PLACEMENT AGENT WARRANT



THE WARRANT REPRESENTED BY THIS CERTIFICATE AND THE SECURITIES ISSUABLE UPON
EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "ACT"), OR ANY STATE SECURITIES LAWS AND NEITHER SUCH SECURITIES
NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, PLEDGED, ASSIGNED OR OTHERWISE
TRANSFERRED UNLESS (1) A REGISTRATION STATEMENT WITH RESPECT THERETO IS
EFFECTIVE UNDER THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS, OR (2) THE
COMPANY RECEIVES AN OPINION OF COUNSEL TO THE HOLDER OF SUCH SECURITIES, WHICH
COUNSEL AND OPINION ARE REASONABLY SATISFACTORY TO THE COMPANY, THAT SUCH
SECURITIES MAY BE OFFERED, SOLD, PLEDGED, ASSIGNED OR TRANSFERRED IN THE MANNER
CONTEMPLATED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR
APPLICABLE STATE SECURITIES LAWS.


                         THE TRANSFER OF THIS WARRANT IS
                         RESTRICTED AS DESCRIBED HEREIN.

                           MARC PHARMACEUTICALS, INC.

                   Warrant for the purchase of 2,000,000 units
                  each consisting of one share of Common Stock,
                          $0.0001 par value per share,
          one warrant to purchase one share of Common Stock at $.50 and
           two warrants to purchase one share of Common Stock at $1.00


                 THIS WARRANT EXPIRES ON [                     ]
                                          ---------------------

                                            A Maximum of 2,000,000 Warrant Units


         THIS CERTIFIES that, for value received, WIEN SECURITIES CORP. with an
address at 525 Washington Blvd., Jersey City, New Jersey 07310 (including any
permitted transferee, the "Holder"), is entitled to subscribe for and purchase
from Marc Pharmaceuticals, Inc., a Delaware corporation (the "Company"), upon
the terms and conditions set forth herein, at any time from ________________,
2004 to any time before 5:00 P.M. on ____________________, New York, New York
time (the "Exercise Period"), up to 2,000,000 units (the "Warrant Units"), at a
price



equal to $.31 per Warrant Unit (the "Exercise Price"). Each Warrant Unit
consists of one (1) share of the Company's common stock, $0.0001 par value per
share ("Common Stock"), one (1) warrant (in the form attached hereto as Exhibit
A) ("Future Placement Agent Warrant One") to purchase one (1) share of Common
Stock, at a price equal to $.50 per share to be exercised by ________, 2009, and
two (2) warrants (in the form attached hereto) ("Future Placement Agent Warrant
Two," and together with the Future Placement Agent Warrant One, the "Future
Warrants") to purchase one (1) share of Common Stock, at a price equal to $1.00
per share to be exercised by ________, 2009. Where the context requires, the
term "Warrant Unit" shall include the shares of Common Stock and Future Warrants
which comprise a Warrant Unit. This Warrant is the warrant or one of the
warrants (collectively, including any warrants issued upon the exercise or
transfer of any such warrants in whole or in part, the "Warrants") issued to the
Holder in connection with its acting as the placement agent for an initial
public offering (the "Offering") by the Company of 20,000,000 units (the
"Investor Units"), each Investor Unit consisting of one (1) share of Common
Stock, one (1) Class A warrant to purchase one (1) share of Common Stock at a
price equal to $.50 per share, and two (2) Class B warrants to purchase one (1)
share of Common Stock at a price equal to $1.00 per share (collectively, with
all warrants included in the Investor Units, the "Investor Warrants"), pursuant
to a Prospectus, dated __________, 2004), as it may be supplemented or amended
(the "Prospectus"). In the event the Placement Agent does not sell all of the
2,000,000 Investor Units offered by the Company in the Offering, the Placement
Agent will not be entitled to purchase all of the 2,000,000 Warrant Units.
Notwithstanding any other provision of this Warrant, the Placement Agent shall
be entitled to purchase only an amount of Warrant Units that equal eight percent
(8%) of the total amount of Investor Units sold by the Placement Agent in the
Offering. As used herein, the term "this Warrant" shall mean and include this
Warrant and any Warrant or Warrants hereafter issued as a consequence of the
exercise or transfer of this Warrant in whole or in part.


         The number of Warrant Units issuable upon exercise of this Warrant and
the Exercise Price may be adjusted from time to time as hereinafter set forth.

         1. Exercise Period and Exercise Price.


         (a) The exercise period of this Warrant and each Warrant Unit shall not
exceed five (5) years from the effective date of the Prospectus.

         (b) This Warrant may be exercised during the Exercise Period, as to the
whole or any lesser number of whole Warrant Units (subject to the limitation set
forth in the preamble to this Warrant), by the surrender of this Warrant (with
the election at the end hereof duly executed) to the Company at its office at
350 Bedford Street, Stamford, Connecticut 06901, or at such other place as is
designated in writing by the Company, together with cash or a certified or bank
cashier's check payable to the order of the Company in an amount equal to the
Exercise Price multiplied by the number of Warrant Units for which this Warrant
is being exercised.

         (c) All or any part of this Warrant may be exercised on a "cashless"
basis, by stating in the exercise notice such intention, and the maximum number
(the "Maximum Number") of Warrant Units the Holder elects to purchase pursuant
to such exercise. The number of Warrant Units which the Holder shall receive
(the "Cashless Exercise Number") shall equal the Maximum Number minus the
quotient that is obtained when the product of the Maximum Number and the then
current



Exercise Price is divided by the then Current Market Price (as hereinafter
defined) per share of Common Stock. As used herein, "Current Market Price" per
share of Common Stock shall mean, on any date, the product of (i) the average of
the daily closing prices for the Company's Common Stock for the thirty (30)
consecutive trading days immediately preceding such date, and (ii) the number of
shares of Common Stock into which each Warrant Unit is convertible at the time
of such exercise. The closing price for each day shall be the last reported
sales price regular way or, in the case no such reported sale takes place on
such day, the closing bid price regular way, in either case on the principal
national securities exchange (including, for purposes hereof, the NASDAQ
National Market) on which the Common Stock is listed or admitted to trading or,
if the Common Stock is not listed or admitted to trading on any national
securities exchange, the highest reported bid price for the Common Stock as
furnished by the National Association of Securities Dealers, Inc. ("NASD")
through NASDAQ or a similar organization if NASDAQ is no longer reporting such
information. If on any such date the Common Stock is not listed or admitted to
trading on any national securities exchange and is not quoted by NASDAQ or any
similar organization, the Current Market Price shall mean the fair value of the
shares of Common Stock into which each Warrant Unit is convertible at the time
of such exercise on such date, as determined in good faith by the board of
directors of the Company, whose determination shall be conclusive absent
manifest error.

         (d) The Company may redeem this Warrant at any time during the Exercise
Period, by providing the Holder with the time, manner and place of redemption by
first class or registered mail, postage prepaid, at the address set forth in
this Warrant, after the occurrence of a "Redemption Event." A Redemption Event
shall be the fifth consecutive trading day upon which the Common Stock has been
trading at $1.25 per share, determined by taking the average between the "bid"
and "ask" price of the Common Stock on each such day, at a price of $.001 per
number of shares which may be purchased by this Warrant, subject to appropriate
adjustment in the event of any stock dividend, stock split, combination or other
similar recapitalization affecting such shares.


         2. Purchase of Warrant Units. (a) Upon each exercise of the Holder's
rights to purchase Warrant Units, the Holder shall be deemed to be the holder of
record of the Warrant Units issuable upon such exercise, notwithstanding that
the transfer books of the Company shall then be closed or certificates
representing such Warrant Units shall not then have been actually delivered to
the Holder. As soon as practicable after each such exercise of this Warrant, the
Company shall issue and deliver to the Holder a certificate or certificates for
the Warrant Units issuable upon such exercise, registered in the name of the
Holder or its designee. If this Warrant should be exercised in part only, the
Company shall, upon surrender of this Warrant for cancellation, execute and
deliver a new Warrant evidencing the right of the Holder to purchase the balance
of the Warrant Units (or portions thereof) subject to purchase hereunder.

             (b) Notwithstanding the provisions of the Future Warrants, the call
provision of each of the Future Warrants shall not be applicable to the Holder,
and the Company hereby waives its rights pursuant to such call provisions.

         3. Exercise Procedure. Any shares of Common Stock issued upon the
exercise in part of this Warrant shall be numbered and shall be registered in a
Common Stock Register as they are issued. Any Future Warrants issued upon the
exercise in part of this Warrant shall be registered in



a Warrant Register as they are issued. The Company shall be entitled to treat
the registered holder of any part of any Warrant Unit on either such Register as
the owner in fact thereof for all purposes and shall not be bound to recognize
any equitable or other claim to or interest in such Warrant Unit on the part of
any other person, and shall not be liable for any registration or transfer of
Warrant Units which are registered or to be registered in the name of a
fiduciary or the nominee of a fiduciary unless made with the actual knowledge
that a fiduciary or nominee is committing a breach of trust in requesting such
registration or transfer, or with the knowledge of such facts that its
participation therein amounts to bad faith. This Warrant shall be transferable
only on the books of the Company upon delivery thereof duly endorsed by the
Holder or by his duly authorized attorney or representative, or accompanied by
proper evidence of succession, assignment, or authority to transfer. In all
cases of transfer by an attorney, executor, administrator, guardian, or other
legal representative, duly authenticated evidence of his or its authority shall
be produced. Upon any registration of transfer, the Company shall deliver a new
Warrant or Warrants to the person entitled thereto. This Warrant may be
exchanged, at the option of the Holder thereof, for another Warrant, or other
Warrants of different denominations, of like tenor and representing in the
aggregate the right to purchase a like number of Warrant Units (or portions
thereof), upon surrender to the Company or its duly authorized agent.
Notwithstanding the foregoing, the Company shall have no obligation to cause
Warrants to be transferred on its books to any person if, in the opinion of
counsel to the Company, such transfer does not comply with the provisions of the
Securities Act of 1933, as amended (the "Act"), and the rules and regulations
thereunder.

         4. Registration Rights.

             (a) The Holder acknowledges that it has been advised by the Company
that neither this Warrant nor the Warrant Units have been registered under the
Act, that this Warrant is being or has been issued and the Warrant Units may be
issued on the basis of the statutory exemption provided by Section 4(2) of the
Act or Regulation D promulgated thereunder, or both, relating to transactions by
an issuer not involving any public offering. The Holder acknowledges that it has
been informed by the Company of, or is otherwise familiar with, the nature of
the limitations imposed by the Act and the rules and regulations thereunder on
the transfer of securities. In particular, the Holder agrees that no sale,
assignment or transfer of this Warrant or the Warrant Units issuable upon
exercise hereof shall be valid or effective, and the Company shall not be
required to give any effect to any such sale, assignment or transfer, unless (i)
the sale, assignment or transfer of this Warrant or such Warrant Units is
registered under the Act, it being understood that neither this Warrant nor such
Warrant Units are currently registered for sale and that the Company has no
obligation or intention to so register this Warrant or such Warrant Units except
as specifically provided herein, or (ii) this Warrant or such Warrant Units are
sold, assigned or transferred in accordance with all the requirements and
limitations of Rule 144 under the Act, it being understood that Rule 144 is not
available at the time of the original issuance of this Warrant for the sale of
this Warrant or such Warrant Units and that there can be no assurance that Rule
144 sales will be available at any subsequent time, or (iii) such sale,
assignment, or transfer is otherwise exempt from registration under the Act.

             (b) The Company has granted certain "piggy back" registration
rights to the Holder pursuant to the Registration Rights Agreement of even date
herewith.



         5. Reservation of Common Stock. The Company shall at all times reserve
and keep available, solely for the purpose of providing for the exercise of the
rights to purchase all Warrant Units granted pursuant to this Warrant, such
number of shares of Common Stock and other stock, securities and property as
from time to time are receivable upon exercise of this Warrant and Future
Warrants. The Company covenants that all shares of Common Stock issuable upon
exercise of this Warrant and Future Warrants, upon receipt by the Company of the
full Exercise Price therefor, shall be validly issued, fully paid,
nonassessable, and free of preemptive rights.

         6. Notice of Adjustments. The Exercise Price and the number of Warrant
Units and shares of Common Stock subject to this Warrant and Future Warrants
shall be subject to adjustment from time to time as follows:

                           (a) Subdivision or Combination of Stock. (i) If at
                  any time or from time to time following the date of issuance
                  of this Warrant the Company shall subdivide its outstanding
                  shares of Common Stock, the Exercise Price for this Warrant
                  (and for any Future Warrants which may be subsequently issued)
                  in effect immediately prior to such subdivision shall be
                  proportionately reduced, and conversely, in case the
                  outstanding shares of Common Stock of the Company shall be
                  combined into a smaller number of shares, the Exercise Price
                  in effect immediately prior to such combination shall be
                  proportionately increased.

                  (ii) Upon each adjustment of the Exercise Price as provided in
(a)(i) above, the Holder shall thereafter be entitled to purchase, at the
Exercise Price resulting from such adjustment, the number of Warrant Units
(calculated to the nearest whole share of Common Stock and the nearest whole
Future Warrant) obtained by multiplying the Exercise Price in effect immediately
prior to such adjustment by the number of Warrant Units purchasable pursuant
hereto immediately prior to such adjustment and dividing the product thereof by
the Exercise Price resulting from such adjustment.

                           (b) Adjustment for Stock Dividends. If and whenever
                  at any time the Company shall declare a dividend or make any
                  other distribution upon any class or series of stock of the
                  Company payable in shares of Common Stock or securities
                  convertible into shares of Common Stock, the Exercise Price
                  and the number of Warrant Units to be obtained upon exercise
                  of this Warrant shall be proportionately adjusted to reflect
                  the issuance of any shares of Common Stock or convertible
                  securities, as the case may be, issuable in payment of such
                  dividend or distribution.

                           (c) Reorganization, Reclassification, Consolidation,
                  Merger or Sale. If any capital reorganization of the capital
                  stock of the Company, or any consolidation or merger of the
                  Company with another corporation, or the sale of all or
                  substantially all of its assets to another corporation shall
                  be effected in such a way that holders of Common Stock shall
                  be entitled to receive stock, securities, or other assets or
                  property, then, as a condition of such reorganization,
                  reclassification, consolidation, merger or sale, lawful



                  and adequate provisions shall be made whereby the Holder
                  hereof shall thereafter have the right to purchase and receive
                  (in lieu of the shares of Common Stock immediately theretofore
                  purchasable as part of the Warrant Units and receivable upon
                  the exercise of the rights represented hereby) such shares of
                  stock, securities or other assets or property as may be issued
                  or payable with respect to or in exchange for a number of
                  outstanding shares of Common Stock equal to the number of
                  shares of such stock immediately theretofore purchasable and
                  receivable upon the exercise of the rights represented hereby
                  and the terms of the Future Warrants shall also be adjusted
                  accordingly. In any reorganization described above,
                  appropriate provision shall be made with respect to the rights
                  and interests of the Holder of this Warrant to the end that
                  the provisions hereof (including, without limitation,
                  provisions for adjustments of the Exercise Price and of the
                  number of Warrant Units purchasable and receivable upon the
                  exercise of this Warrant) shall thereafter be applicable, as
                  nearly as may be, in relation to any shares of stock,
                  securities or assets thereafter deliverable upon the exercise
                  hereof. The Company will not effect any such consolidation,
                  merger or sale unless, prior to the consummation thereof, the
                  successor corporation (if other than the Company) resulting
                  from such consolidation or the corporation purchasing such
                  assets shall assume by written instrument, executed and mailed
                  or delivered to the registered Holder hereof at the last
                  address of such Holder appearing on the books of the Company,
                  the obligation to deliver to such Holder such shares of stock,
                  securities or assets as, in accordance with the foregoing
                  provisions, such Holder may be entitled to purchase.

                           (d) Minimal Adjustments. No adjustment in the
                  Exercise Price and/or the number of Warrant Units subject to
                  this Warrant need be made if such adjustment would result in a
                  change in the Exercise Price of less than five cents ($0.05)
                  (the "Adjustment Threshold Amount"). Any adjustment less than
                  these amounts which is not made shall be carried forward and
                  shall be made together with any subsequent adjustments, at the
                  time when (i) the aggregate amount of all such adjustments is
                  equal to at least the Adjustment Threshold Amount or (ii) this
                  Warrant is exercised.

                           (e) Certificate of Adjustments. Upon the occurrence
                  of each adjustment or readjustment of the Exercise Price
                  pursuant to this Section 7, the Company, at its expense, shall
                  promptly compute such adjustment or readjustment in accordance
                  with the terms hereof and prepare and furnish to the Holder a
                  certificate setting forth such adjustment or readjustment and
                  showing in detail the facts upon which such adjustment or
                  readjustment is based. The Company shall, upon written request
                  at any time of the Holder, furnish or cause to be furnished to
                  the Holder a like certificate setting forth (i) such
                  adjustments and readjustments, (ii) the then effective
                  Exercise Price and number of shares of Common Stock subject to
                  this Warrant and the Future Warrants, and (iii) the then
                  effective amount of securities (other than



                  the shares of Common Stock) and other property, if any, which
                  would be received upon exercise of this Warrant and the Future
                  Warrants.

         8. Expenses. The issuance of any Warrant Units or other securities upon
the exercise of this Warrant, and the delivery of certificates or other
instruments representing such warrant units or other securities, shall be made
without charge to the Holder for any tax or other charge in respect of such
issuance. The Company shall not, however, be required to pay any tax which may
be payable in respect of any transfer involved in the issue and delivery of any
certificate in a name other than that of the Holder and the Company shall not be
required to issue or deliver any such certificate unless and until the person or
persons requesting the issue thereof shall have paid to the Company the amount
of such tax or shall have established to the satisfaction of the Company that
such tax has been paid.

         9. Transferability. The Warrant Units issued upon exercise of this
Warrant shall be subject to a stop transfer order and the certificate or
certificates evidencing such Warrant Units shall bear the following legend:

               "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
               REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
               "ACT"), OR ANY STATE SECURITIES LAWS AND NEITHER SUCH SECURITIES
               NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, PLEDGED, ASSIGNED
               OR OTHERWISE TRANSFERRED UNLESS (1) A REGISTRATION STATEMENT WITH
               RESPECT THERETO IS EFFECTIVE UNDER THE ACT AND ANY APPLICABLE
               STATE SECURITIES LAWS, OR (2) THE COMPANY RECEIVES AN OPINION OF
               COUNSEL TO THE HOLDER OF SUCH SECURITIES, WHICH COUNSEL AND
               OPINION ARE REASONABLY SATISFACTORY TO THE COMPANY, THAT SUCH
               SECURITIES MAY BE OFFERED, SOLD, PLEDGED, ASSIGNED OR TRANSFERRED
               IN THE MANNER CONTEMPLATED WITHOUT AN EFFECTIVE REGISTRATION
               STATEMENT UNDER THE ACT OR APPLICABLE STATE SECURITIES LAWS."


         This Warrant and the Future Warrant issued upon exercise hereof (and
the Common Stock underlying the Warrant Unit) may not be offered, sold, or
transferred except in compliance with the Act and in accordance with the
appropriate rules in the NASD and any applicable state securities laws; and then
only against receipt of an agreement of the Person to whom such offer or sale is
made to comply with the provisions of this Section 9 with respect to any resale
or other disposition of such securities; provided that no such agreement shall
be required from any Person purchasing this Warrant or any underlying security
pursuant to a registration statement effective under the Act. The Holder of this
Warrant agrees that, prior to the disposition of any security purchased on the
exercise hereof under circumstances that might require registration of such
security under the Act or any similar statute then in effect, the Holder shall
give written notice to the Company, expressing his intention as to such
disposition. Promptly upon receiving such



notice, the Company shall present a copy thereof to its securities counsel. If,
in the opinion of such counsel, the proposed disposition does not require
registration of such security under the Act, or any similar statute then in
effect, the Company shall, as promptly as practicable, notify the Holder of such
opinion, whereupon the Holder shall be entitled to dispose of such security in
accordance with the terms of the notice delivered by the Holder to the Company.
The above agreement by the Holder of this Warrant shall not be deemed to limit
or restrict in any respect the exercise of rights set forth in Section 9 hereof.


         10. Loss of Warrant. Upon receipt of evidence satisfactory to the
Company of the loss, theft, destruction, or mutilation of this Warrant (and upon
surrender of any Warrant if mutilated), including an affidavit of the Holder
that this Warrant has been lost, stolen, destroyed or mutilated, together with
an indemnity against any claim that may be made against the Company on account
of such lost, stolen, destroyed or mutilated Warrant, and upon reimbursement of
the Company's reasonable incidental expenses, the Company shall execute and
deliver to the Holder a new Warrant of like date, tenor, and denomination.

         11. No Stockholder Rights. The Holder of this Warrant shall not have
solely on account of such status, any rights of a stockholder of the Company,
either at law or in equity, or to any notice of meetings of stockholders or of
any other proceedings of the Company, except as provided in this Warrant.

         12. Governing Law. This Warrant shall be construed in accordance with
the laws of the State of New York applicable to contracts made and performed
within such State, without giving effect to conflicts of law principles.

         13. Consent to Jurisdictions. The Company irrevocably consents to the
jurisdiction of the courts of the State of New York and of any federal court
located in such State in connection with any action or proceeding arising out of
or relating to this Warrant, any document or instrument delivered pursuant to,
in connection with or simultaneously with this Warrant, or a breach of this
Warrant or any such document or instrument. In any such action or proceeding,
the Company waives personal service of any summons, complaint or other process
and agrees that service thereof may be made in accordance with Section 14
hereof. Within thirty (30) days after such service, or such other time as may be
mutually agreed upon in writing by the attorneys for the parties to such action
or proceeding, the Company shall appear to answer such summons, complaint or
other process.

         14. Notices. Any notice or other communication required or permitted to
be given hereunder shall be in writing and shall be mailed by certified mail,
return receipt requested, or by Federal Express, Express Mail or similar
overnight delivery or courier service or delivered (in person or by telecopy,
telex or similar telecommunications equipment) against receipt to the party to
whom it is to be given, (i) if to the Company, at its address at 350 Bedford
Street, Suite 203, Stamford, Connecticut 06901, Attention: President, (ii) if to
the Holder, at its address set forth on the first page hereof, or (iii) in
either case, to such other address as the party shall have furnished in writing
in accordance with the provisions of this Section 14. Notice to the estate of
any party shall be sufficient if addressed to the party as provided in this
Section 14. Any notice or other communication given by certified mail shall be
deemed given at the time of certification thereof,



except for a notice changing a party's address which shall be deemed given at
the time of receipt thereof. Any notice given by other means permitted by this
Section 14 shall be deemed given at the time of receipt thereof.

         15. Waiver. No course of dealing and no delay or omission on the part
of the Holder in exercising any right or remedy shall operate as a waiver
thereof or otherwise prejudice the Holder's rights, powers or remedies. No
right, power or remedy conferred by this Warrant upon the Holder shall be
exclusive of any other right, power or remedy referred to herein or now or
hereafter available at law, in equity, by statute or otherwise, and all such
remedies may be exercised singly or concurrently.

         16. Amendment. This Warrant may be amended only by a written instrument
executed by the Company and the Holder hereof. Any amendment shall be endorsed
upon this Warrant, and all future Holders shall be bound thereby.

         17. Captions. Paragraph captions contained in this Warrant are inserted
only as a matter of convenience and for reference and in no way define, limit or
extend or describe the scope of this Warrant or the intent of any provision
hereof.

Dated:              , 2004
       -------------

                                             MARC PHARMACEUTICALS, INC.


                                             By:
                                                --------------------------------
                                                Name: Robert M. Cohen
                                                Title: Chief Executive Officer,

                                                       Chief Financial Officer

                                                       and President


[Seal]


- -------------------------------
Robert M. Cohen, Secretary






                               FORM OF ASSIGNMENT

(To be executed by the registered holder if such holder desires to transfer the
attached Warrant.)


         FOR VALUE RECEIVED, ______________________ hereby sells, assigns, and
transfers unto ________________ a Warrant to purchase up to 2,000,000 Warrant
Units, of Marc Pharmaceuticals, Inc. (the "Company"), together with all right,
title, and interest therein, and does hereby irrevocably constitute and appoint
_________ ___________________ attorney to transfer such Warrant on the books of
the Company, with full power of substitution.


Dated:
      ---------------------

                                             Signature
                                                      --------------------------


                                             -----------------------------------
                                             Signature Guarantee





                                     NOTICE

         The signature on the foregoing Assignment must correspond to the name
as written upon the face of this Warrant in every particular, without alteration
or enlargement or any change whatsoever.









To: Marc Pharmaceuticals, Inc.
    350 Bedford Street
    Stamford, Connecticut 06901


                              ELECTION TO EXERCISE

         The undersigned hereby exercises his or its rights to purchase
_________ Warrant Units covered by the within Warrant and tenders payment
herewith in the amount of $ ___________ in accordance with the terms thereof,
and requests that certificates for such securities be issued in the name of, and
delivered to:


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

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

- ------------------------------------------------------------------------------
                    (Print Name, Address and Social Security
                          or Tax Identification Number)

and, if such number of Warrant Units shall not be all the Warrant Units covered
by the within Warrant, that a new Warrant for the balance of the Warrant Units
covered by the within Warrant be registered in the name of, and delivered to,
the undersigned at the address stated below.



Dated:
      ---------------------
                                            Name:
                                                 -------------------------------
                                                             (Print)


Address:
        ------------------------------------------------------------------------


                                            ------------------------------------
                                            (Signature)
                                            ------------------------------------
                                            (Signature Guarantee)

                                            ---------------------------
                                            (Signature Guarantee)





                                    EXHIBIT A