Document:

EXHIBIT 10.5
                                                                    ------------

                                 RxBAZAAR, INC.

                FORM OF 10% UNSECURED CONVERTIBLE PROMISSORY NOTE

         $__________                                        January 15, 2002

         For value received, the undersigned RxBazaar, Inc., a Delaware
corporation (the "Company"), promises to pay on the Maturity Date, as defined
hereinafter, to David Genecco (the "Holder"), the principal sum of __________
United States Dollars ($________), together with interest thereon, such interest
to be payable at such rates and such times as are hereinafter specified.

         This Note is part of a unit (the "Unit") issued by the Company
consisting of this Note and a warrant to purchase ________ shares of the common
stock, $0.001 par value per share, of the Company (the "Warrant"). Ownership of
this Note may not be separated from the Unit or the Warrant before the Maturity
Date.

         This Note is issued as part of a Unit pursuant to and as defined in
that certain Confidential Private Placement Memorandum dated November 30, 2001
(the "Placement Memorandum"), and subscription agreements by and between the
Company and the Holder and the other Investors party thereto (the "Subscription
Agreement"), and each holder of this Note, by his acceptance hereof, agrees to
be bound by the provisions of the Subscription Agreement. This Note is one of a
series of promissory notes in the maximum aggregate original principal amount of
$1,500,000 issued or to be issued as part of the Units pursuant to the Placement
Memorandum (the "Notes").

         The following is a statement of the rights of the Holder and the
conditions to which this Note is subject, and to which the Holder hereof, by the
acceptance of this Note, agrees:

         1. Interest and Principal

            1.01 Interest. The Company shall pay interest on the outstanding
principal amount of this Note from the date hereof until such principal amount
is paid in full at the rate of ten percent (10%) per annum or until the date of
conversion pursuant to Section 1.06 below. Interest shall accrue and shall be
due and payable on the earliest of (i) the second anniversary of the date of
issuance; or (ii) at the election of the holder, by written notice to the
Company in the manner provided in the Subscription Agreement, on the tenth
business day following the closing date of a private placement or firm
commitment underwritten initial public offering of the Company's securities in
which the gross proceeds equal or exceed $5,000,000 (the "Maturity Date").

            1.02 Principal. The entire outstanding principal together with
interest accrued thereon shall be due and payable on the Maturity Date.

            1.03 Prepayment. This Note may be prepaid at any time, at the
Company's option, by paying the entire amount of principal and interest accrued
thereon.

            1.04 Delivery of Payment. All payments made hereunder shall be made
by check mailed first class, postage paid to the Holder at the address set forth
next to the Holder's signature in the Subscription Agreement or to such other
address as the Holder may from time to time designate in writing
<PAGE>

to the Company pursuant to the Subscription Agreement. Such payments shall be
accompanied by a notice setting forth in reasonable detail (a) the amount of
interest and principal being paid and (b) the remaining principal amount, if
any. If any payment is required to be made on a day which is not a Business Day
(as hereinafter defined) the date on which such payment is required to be made
shall be extended to, and such payment shall be required to be made on, the next
Business Day. "Business Day" shall mean a day other than Saturday, Sunday and
any day which shall be in the City of Boston, Massachusetts, a legal holiday or
a day on which banking institutions are authorized by law to close.

            1.05 Withholding. If any part of the principal or interest payable
to the Holder under this Note shall be subject to withholding under U.S. federal
or state tax laws and regulations, the Company shall satisfy its payment
obligations under this Section 1 with respect to any such amount by withholding
and paying over to the Internal Revenue Service or such other taxing authority,
from any sums payable to Holder under this Note, any and all amounts required by
law to be so withheld.

            1.06 Conversion. If the Maturity Date has not occurred before the
date that is one year after the date on which the Company first becomes subject
to the reporting requirements under the Securities Exchange Act of 1934, as
amended, then the outstanding principal and accrued interest under this Note
shall thereafter be convertible at the option of the holder into shares of
common stock, $0.001 par value per share, of the Company ("Common Stock") at a
conversion price of 80% of the Current Market Price of the Common Stock on the
date of conversion. "Current Market Price" means, as of any date, the average,
for each of the 10 consecutive trading days immediately prior to such date, of
the last reported sale price of the Common Stock on such trading day as reported
(i) on the composite tape for the principal national securities exchange on
which the Common Stock may then be listed, or (ii) if the Common Stock shall not
be so listed, as reported by the Nasdaq Stock Market; or (iii) if the Common
Shares shall not be quoted on the Nasdaq Stock Market, as reported by the NASD
OTC Bulletin Board or the National Quotation Bureau, Inc., or any successor
organization. If the Current Market Price cannot be determined under any of the
foregoing methods, Current Market Price shall mean the fair value per share of
Common Stock on such date determined by the Board of Directors in good faith,
irrespective of any accounting treatment.

         2. Defaults and Remedies

            2.01 Events of Default. An "Event of Default" shall occur if:

            (a) the Company shall fail to pay the principal of or interest on
this Note on the Maturity Date;

            (b) the Company pursuant to or within the meaning of any Bankruptcy
Law (as defined below):

                (i) commences a voluntary case;

                (ii) consents to the entry of an order against it for relief in
an involuntary case; or

                (iii) makes a general assignment for the benefit of its
creditors; or

            (c) a court of competent jurisdiction enters an order or decree
under any Bankruptcy Law that:

                (i) is for relief against the Company in an involuntary case;

                                      -2-
<PAGE>

                (ii) appoints a Custodian (as hereinafter defined) for all or
substantially all of the assets of the Company; or

                (iii) orders a liquidation of the Company.

            The term "Bankruptcy Law" means Title 11, U.S. Code or any similar
federal or state law. The term "Custodian" means any receiver, trustee,
assignee, liquidator, or similar official under any Bankruptcy Law.

            2.02 Acceleration. If an Event of Default occurs and is continuing,
the holder of this Note may, by notice to the Company, declare the principal of
and accrued interest on this Note to be immediately due and payable.

            2.03 Other Remedies. If an Event of Default occurs and is
continuing, the holder of this Note may pursue any available remedy to collect
the payment of interest, principal or premium, if any, on this Note or to
enforce any provision of this Note. A delay or omission by the holder of this
Note in exercising any right or remedy accruing upon an Event of Default shall
not impair the right or remedy or constitute a waiver or acquiesce in the Event
of Default. All remedies are cumulative to the extent permitted by law.

         3. Subordination

            The indebtedness evidenced by this Note, and the payment of the
principal hereof, and any interest hereon, is wholly subordinated, junior and
subject in right of payment, to the extent and in the manner hereinafter
provided, to the prior payment of all Senior Indebtedness of the Company now
outstanding or hereinafter incurred. "Senior Indebtedness" means the principal,
interest and reasonable and customary charges and expenses arising out of or
relating to all indebtedness of the Company for monies borrowed from banks,
trust companies, insurance companies and other financial institutions, and
indebtedness thereto for any related costs, expenses and indemnities. This
Section 3 is and is intended solely for the purposes of defining the relative
rights of the Holder and the holders of Senior Indebtedness and nothing herein
shall impair, as between the Company and the Holder , the obligation of the
Company, which is unconditional and absolute, to pay to the Holder the principal
thereof and interest thereon, in accordance with the terms hereof, nor shall
anything herein prevent the Holder from exercising all remedies otherwise
permitted by applicable law or hereunder upon default, subject to the rights set
forth above of holders of Senior Indebtedness.

         4. Usury

            It is the intention of the parties hereto to conform strictly to
applicable usury laws now or hereafter in effect. In the event that any of the
terms or provisions of this Note are in conflict with applicable usury law this
Section 4 shall govern as to such terms or provisions, and this Note shall in
all other respects remain in full force and effect. If any transaction
contemplated hereby would be usurious, it is agreed that the aggregate of all
consideration which constitutes interest under applicable law that is contracted
for, charged or received under this Note shall under no circumstances exceed the
maximum interest allowed by applicable law. Accordingly, if interest in excess
of the legal maximum is contracted for, charged or received: (i) this Note shall
be automatically reformed so that the effective rate of interest shall be
reduced to the maximum rate of interest permitted by applicable law, for the
purpose of determining said rate and to the extent permitted by applicable law,
all interest contracted for, charged or received shall be amortized, prorated
and spread throughout the full term of this Note so that the effective rate of
interest is uniform throughout the life of this Note, and (ii) any excess of
interest over the

                                      -3-
<PAGE>

maximum amount allowed under applicable law shall be applied as a credit against
the then unpaid principal amount hereof.

         5.       Miscellaneous

            5.01 Waiver of Presentment, Etc. The undersigned hereby waives
presentment, demand for payment, notice of dishonor, and any and all other
notices or demands in connection with the delivery, acceptance, performance,
default or enforcement of this Note, and hereby consents to any extensions of
time, renewals, releases of any party to this Note, waivers or modifications
that may be granted or consented to by the Holder in respect to the time of
payment or any other provision of this Note. This Note has been issued by the
Company pursuant to the authorization of its board of directors providing for
the issuance of like Notes in an aggregate principal amount of $1,500,000.

            5.02 Holder as Deemed Owner. The Company may deem and treat the
registered holder hereof as the absolute owner of this Note (whether or not this
Note shall be overdue and notwithstanding any notice of ownership or writing
hereon made by anyone other than the Company) for the purpose of receiving
payment hereof or thereof or on account hereof and for all other purposes, and
the Company shall not be affected by notice to the contrary. The Company will
act as registrar for the Notes and any transfers of Notes may be made through
the Company in such capacity.

            5.03. Corporate Obligation. It is expressly understood that this
Note is solely a corporate obligation of the Company, and that any and all
personal liability, either at common law or in equity or by constitution or
statute, of, and any and all such rights and claims against, every promoter,
subscriber, incorporator, shareholder, officer or director, as such, are hereby
expressly waived and released by the holder hereof by the acceptance of this
Note and as a part of the consideration for the issue hereof.

            5.04 Required Consent. The Company may not modify any of the terms
of the Note without the prior written consent of the holders of Notes
representing a majority of the original principal amount of the Notes.

            5.05 Lost Documents. Upon receipt by the Company of evidence
satisfactory to it of the loss, theft, destruction or mutilation of this Note or
any Note exchanged for it, and (in the case of loss, theft or destruction) of
indemnity satisfactory to it, and upon reimbursement to the Company of all
reasonable expenses incidental thereto, and upon surrender and cancellation of
such Note, if mutilated, the Company will make and deliver in lieu of such Note
a new Note of like tenor and unpaid principal amount and dated as of the
original date of the Note.

            5.06 Governing Law. THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS (EXCLUSIVE OF THE LAWS GOVERNING CONFLICTS OF LAWS) OF
THE COMMONWEALTH OF MASSACHUSETTS.

                                                     RxBAZAAR, INC.

                                                     By: /s/ C. Robert Cusick
                                                         -----------------------
                                                     Chief Executive Officer

                                      -4-EXHIBIT 10.6
                                                                    ------------

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE BEEN ACQUIRED FOR INVESTMENT
AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE "ACT") OR THE
SECURITIES LAWS OF ANY STATE. SUCH WARRANT AND SHARES MAY NOT BE OFFERED FOR
SALE, SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF EFFECTIVE
REGISTRATION STATEMENTS COVERING SUCH WARRANT AND SHARES UNDER THE ACT AND ANY
APPLICABLE STATE SECURITIES LAWS, UNLESS AN EXEMPTION FROM SUCH REGISTRATION IS
AVAILABLE.

                          COMMON STOCK PURCHASE WARRANT

Warrant No. CS-                                      Right to Purchase Shares of
                                                     Common Stock of
                                                     RxBazaar.com, Inc.

                               RXBAZAAR.COM, INC.

         For value received and subject to the terms and conditions hereinafter
set out, DynaGen, Inc. (the "Holder") or any subsequent registered holder hereof
is entitled upon surrender of this Warrant, with the subscription form annexed
hereto duly executed, at the office of RxBazaar.com, Inc., a Delaware
corporation, 11895 Kemper Springs Drive, Cincinnati, Ohio 45240-1635
(hereinafter with its successors called the "Company"), or such other office as
the Company shall notify to the registered holder hereof in writing, to purchase
1,200,000 (the "Warrant Number") shares of fully paid and nonassessable shares
of Common Stock, par value $.001 per share of the Company (the "Common Stock")
at a purchase price per share of $2.50 (the "Exercise Price"). This Warrant may
be exercised in part, and the registered 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. The person or persons in whose name or names any
certificate representing shares of Common Stock is issued hereunder shall be
deemed to have become the holder of record of the shares represented thereby as
at the close of business on the date on which this Warrant is exercised with
respect to such shares, whether or not the transfer books of the Company shall
be closed. Until such time as this Warrant is exercised or expires, the Exercise
Price payable and the securities issuable upon exercise of this Warrant are
subject to adjustment as hereinafter provided.

         1. This Warrant shall expire upon the earlier to occur of (a) the close
of business on the date that is five (5) years from the date of issuance, or (b)
the effective date of the merger of the Company with or into, the consolidation
of the Company with, or the sale by the Company of all or substantially all of
its assets or all or substantially all of its shares to another corporation or
other entity (other than such a transaction wherein the shareholders of the
Company retain or obtain a majority of the voting capital stock of the
surviving, resulting or purchasing corporation), and shall be void thereafter.

         2. The Company covenants that it will at all times reserve and keep
available a number of its authorized shares of its Common Stock, free from all
pre-emptive rights therein, which will be sufficient to permit the exercise of
this Warrant. The Company further covenants that such shares as may be issued
pursuant to the exercise of this Warrant will, upon issuance, be
<PAGE>

duly and validly issued, fully paid and nonassessable and free from all taxes,
liens and charges with respect to the issue thereof.

         3. If the Company shall at any time prior to the expiration of this
Warrant subdivide its outstanding Common Stock, by stock split or otherwise, or
combine its outstanding Common Stock, or issue additional shares of its Common
Stock in payment of a stock dividend in respect of its Common Stock, the Warrant
Number shall forthwith be proportionately increased in the case of a subdivision
or stock dividend, or proportionately decreased in the case of a combination,
and the Exercise Price then applicable to shares covered by the unexercised
portion of this Warrant shall forthwith be proportionately decreased in the case
of a subdivision or stock dividend, or proportionately increased in the case of
a combination.

         4. In case of any reclassification, capital reorganization, or change
of the outstanding Common Stock of the Company (other than as a result of a
subdivision, combination or stock dividend), at any time prior to the expiration
of this Warrant, then, as a condition of such reclassification, reorganization,
or change, lawful provision shall be made, and duly executed documents
evidencing the same from the Company or its successor shall be delivered to the
registered holder of this Warrant, so that the registered holder of the Warrant
shall have the right prior to the expiration of this Warrant to purchase, at a
total price not to exceed that payable upon the exercise of the unexercised
portion of this Warrant, the kind and amount of shares of stock and other
securities and property receivable upon such reclassification, reorganization,
or change, by a holder of the number of shares of Common Stock of the Company
which might have been purchased by the registered holder of this Warrant
immediately prior to such reclassification, reorganization or change, and in any
such case appropriate provisions shall be made with respect to the rights and
interest of the registered holder of this Warrant to the end that the provisions
hereof (including without limitation, provisions for the adjustment of the
Exercise Price and of the number of shares purchasable upon exercise of this
Warrant) shall thereafter be applicable in relation to any shares of stock and
other securities and property thereafter deliverable upon exercise hereof.

         5. No fractional shares or scrip representing fractional shares shall
be issued upon the exercise of this Warrant or any portion thereof. With respect
to any fraction of a share called for upon the exercise of this Warrant or any
portion thereof, an amount equal to such fraction multiplied by the then current
value of a share of Common Stock (as determined in good faith by the Board of
Directors of the Company) shall be paid to the holder hereof in cash by the
Company.

         6. Whenever the Exercise Price is adjusted as herein provided, the
Company shall promptly deliver to the registered holder of this Warrant a
certificate of its Principal financial officer setting forth the Exercise Price
after such adjustment and a brief statement of the facts requiring such
adjustment.

         7. In lieu of exercising this Warrant, the Holder may elect to receive
shares of Common Stock equal to the value of this Warrant (or the portion
thereof being canceled) by surrender of this Warrant at the principal office of
the Company together with notice of such election, in which event the Company
shall issue to the Holder a number of shares of Common Stock using the following
formula:

                                      -2-
<PAGE>

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

         Where  X - The number of shares of Common Stock to be issued to the
                    Holder upon exercising under this Paragraph 7.

                Y - The Warrant Number.

                A - The fair market value of one share.

                B - The Exercise Price.

For purposes of this provision, the fair market value of the shares of Common
Stock of the Company shall mean the average of the closing bid and asked prices
of the shares quoted in the Over-The-Counter Market Summary or the closing price
quoted in any exchange on which the shares are listed, whichever is applicable,
as published in the Wall Street Journal for the ten (10) trading days prior to
the date of determination of fair market value. If the shares are not traded
Over-The-Counter or on an exchange, the fair market value shall be the price per
share that the Company could obtain from a willing buyer for shares sold by the
Company from authorized but unissued shares, as such price shall be agreed by
the Board of Directors and the Holder.

         8. If at any time prior to the expiration or exercise of this Warrant,
the Company shall pay any dividend or make any distribution upon its Common
Stock or shall make any subdivision or combination of or other change in its
Common Stock, the Company shall cause notice thereof to be mailed, first class,
postage prepaid, to the registered holder of this Warrant at least ten (10) full
business days prior to the date as of which holders of Common Stock who shall
participate in such dividend, distribution, subdivision, combination or other
change are to be determined. Such notice shall also specify the time as of which
holders of Common Stock who shall participate in such event are to be
determined. Failure to give such notice, or any defect therein, shall not affect
the legality or validity of any such event.

         9. (a) The Company will maintain a register containing the names and
addresses of the holders of the Warrants. The "registered holder" of any Warrant
shall be the person in whose name such Warrant is registered in said warrant
register. Any registered holder of this Warrant may change his or her address as
shown on the warrant register by written notice to the Company requesting such
change. Any notice or written communication required or permitted to be given to
the registered holder may be delivered or given by mail to such registered
holder at its address as shown on the warrant register.

            (b) This Warrant, and the rights evidenced hereby, may, subject to
the provisions hereof, be transferred by any registered holder hereof with
respect to any or all of the shares purchasable hereunder. Upon presentation to
the Company of this Warrant together with the assignment form hereof properly
endorsed for registration of transfer as an entirety, the Company shall issue a
new warrant of the same denomination to the assignee. Upon presentation to the
Company of this Warrant together with the assignment form hereof properly
endorsed for registration of transfer with respect to a portion of the shares
purchasable hereunder, the Company shall issue a new warrant to the assignee, in
such denomination as shall be requested

                                      -3-
<PAGE>

by the registered holder hereof, and shall issue to such registered holder a new
warrant covering the number of shares in respect of which this Warrant shall not
have been transferred.

            (c) In case this Warrant shall be mutilated, lost, stolen or
destroyed, the Company may issue a new warrant of like tenor and denomination
and deliver the same (i) in exchange and substitution for and upon surrender and
cancellation of any mutilated Warrant, or (ii) in lieu of any Warrant lost,
stolen or destroyed, upon receipt of evidence reasonably satisfactory to the
Company of the loss, theft or destruction of such Warrant (including a
reasonably detailed affidavit with respect to the circumstances of any loss,
theft or destruction) and of indemnity reasonably satisfactory to the Company.

         10. Subject to compliance with applicable Federal and state securities
laws, this Warrant and all rights hereunder is transferable in whole or in part,
at the office or agency of the Company at which this Warrant together with the
assignment hereof on the books of the Company. The Company may treat the
registered holder hereof as the owner hereof for all purposes.

         11. The registered holder of this Warrant, by acceptance of this
Warrant, covenants and agrees that it is (a) acquiring this Warrant for its own
account for investment and not with a view to, or for sale in connection with,
any distribution hereof or of the shares of Common Stock issuable upon exercise
hereof and with no present intention of offering and distributing this Warrant
or the shares of Common Stock issuable upon exercise of this Warrant, and (b) an
accredited investor within the meaning of Regulation D under the Securities Act
of 1933, as amended.

         12. Unless a current registration statement under the Securities Act of
1933, as amended, shall be in effect with respect to the securities to be issued
upon exercise of this Warrant, the registered holder hereof, by accepting this
Warrant, covenants and agrees that, at the time of exercise hereof, and at the
time of any proposed transfer of securities acquired upon exercise hereof, such
registered holder will deliver to the Company a written statement that the
securities acquired by the registered holder upon exercise hereof are for the
account of the registered holder or are being held by the registered holder as
trustee, investment manager, investment advisor or as any other fiduciary for
the account of the beneficial owner or owners for investment and are not
acquired with a view to, or for sale in connection with, any distribution
thereof (or any portion thereof) and with no present intention (at any such
time) of offering and distributing such securities (or any portion thereof).
Further, the registered holder shall comply with such provisions of applicable
state securities laws as counsel to the Company or other counsel reasonably
acceptable to the Company shall advise.

         13. Any term of this Warrant may be amended and the observance of any
term of this Warrant may be waived (either generally or in a particular instance
and either retroactively or prospectively) with the written consent of the
Company and the registered holder of this Warrant. No waivers of or exceptions
to any term, condition or provision of this Warrant, in any one or more
instances, shall be deemed to be, or construed as, a further or continuing
waiver of any such term, condition or provision.

                                      -4-
<PAGE>

         14. The provisions and terms of this Warrant shall be construed in
accordance with the laws of the Commonwealth of Massachusetts.

                                            RXBAZAAR.COM, INC.

                                            By: /s/ Bruce Warwick
                                                -------------------------
                                                 Secretary

                                            Dated: September 29, 2000

                                      -5-
<PAGE>

                              FORM OF SUBSCRIPTION

        (To be signed only on exercise of Common Stock Purchase Warrant)

TO: RXBAZAAR.COM, INC.

         The undersigned, the registered holder of the within Common Stock
Purchase Warrant of RXBAZAAR.COM, INC., hereby irrevocably elects to exercise
this Common Stock Purchase Warrant for, and to purchase thereunder, ___________*
shares of Common Stock of RXBAZAAR.COM, INC., and the undersigned 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:________________                 ________________________________________
                                       (Signature  must conform in all respects
                                       to name of registered  holder as
                                       specified on the face of the Warrant)

Signed in the presence of:

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

         *Insert here the number of shares (all or part of the number of shares
called for in the Common Stock Purchase Warrant) as to which the Common Stock
Purchase Warrant is being exercised without making any adjustment for any other
stock or other securities or property or cash which, pursuant to the adjustment
provisions of the Common Stock Purchase Warrant, may be deliverable on exercise.

                                      -6-
<PAGE>

                               FORM OF ASSIGNMENT

        (To be signed only on transfer of Common Stock Purchase Warrant)

         For value received, the undersigned hereby sells, assigns, and
transfers unto _________________________ the right represented by the within
Common Stock Purchase Warrant to purchase _____________________ shares of Common
Stock of RXBAZAAR.COM, INC. to which the within Common Stock Purchase Warrant
relates, and appoints such person Attorney to transfer such right on the books
of RXBAZAAR.COM, INC. with full power of substitution in the premises.

Dated:________________                 ________________________________________
                                       (Signature  must conform in all respects
                                       to name of registered  holder as
                                       specified on the face of the Warrant)

Signed in the presence of:

----------------------                 ----------------------------------------
                                       (Address)

                                      -7-

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