Stock or Other Securities pursuant to
                  Section 3.

         (e)      The term "Warrant Amount" means the number of shares of Common
                  Stock equal to one percent (1%) of the shares of Common Stock
                  issued and outstanding at the close of business on the day
                  immediately preceding any Exercise Date. Solely for the
                  purposes of calculating the Warrant Amount, shares of Common
                  Stock issuable pursuant to the terms of any convertible
                  security of the Company within sixty days of any Exercise Date
                  shall be deemed issued and outstanding, except for any such
                  shares of Common Stock issuable upon exercise of any option,
                  warrant or other derivative security issued to any employee of
                  the Company or pursuant to any benefit plan of the Company.

         1.       Exercise of Warrant

         (a) Exercise in Full. This Warrant may be exercised in full by the
holder hereof by surrender of this Warrant, with the form of subscription
attached hereto duly executed by such holder, to the Company at its principal
office, accompanied by payment of the Exercise Price, in cash or by certified or
official bank check payable to the order of the Company.

         (b) Partial Exercise. This Warrant may be exercised in part by
surrender of this Warrant in the manner and at the place provided in Section
1(a) except that this Warrant may not be exercised in any increment less than
one-third of the original Warrant Amount. The amount payable by the holder on
such partial exercise shall be the amount obtained by multiplying (i) the
Exercise Price by (ii) the percentage of the Warrant Amount for which the
Warrant is being exercised. Upon any such partial exercise, the Company at its
expense will forthwith issue and deliver to or upon the order of the holder
hereof a new Warrant of like tenor, in the name of the holder hereof, stating on
the face thereof (x) the remaining percentage of the Warrant Amount for which
the Warrant may still be exercised and (y) the remaining portion of the Exercise
Price.

         2. Delivery of Stock Certificates on Exercise. As soon as practicable
after the exercise of this Warrant, and in any event within five (5) trading
days after the Company receives (i) the original form of subscription properly
completed, (ii) the Warrant and (iii) payment of the Exercise Price pursuant to
Section 1 above, the Company at its expense (including the payment by it of any
applicable issue taxes) will cause to be issued in the name of and delivered to
the holder hereof, or as such holder (upon payment by such holder of any
applicable transfer taxes) may direct, a certificate or certificates for the
number of fully paid and non-assessable shares of Common Stock (or Other
Securities) to which such holder shall be entitled on such exercise. The
exercise date of this Warrant shall be the date on which the Company receives,
by telecopier or otherwise, the properly completed form of subscription attached
hereto.


                                       2
<PAGE>   3
         3. Adjustment for Reorganization, Consolidation or Merger. In case at
any time or from time to time, the Company shall (a) effect a reorganization,
(b) consolidate with or merge into any other person or entity, or (c) transfer
all or substantially all of its properties or assets to any other person under
any plan or arrangement contemplating the dissolution of the Company, then, in
each such case, the holder of this Warrant, on the exercise hereof as provided
in Section 1 at any time after the consummation of any corporate event referred
to in this Section 3 shall receive, upon the proper and rightful exercise of
this Warrant, in lieu of the Common Stock (or Other Securities) issuable on such
exercise prior to such consummation or such effective date, the Other Securities
and any other property (including cash) to which such holder would have been
entitled upon such event, if such holder had so exercised this Warrant
immediately prior thereto. Upon any corporate event referred to in this Section
3, this Warrant shall continue in full force and effect and the terms hereof
shall be applicable to the Other Securities and any other property receivable on
the exercise of this Warrant after the consummation of such reorganization,
consolidation or merger, as the case may be, and shall be binding upon the
issuer of any such stock or other securities.

         4.       Notices of Record Date.  In the event of

         (a)      any taking by the Company of a record of the holders of any
                  class or securities for the purpose of determining the holders
                  thereof who are entitled to receive any dividend or other
                  distribution, or any right to subscribe for, purchase or
                  otherwise acquire any shares of stock of any class or any
                  other securities or property, or to receive any other right,
                  or

         (b)      any corporate event referred to in Section 3, or

         (c)      any voluntary or involuntary dissolution, liquidation or 
                  winding-up of the Company,

then and in each such event the Company will mail or cause to be mailed to the
holder of this Warrant a notice specifying (i) the date on which any such record
is to be taken for the purpose of such dividend, distribution or right, and
stating the amount and character of such dividend, distribution or right, and
(ii) the date on which any corporate event referred to in Section 3 is to take
place, and the time, if any is to be fixed, as of which the holders of record of
Common Stock (or Other Securities) shall be entitled to exchange their shares of
Common Stock (or Other Securities) for securities or other property deliverable
on any corporate event referred to in Section 3. Such notice shall be mailed at
least twenty (20) days prior to the date specified in such notice on which any
such action is to be taken.

         5. Reservation of Common Stock Issuable on Exercise of Warrant. The
Company will at all times reserve and keep available solely for issuance and
delivery upon exercise of this Warrant, a sufficient number of shares of Common
Stock from time to time issuable on the exercise of this Warrant, and the shares
of Common Stock which the holder shall receive upon exercise of this Warrant
will be duly authorized, validly issued, fully paid and non-assessable.


                                       3
<PAGE>   4
         6. Replacement of Warrant. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of any such loss, theft or destruction of this
Warrant, on delivery of an indemnity agreement or security reasonably
satisfactory in form and amount to the Company or, in the case of any such
mutilation, on surrender and cancellation of such Warrant, the Company at its
expense will execute and deliver, in lieu thereof, a new Warrant of like tenor.

         7. Warrantholder Not Deemed Stockholder; Restrictions on Transfer. This
Warrant is issued upon the following terms, to all of which each holder or owner
hereof by the taking hereof consents and agrees:

         (a)      Except as otherwise expressly set forth in Section 3, with
                  respect to computing adjustments with respect hereto, no
                  holder of this Warrant shall, as such, be deemed the holder of
                  Common Stock that may at any time be issuable upon exercise of
                  this Warrant for any purpose whatsoever, nor shall anything
                  contained herein be construed to confer upon such holder, as
                  such, any of the rights of a stockholder of the Company until
                  such holder shall have delivered formal notice to the Company
                  of an intention to exercise this Warrant, tendered promptly
                  the consideration required for exercise (whether cash or
                  securities), exercised the Warrant, and been issued shares of
                  Common Stock in accordance with the provisions hereof.

         (b)      This Warrant is not transferable or assignable to any party
                  other than an affiliate of the Holder without the prior
                  written consent of the Company. A holder that wishes to
                  transfer or assign this Warrant shall provide to the Company
                  an opinion of counsel satisfactory to the Company that such
                  transfer is permissible under applicable law.

         8. Notices. All notices and other communications from the Company to
the holder of this Warrant shall be sent by (i) first class mail, postage
prepaid, (ii) electronic facsimile transmission, or (iii) express overnight
courier service, at such address or facsimile number as may have been furnished
to the Company in writing by such holder or, until any such holder furnishes to
the Company an address or facsimile number, then to, and at the address or
facsimile number of, the last holder of this Warrant who has so furnished an
address to the Company.

         9. Miscellaneous. This Warrant and any term hereof may be changed,
waived, discharged or terminated only by an instrument in writing signed by the
party against which enforcement of such change, waiver, discharge or termination
is sought. This Warrant and the shares of Common Stock underlying this Warrant
shall be construed and enforced in accordance with and


                                       4
<PAGE>   5
governed by the laws of the State of Delaware. The invalidity or
unenforceability of any provision hereof shall in no way affect the validity or
enforceability of any other provision.



Dated: March 19, 1998                       DYNAGEN, INC.


                                            By: Dhananjay G. Wadekar
                                            Name: Dhananjay G. Wadekar
                                            Title: Executive Vice President


ATTEST:

By:______________________________




                                       5
<PAGE>   6
                              FORM OF SUBSCRIPTION
                   (TO BE SIGNED ONLY ON EXERCISE OF WARRANT)


To:  DynaGen, Inc.

         The undersigned, the holder of the within Warrant, hereby irrevocably
elects to exercise this Warrant for, and to purchase thereunder, a number of
shares of common stock, $0.01 par value per share ("Common Stock") of DynaGen,
Inc., a Delaware corporation, equal to __________% of the Warrant Amount as
defined in the Warrant, on the date this form of subscription is received by the
Company in accordance with the terms of the Warrant, and herewith makes payment
of $__________ therefor, and requests that the certificates for such shares be
issued in the name of, and delivered to__________________________, whose address
is ______________________________________.

Dated:


                        By:______________________________
                        Name:____________________________


                        Signature must conform to name of holder as specified
                        on the face of the Warrant)


                        Address:

                         _________________________________

                         _________________________________


                                       6
<PAGE>   7
                               FORM OF ASSIGNMENT
                   (TO BE SIGNED ONLY ON TRANSFER OF WARRANT)




         For value received, the undersigned hereby sells, assigns, and
transfers unto ____________ the right represented by the within Warrant to
purchase the number of shares of Common Stock of DynaGen, Inc., a Delaware
corporation, to which the within Warrant relates, and appoints ______________
attorney to transfer such right on the books of DynaGen, Inc., a Delaware
corporation, with full power of substitution in the premises.


Dated:


                        By:______________________________
                        Name:____________________________


                        Signature must conform to name of holder as specified
                        on the face of the Warrant)


                        Address:

                         _________________________________

                         _________________________________


Signed in the presence of:

_____________________________

Name:________________________


                                       7