AyurCore, Inc.
                                   PROMISSORY NOTE

                                                                March 24, 1998

     FOR VALUE RECEIVED, AyurCore, Inc., a Delaware Corporation
     ("Borrower"), promises to pay to the order of Sanjeev Chitre
     ("Lender"), the principal amount of $279,655.84, together with
     interest on the unpaid principal balance thereof from the respective
     dates Lender loaned such amounts to the Borrower as set forth on
     Schedule A attached hereto to the date such balance is paid, at the
     prime rate shown in the Western Edition of the Wall Street Journal,
     plus 2% annum.  Interest shall be due and payable on June 30 and
     December 31, of each year.  Principal shall be due on demand from and
     after the respective maturity dates set forth on Schedule A; provided,
     however, that if Borrower shall conclude a debt or equity financing of
     $500,000 or more at any time after the date hereof and prior to the
     date any principal amount hereunder shall otherwise become due and
     payable, such unpaid principal and accrued interest hereunder shall be
     payable on the fifth business day after the closing of such financing.

     If any one or more of the following events ("Events of Default") shall
     occur:

          (a)  Borrower shall fail to pay any amount under this Promissory
          Note when the same shall become due and payable, whether at
          maturity or by acceleration or otherwise; or

          (b)  (i)  the Borrower shall commence any action (A) under any
          law relating to bankruptcy, insolvency, reorganization or relief
          of debtors, seeking to have an order for relief entered with
          respect to the Borrower or its debts or (B) seeking appointment
          of a custodian, receiver or similar officer for the Borrower or
          any substantial part of its property; or (ii) any action of a
          nature referred to above shall be commenced against the Borrower
          and results in an order for relief or is not dismissed,
          discharged or fully bonded within 30 days; or (iii) there shall
          be commenced against the Borrower any action seeking attachment,
          execution or similar process against any substantial part of the
          Borrower's property, which action is not within 30 days
          discharged or stayed or fully bonded; or (iv) the Borrower shall,
          by act or omission, indicate its consent to or acquiescence in
          any of the foregoing, without regard to the grace periods set
          forth above; or (v) the Borrower shall be unable, or admit in
          writing, inability to pay the Borrower's debts as they become
          due; or (vi) the Borrower shall transfer or conceal its property
          within intent to hinder, delay or defraud any creditors or to
          benefit any class of creditors or creditors generally or shall
          suffer for 30 days or longer while insolvent any lien on the
          Borrower's property resulting from judicial proceedings; or

          (c)  the dissolution or other winding up of the Borrower;
 



     then, in such event and at any time thereafter, if such event shall
     then be continuing, Lender may, at its option upon written notice to
     Borrower, declare this Promissory Note to be due an payable, whereupon
     (or without the necessity for such notice in the case of any event
     described in clause (i) or (ii) of paragraph (b) above) the entire
     balance of this Promissory Note shall forthwith become and be due and
     payable.

     Except as otherwise hereinabove expressly provided, Borrower hereby
     waives diligence, demand, protest, presentment and all notices
     (whether of nonpayment, dishonor, protest, acceleration or otherwise)
     and consents to acceleration of the time of payment and to surrender,
     substitution or any other action or inaction with respect to security
     and to forbearance and to other indulgence, all without notice. 
     Failure of Lender to assert any right herein shall not be deemed a
     waiver thereof.

     The Borrower shall have the right, at any time, to prepay without
     penalty all of this Promissory Note together with accrued interest
     thereon.

     Lender shall not assign its rights hereunder without the prior written
     consent of Borrower.

     This Promissory Note supersedes in all respects the Promissory Note
     dated as of January 29, 1998 issued by the Borrower in favor of the
     Lender.

     This Promissory Note shall be governed by and construed in accordance
     with the laws of the State of New York applicable to contracts made
     and to be performed wholly within such State.

     IN WITNESS WHEREOF, the Borrower has signed this Promissory Note as of
     the date first written above.


                                         AyurCore, Inc.

                                         By:    s/ Nina Renaud               
                                                ----------------------------
                                                Nina Renaud, Chief Financial
                                                 Officer             
                                                Authorized Signatory 




                                      SCHEDULE A
                                Chitre Promissory Note




                                             
                    Principal Amount Loaned
Date                by Lender to Borrower         Maturity Date

1/15/96             $25,000                       1/15/97
8/15/96             $38,000                       8/15/97
9/5/96              $6,300                        9/5/97
9/17/96             $6,150                        9/17/97
9/30/96             $4,000                        9/30/97
10/8/96             $8,000                        10/8/97
10/11/96            $4,250                        10/11/97
10/23/96            $25,000                       10/23/97
2/20/97             $25,000                       2/20/98
3/20/97             $25,000                       3/20/98
5/28/97             $15,000                       5/28/98
6/15/97             $5,500                        6/15/98
6/29/97             $2,500                        6/29/98
7/14/97             $15,000                       7/14/98
12/16/97            $25,000                       12/16/98
1/21/98             $11,380.84                    1/21/99
1/29/98             $10,000                       1/29/99
3/24/98             $28,575                       3/24/99

                    $279,655.84                   






                                             May 26, 1998


Deepa Chitre
Chief Executive Officer
AyurCore, Inc.
1737 N. First Street, Suite 290
San Jose, California 95112


Dear Mrs. Chitre:

         Reference is hereby made to that certain Promissory Note, dated as of
March 24, 1998, made by AyurCore, Inc. ("AyurCore") in favor of Sanjeev Chitre
(the "Note). In order to facilitate AyurCore's contemplated initial public
offering (the "Offering"), the undersigned hereby agrees that no payments shall
be due or payable under the Note prior to the first anniversary of the
consummation of the Offering; provided, however, that this agreement shall be of
no further force or effect if the Offering shall not be consummated by 
August 1, 1998.




                                             s/ Sanjeev Chitre
                                             ------------------
                                             Sanjeev Chitre