Document:

EXHIBIT 10.18

                            INVESTOR RIGHTS AGREEMENT

         This Investor Rights Agreement is made and entered into as of January
31, 2006 (this "Agreement"), among Somanta Pharmaceuticals, Inc., a Delaware
corporation (the "Company"), and each of the purchasers executing this Agreement
and listed on Schedule 1 attached hereto, as such schedule may be supplemented
pursuant to Section 7(h) below (collectively, the "Purchasers").

         This Agreement is being entered into pursuant to the Preferred Stock
and Warrant Purchase Agreement dated as of the date hereof, by and among the
Company and the Purchasers (the "Purchase Agreement").

         The Company and the Purchasers hereby agree as follows:

         1.       Certain Definitions.

         Capitalized terms used and not otherwise defined herein shall have the
meanings given such terms in the Purchase Agreement. As used in this Agreement,
the following terms shall have the following meanings:

         "Additional Closing" shall have the meaning assigned in Section 2.1(c)
of the Purchase Agreement.

         "Advice" shall have the meaning set forth in Section 3(m).

         "Affiliate" means, with respect to any Person, any other Person that
directly or indirectly controls or is controlled by or under common control with
such Person. For the purposes of this definition, "control," when used with
respect to any Person, means the possession, direct or indirect, of the power to
direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities, by contract or otherwise;
and the terms of "affiliated," "controlling" and "controlled" have meanings
correlative to the foregoing.

         "Blackout Period" shall have the meaning set forth in Section 3(n).

         "Board" shall have the meaning set forth in Section 3(n).

         "Business Day" means any day except Saturday, Sunday and any day which
shall be a legal holiday or a day on which banking institutions in the State of
New York generally are authorized or required by law or other government actions
to close.

         "Commission" means the Securities and Exchange Commission.

         "Common Stock" means the Company's Common Stock, par value $0.001 per
share, and any securities into which such common stock may hereafter be
reclassified.
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         "Conversion Shares" means the shares of Common Stock issued or issuable
upon conversion of the Preferred Stock.

         "Effectiveness Period" shall have the meaning set forth in Section 2.

         "Event" shall have the meaning set forth in Section 7(e).

         "Exchange Act" means the Securities Exchange Act of 1934, as amended.

         "Filing Date" means the 30th day following the Initial Closing Date.

         "Holder" or "Holders" means the holder or holders, as the case may be,
from time to time of Registrable Securities, including without limitation the
Purchasers and their assignees.

         "Indemnified Party" shall have the meaning set forth in Section 5(c).

         "Indemnifying Party" shall have the meaning set forth in Section 5(c).

         "Losses" shall have the meaning set forth in Section 5(a).

         "Person" means an individual or a corporation, partnership, trust,
incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or political subdivision
thereof) or other entity of any kind.

         "Preferred Stock" means the Series A Convertible Preferred Stock of the
Company, par value $0.001 per share, issued pursuant to the Purchase Agreement,
whether at the Initial Closing or an Additional Closing.

         "Proceeding" means an action, claim, suit, investigation or proceeding
(including, without limitation, an investigation or partial proceeding, such as
a deposition), whether commenced or threatened.

         "Prospectus" means the prospectus included in any Registration
Statement (including, without limitation, a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with
respect to the terms of the offering of any portion of the Registrable
Securities covered by such Registration Statement, and all other amendments and
supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference in such Prospectus.

          "Registrable Securities" means (a) the Conversion Shares and the
Warrant Shares (without regard to any limitations on beneficial ownership
contained in the Certificate of Designation or Warrants and including, without
limitation Conversion Shares and Warrant Shares issued in connection with an
Additional Closing) or other securities issued or issuable to each Purchaser or
its transferee or designee (i) upon conversion of the Preferred Stock and/or
upon exercise of the Warrants, or (ii) upon any distribution with respect to,

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any exchange for or any replacement of such Preferred Stock, Conversion Shares,
Warrants or Warrant Shares or (iii) upon any conversion, exercise or exchange of
any securities issued in connection with any such distribution, exchange or
replacement; (b) securities issued or issuable upon any stock split, stock
dividend, recapitalization or similar event with respect to the foregoing; and
(c) any other security issued as a dividend or other distribution with respect
to, in exchange for, in replacement or redemption of, or in reduction of the
liquidation value of, any of the securities referred to in the preceding
clauses; provided, however, that such securities shall cease to be Registrable
Securities when such securities have been sold to or through a broker or dealer
or underwriter in a public distribution or a public securities transaction or
when such securities may be sold without any restriction pursuant to Rule 144(k)
as determined by the counsel to the Company pursuant to a written opinion
letter, addressed to the Company's transfer agent to such effect as described in
Section 2 of this Agreement.

         "Registration Statement" means the registration statements and any
additional registration statements contemplated by Section 2, including (in each
case) the Prospectus, amendments and supplements to such registration statement
or Prospectus, including pre- and post-effective amendments, all exhibits
thereto, and all material incorporated by reference in such registration
statement.

         "Rule 144" means Rule 144 promulgated by the Commission pursuant to the
Securities Act, as such Rule may be amended from time to time, or any similar
rule or regulation hereafter adopted by the Commission having substantially the
same effect as such Rule.

         "Rule 158" means Rule 158 promulgated by the Commission pursuant to the
Securities Act, as such Rule may be amended from time to time, or any similar
rule or regulation hereafter adopted by the Commission having substantially the
same effect as such Rule.

         "Rule 415" means Rule 415 promulgated by the Commission pursuant to the
Securities Act, as such Rule may be amended from time to time, or any similar
rule or regulation hereafter adopted by the Commission having substantially the
same effect as such Rule.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Special Counsel" means Wiggin and Dana LLP.

         "Warrants" means the Common Stock purchase warrants issued pursuant to
the Purchase Agreement, including without limitation any such warrants issued at
an Additional Closing and the Placement Agent Warrants.

         "Warrant Shares" means the shares of Common Stock issuable upon the
exercise of the Warrants (including, without limitation, the Placement Agent
Warrants) issued or to be issued to the Purchasers or their assignees or
designees in connection with the offering consummated under the Purchase
Agreement.

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         2.       Registration. As soon as possible following the Initial
Closing Date (but not later than the Filing Date), the Company shall prepare and
file with the Commission a "shelf" Registration Statement covering all
Registrable Securities for a secondary or resale offering to be made on a
continuous basis pursuant to Rule 415. The Registration Statement shall be on
Form S-3 (or if such form is not available to the Company on Form SB-2 or
another form appropriate for such registration in accordance herewith). The
Company shall use its best efforts to cause the Registration Statement to be
declared effective under the Securities Act not later than ninety (90) days
after the Initial Closing Date (including filing with the Commission a request
for acceleration of effectiveness in accordance with Rule 461 promulgated under
the Securities Act within five (5) Business Days of the date that the Company is
notified (orally or in writing, whichever is earlier) by the Commission that a
Registration Statement will not be "reviewed," or not be subject to further
review) and to keep such Registration Statement continuously effective under the
Securities Act, subject to Section 3(n) hereof, until such date as is the
earlier of (x) the date when all Registrable Securities covered by such
Registration Statement have been sold or (y) with respect to any Holder, such
time as all Registrable Securities held by such Holder may be sold without any
restriction pursuant to Rule 144(k) as determined by the counsel to the Company
pursuant to a written opinion letter addressed to the Company's transfer agent
to such effect (the "Effectiveness Period"). For purposes of the obligations of
the Company under this Agreement, no Registration Statement shall be considered
"effective" with respect to any Registrable Securities unless such Registration
Statement lists the Holders of such Registrable Securities as "Selling
Stockholders" and includes such other information as is required to be disclosed
with respect to such Holders to permit them to sell their Registrable Securities
pursuant to such Registration Statement, unless any such Holder is not included
as a "Selling Stockholder" pursuant to Section 3(m). Such Registration Statement
also shall cover, to the extent allowable under the Securities Act and the Rules
promulgated thereunder (including Securities Act Rule 416), such indeterminate
number of additional shares of Common Stock resulting from stock splits, stock
dividends or similar transactions with respect to the Registrable Securities.

         3.       Registration Procedures.

         In connection with the Company's registration obligations hereunder,
the Company shall:

         (a) Prepare and file with the Commission on or prior to the Filing
Date, a Registration Statement on Form S-3 (or if such form is not available to
the Company on Form SB-2 or another form appropriate for such registration in
accordance herewith) (which shall include a Plan of Distribution substantially
in the form of Exhibit A attached hereto), and cause the Registration Statement
to become effective and remain effective as provided herein; provided, however,
that not less than three (3) Business Days prior to the filing of the
Registration Statement or any related Prospectus or any amendment or supplement
thereto, the Company shall (i) furnish to the Special Counsel, copies of all
such documents proposed to be filed, which documents (other than those
incorporated by reference) will be subject to the review of such Special
Counsel, and (ii) at the request of any Holder cause its officers and directors,
counsel and independent certified public accountants to respond to such
inquiries as shall be necessary, in the reasonable opinion of counsel to such

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Holders, to conduct a reasonable investigation within the meaning of the
Securities Act. The Company shall not file the Registration Statement or any
such Prospectus or any amendments or supplements thereto to which the Holders of
a majority of the Registrable Securities or the Special Counsel shall reasonably
object within three (3) Business Days after their receipt thereof; provided,
however, that if the Registration Statement is provided to the Special Counsel
and in the reasonable opinion of counsel to the Company complies with the
requirements of this Agreement and is ready to be filed with the Commission,
then no liquidated damages shall accrue with respect to any delay in filing
after the Filing Date that results from such objection and the Effectiveness
Date will be correspondingly extended by the number of days of delay after the
Filing Date resulting from such objection. In the event of any such objection,
the Holders shall provide the Company with any and all requested revisions to
such prospectus or supplement within two (2) Business Days of such objection.

         (b)      (i) Prepare and file with the Commission such amendments,
including post-effective amendments, to the Registration Statement and the
Prospectus in connection therewith as may be necessary to keep the Registration
Statement continuously effective as to the applicable Registrable Securities for
the Effectiveness Period and to the extent any Registrable Securities
(including, without limitation, any Registrable Securities issued from time to
time as dividends or distributions with respect to the Preferred Stock or other
Registrable Securities) are not included in such Registration Statement for
reasons other than the failure of the Holder to comply with Section 3(m) hereof
(including, without limitation, Registrable Securities issued in connection with
an Additional Closing), shall prepare and file with the Commission such
amendments to the Registration Statement or such additional Registration
Statements in order to register for resale under the Securities Act all
Registrable Securities; (ii) cause the related Prospectus to be amended or
supplemented by any required Prospectus supplement, and as so supplemented or
amended to be filed pursuant to Rule 424 (or any similar provisions then in
force) promulgated under the Securities Act; (iii) respond as promptly as
possible, and in no event later than ten (10) Business Days to any comments
received from the Commission with respect to the Registration Statement or any
amendment thereto and as promptly as reasonably possible provide the Holders
true and complete copies of all correspondence from and to the Commission
relating to the Registration Statement, but not, without the prior written
consent of the Holders, any comments that would result in the disclosure to the
Holders of material and non-public information concerning the Company; and (iv)
comply in all material respects with the provisions of the Securities Act and
the Exchange Act with respect to the disposition of all Registrable Securities
covered by the Registration Statement during the applicable period in accordance
with the intended methods of disposition by the Holders thereof set forth in the
Registration Statement as so amended or in such Prospectus as so supplemented.

         (c)      Notify Holders of Registrable Securities to be sold and the
Special Counsel as promptly as possible (A) when a Prospectus or any Prospectus
supplement or post-effective amendment to the Registration Statement is proposed
to be filed (but in no event in the case of this subparagraph (A), less than
three (3) Business Days prior to date of such filing); (B) when the Commission
notifies the Company whether there will be a "review" of such Registration
Statement and whenever the Commission comments in writing on such Registration
Statement; and (C) with respect to the Registration Statement or any
post-effective amendment, when the same has become effective, and after the

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effectiveness thereof: (i) of any request by the Commission or any other Federal
or state governmental authority for amendments or supplements to the
Registration Statement or Prospectus or for additional information; (ii) of the
issuance by the Commission of any stop order suspending the effectiveness of the
Registration Statement covering any or all of the Registrable Securities or the
initiation of any Proceedings for that purpose; (iii) of the receipt by the
Company of any notification with respect to the suspension of the qualification
or exemption from qualification of any of the Registrable Securities for sale in
any jurisdiction, or the initiation or threatening of any Proceeding for such
purpose; and (iv) if the financial statements included in the Registration
Statement become ineligible for inclusion therein or of the occurrence of any
event that makes any statement made in the Registration Statement or Prospectus
or any document incorporated or deemed to be incorporated therein by reference
untrue in any material respect or that requires any revisions to the
Registration Statement, Prospectus or other documents so that, in the case of
the Registration Statement or the Prospectus, as the case may be, it will not
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary to make the statements therein,
in the light of the circumstances under which they were made, not misleading.
Without limitation to any remedies to which the Holders may be entitled under
this Agreement, if any of the events described in Section 3(c)(C)(i),
3(c)(C)(ii) and 3(c)(C)(iii) occur, the Company shall use its best efforts to
respond to and correct the event.

         (d)      Use its best efforts to avoid the issuance of, or, if issued,
use best efforts to obtain the withdrawal of, (i) any order suspending the
effectiveness of the Registration Statement or (ii) any suspension of the
qualification (or exemption from qualification) of any of the Registrable
Securities for sale in any jurisdiction, at the earliest practicable time.

         (e)      If requested by any Holder of Registrable Securities, (i)
promptly incorporate in a Prospectus supplement or post-effective amendment to
the Registration Statement such information as the Company reasonably agrees
should be included therein and (ii) make all required filings of such Prospectus
supplement or such post-effective amendment as soon as practicable after the
Company has received notification of the matters to be incorporated in such
Prospectus supplement or post-effective amendment.

         (f)      Furnish to each Holder and the Special Counsel, without
charge, at least one conformed copy of each Registration Statement and each
amendment thereto, including financial statements and schedules, and all
exhibits to the extent requested by such Person (including those previously
furnished or incorporated by reference) promptly after the filing of such
documents with the Commission.

         (g)      Promptly deliver to each Holder and the Special Counsel,
without charge, as many copies of the Prospectus or Prospectuses (including each
form of prospectus) and each amendment or supplement thereto as such Persons may
reasonably request; and the Company hereby consents to the use of such
Prospectus and each amendment or supplement thereto by each of the selling
Holders in connection with the offering and sale of the Registrable Securities
covered by such Prospectus and any amendment or supplement thereto.

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         (h)      Prior to any public offering of Registrable Securities, use
its best efforts to register or qualify or cooperate with the selling Holders
and the Special Counsel in connection with the registration or qualification (or
exemption from such registration or qualification) of such Registrable
Securities for offer and sale under the securities or Blue Sky laws of such
jurisdictions within the United States as any Holder requests in writing, to
keep each such registration or qualification (or exemption therefrom) effective
during the Effectiveness Period and to do any and all other acts or things
necessary or advisable to enable the disposition in such jurisdictions of the
Registrable Securities covered by a Registration Statement; provided, however,
that the Company shall not be required to qualify generally to do business in
any jurisdiction where it is not then so qualified or to take any action that
would subject it to general service of process in any jurisdiction where it is
not then so subject or subject the Company to any material tax in any such
jurisdiction where it is not then so subject.

         (i)      Cooperate with the Holders to facilitate the timely
preparation and delivery of certificates representing Registrable Securities to
be sold pursuant to a Registration Statement, which certificates shall be free,
to the extent permitted by applicable law and the Purchase Agreement, of all
restrictive legends, and to enable such Registrable Securities to be in such
denominations and registered in such names as any Holder may request at least
two (2) Business Days prior to any sale of Registrable Securities. In connection
therewith, the Company shall promptly after the effectiveness of the
Registration Statement cause an opinion of counsel to be delivered to and
maintained with its transfer agent, together with any other authorizations,
certificates and directions required by the transfer agent, which authorize and
direct the transfer agent to issue such Registrable Securities without legend
upon sale by the Holder of such shares of Registrable Securities under the
Registration Statement.

         (j)      Following the occurrence of any event contemplated by Section
3(c)(C)(iv), as promptly as possible, prepare a supplement or amendment,
including a post-effective amendment, to the Registration Statement or a
supplement to the related Prospectus or any document incorporated or deemed to
be incorporated therein by reference, and file any other required document so
that, as thereafter delivered, neither the Registration Statement nor such
Prospectus will contain an untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary to make the
statements therein, in the light of the circumstances under which they were
made, not misleading.

         (k)      Cause all Registrable Securities relating to such Registration
Statement to be listed on any United States securities exchange, quotation
system, market or over-the-counter bulletin board, if any, on which similar
securities issued by the Company are then listed.

         (l)      Comply in all material respects 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 and Rule 158 not later than 45 days after the end of any 3-month
period (or 90 days after the end of any 12-month period if such period is a
fiscal year) commencing on the first day of the first fiscal quarter of the
Company after the effective date of the Registration Statement, which statement
shall conform to the requirements of Rule 158.

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         (m)      Request each selling Holder to furnish to the Company
information regarding such Holder and the distribution of such Registrable
Securities as is required by law or the Commission to be disclosed in the
Registration Statement, and the Company may exclude from such registration the
Registrable Securities of any such Holder who fails to furnish such information
within a reasonable time prior to the filing of each Registration Statement,
supplemented Prospectus and/or amended Registration Statement.

         If the Registration Statement refers to any Holder by name or otherwise
as the holder of any securities of the Company, then such Holder shall have the
right to require (if such reference to such Holder by name or otherwise is not
required by the Securities Act or any similar federal statute then in force) the
deletion of the reference to such Holder in any amendment or supplement to the
Registration Statement filed or prepared subsequent to the time that such
reference ceases to be required.

         Each Holder agrees by its acquisition of such Registrable Securities
that, upon receipt of a notice from the Company of the occurrence of any event
of the kind described in Section 3(c)(C)(i), 3(c)(C)(ii), 3(c)(C)(iii),
3(c)(C)(iv), or 3(n), such Holder will forthwith discontinue disposition of such
Registrable Securities under the Registration Statement until such Holder's
receipt of the copies of the supplemented Prospectus and/or amended Registration
Statement contemplated by Section 3(j), or until it is advised in writing (the
"Advice") by the Company that the use of the applicable Prospectus may be
resumed, and, in either case, has received copies of any additional or
supplemental filings that are incorporated or deemed to be incorporated by
reference in such Prospectus or Registration Statement.

         (n)      If (i) there is material non-public information regarding the
Company which the Company's Board of Directors (the "Board") reasonably
determines not to be in the Company's best interest to disclose and which the
Company is not otherwise required to disclose, or (ii) there is a significant
business opportunity (including, but not limited to, the acquisition or
disposition of assets (other than in the ordinary course of business) or any
merger, consolidation, tender offer or other similar transaction) available to
the Company which the Board reasonably determines not to be in the Company's
best interest to disclose and which the Company would be required to disclose
under the Registration Statement, then the Company may postpone or suspend
filing or effectiveness of a registration statement for a period not to exceed
30 consecutive days, provided that the Company may not postpone or suspend its
obligation under this Section 3(n) for more than 60 days in the aggregate during
any 12 month period (each, a "Blackout Period").

         4.       Registration Expenses.

         All fees and expenses incident to the performance of or compliance with
this Agreement by the Company shall be borne by the Company whether or not the
Registration Statement is filed or becomes effective and whether or not any
Registrable Securities are sold pursuant to the Registration Statement. The fees
and expenses referred to in the foregoing sentence shall include, without
limitation, (i) all registration and filing fees (including, without limitation,
fees and expenses (A) with respect to filings required to be made with any
securities exchange, quotation system, market or over-the-counter bulletin board

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on which Registrable Securities are required hereunder to be listed, (B) with
respect to filings required to be made with the Commission, and (C) in
compliance with state securities or Blue Sky laws (including, without
limitation, reasonable and documented fees and disbursements of Special Counsel
in connection with Blue Sky qualifications of the Registrable Securities and
determination of the eligibility of the Registrable Securities for investment
under the laws of such jurisdictions as the Holders of a majority of Registrable
Securities may designate)), (ii) printing expenses (including, without
limitation, expenses of printing certificates for Registrable Securities and of
printing or photocopying prospectuses), (iii) messenger, telephone and delivery
expenses, (iv) Securities Act liability insurance, if the Company so desires
such insurance, (v) fees and expenses of all other Persons retained by the
Company in connection with the consummation of the transactions contemplated by
this Agreement, including, without limitation, the Company's independent public
accountants (including, in the case of an underwritten offering, the expenses of
any comfort letters or costs associated with the delivery by independent public
accountants of a comfort letter or comfort letters) and legal counsel, and (vi)
reasonable and documented fees and expenses of the Special Counsel in connection
with any Registration Statement hereunder. In addition, the Company shall be
responsible for all of its internal expenses incurred in connection with the
consummation of the transactions contemplated by this Agreement (including,
without limitation, all salaries and expenses of its officers and employees
performing legal or accounting duties), the expense of any annual audit, the
fees and expenses incurred in connection with the listing of the Registrable
Securities on any securities exchange as required hereunder.

         5.       Indemnification.

         (a)      Indemnification by the Company. The Company shall,
notwithstanding any termination of this Agreement, indemnify and hold harmless
each Holder, the officers, directors, agents, brokers (including brokers who
offer and sell Registrable Securities as principal as a result of a pledge or
any failure to perform under a margin call of Common Stock), investment advisors
and employees of each of them, each Person who controls any such Holder (within
the meaning of Section 15 of the Securities Act or Section 20 of the Exchange
Act) and the officers, directors, agents and employees of each such controlling
Person, to the fullest extent permitted by applicable law, from and against any
and all losses, claims, damages, liabilities, costs (including, without
limitation, costs of preparation and reasonable attorneys' fees) and expenses
(collectively, "Losses"), as incurred, arising out of or relating to any untrue
or alleged untrue statement of a material fact contained or incorporated by
reference in the Registration Statement, any Prospectus or any form of
prospectus or in any amendment or supplement thereto or in any preliminary
prospectus, or arising out of or relating to any omission or alleged omission of
a material fact required to be stated therein or necessary to make the
statements therein (in the case of any Prospectus or form of prospectus or
amendment or supplement thereto, in the light of the circumstances under which
they were made) not misleading, except to the extent, but only to the extent,
that (i) such untrue statements or omissions are based solely upon information
regarding such Holder furnished in writing to the Company by such Holder
expressly for use therein, which information was reasonably relied on by the
Company for use therein or to the extent that such information relates to (x)
such Holder and was reviewed and expressly approved in writing by such Holder
expressly for use in the Registration Statement, such Prospectus or such form of

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prospectus or in any amendment or supplement thereto or (y) such Holder's
proposed method of distribution of Registrable Securities as set forth in
Exhibit A (or as such Holder otherwise informs the Company in writing); or (ii)
in the case of an occurrence of an event of the type described in Section
3(c)(C)(ii), 3(c)(C)(iii), 3(c)(C)(iv) or 3(n), the use by a Holder of an
outdated or defective Prospectus after the delivery to the Holder of written
notice from the Company that the Prospectus is outdated or defective and prior
to the receipt by such Holder of the Advice contemplated in Section 3(m);
provided, however, that the indemnity agreement contained in this Section 5(a)
shall not apply to amounts paid in settlement of any Losses if such settlement
is effected without the prior written consent of the Company, which consent
shall not be unreasonably withheld. The Company shall notify the Holders
promptly of the institution, threat or assertion of any Proceeding of which the
Company is aware in connection with the transactions contemplated by this
Agreement. Such indemnity shall remain in full force and effect regardless of
any investigation made by or on behalf of an Indemnified Party (as defined in
Section 5(c) to this Agreement) and shall survive the transfer of the
Registrable Securities by the Holders.

         (b)      Indemnification by Holders. Each Holder shall, severally and
not jointly, indemnify and hold harmless the Company, its directors, officers,
agents and employees, each Person who controls the Company (within the meaning
of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the
directors, officers, agents and employees of such controlling Persons, to the
fullest extent permitted by applicable law, from and against all Losses, as
incurred, arising solely out of or based solely upon any untrue statement of a
material fact contained in the Registration Statement, any Prospectus, or any
form of prospectus, or in any amendment or supplement thereto, or arising solely
out of or based solely upon any omission of a material fact required to be
stated therein or necessary to make the statements therein (in the case of any
Prospectus or form of prospectus or supplement thereto, in the light of the
circumstances under which they were made) not misleading, to the extent, but
only to the extent, that (i) such untrue statement or omission is contained in
or omitted from any information so furnished in writing by such Holder to the
Company specifically for inclusion in the Registration Statement or such
Prospectus and that such information was reasonably relied upon by the Company
for use in the Registration Statement, such Prospectus, or in any amendment or
supplement thereto, or to the extent that such information relates to (x) such
Holder and was reviewed and expressly approved in writing by such Holder
expressly for use in the Registration Statement, such Prospectus, or such form
of prospectus or in any amendment or supplement thereto or (y) such Holder's
proposed method of distribution of Registrable Securities as set forth in
Exhibit A (or as such Holder otherwise informs the Company in writing) or (ii)
in the case of an occurrence of an event of the type described in Section
3(c)(C)(ii), 3(c)(C)(iii), 3(c)(C)(iv) or 3(n), the use by a Holder of an
outdated or defective Prospectus after the delivery to the Holder of written
notice from the Company that the Prospectus is outdated or defective and prior
to the receipt by such Holder of the Advice contemplated in Section 3(m);
provided, however, that the indemnity agreement contained in this Section 5(b)
shall not apply to amounts paid in settlement of any Losses if such settlement
is effected without the prior written consent of the Holder, which consent shall
not be unreasonably withheld. Notwithstanding anything to the contrary contained
herein, the Holder shall be liable under this Section 5(b) for only that amount
as does not exceed the net proceeds to such Holder as a result of the sale of
Registrable Securities pursuant to such Registration Statement.

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         (c)      Conduct of Indemnification Proceedings. If any Proceeding
shall be brought or asserted against any Person entitled to indemnity hereunder
(an "Indemnified Party"), such Indemnified Party promptly shall notify the
Person from whom indemnity is sought (the "Indemnifying Party") in writing, and
the Indemnifying Party shall have the right to assume the defense thereof,
including the employment of counsel reasonably satisfactory to the Indemnified
Party and the payment of all reasonable fees and expenses incurred in connection
with defense thereof; provided, that the failure of any Indemnified Party to
give such notice shall not relieve the Indemnifying Party of its obligations or
liabilities pursuant to this Agreement, except (and only) to the extent that it
shall be finally determined by a court of competent jurisdiction (which
determination is not subject to appeal or further review) that such failure
shall have proximately and materially adversely prejudiced the Indemnifying
Party.

         An Indemnified Party shall have the right to employ separate counsel in
any such Proceeding and to participate in the defense thereof, but the fees and
expenses of such counsel shall be at the expense of such Indemnified Party or
Parties unless: (1) the Indemnifying Party has agreed in writing to pay such
fees and expenses; or (2) the Indemnifying Party shall have failed promptly to
assume the defense of such Proceeding and to employ counsel reasonably
satisfactory to such Indemnified Party in any such Proceeding; or (3) the named
parties to any such Proceeding (including any impleaded parties) include both
such Indemnified Party and the Indemnifying Party, and such Indemnified Party
shall have been advised by counsel that a conflict of interest is likely to
exist if the same counsel were to represent such Indemnified Party and the
Indemnifying Party (in which case, if such Indemnified Party notifies the
Indemnifying Party in writing that it elects to employ separate counsel at the
expense of the Indemnifying Party, the Indemnifying Party shall not have the
right to assume the defense thereof and such counsel shall be at the reasonable
expense of the Indemnifying Party). The Indemnifying Party shall not be liable
for any settlement of any such Proceeding effected without its written consent,
which consent shall not be unreasonably withheld. No Indemnifying Party shall,
without the prior written consent of the Indemnified Party, effect any
settlement of any pending Proceeding in respect of which any Indemnified Party
is a party, unless such settlement includes an unconditional release of such
Indemnified Party from all liability on claims that are the subject matter of
such Proceeding and does not impose any monetary or other obligation or
restriction on the Indemnified Party.

         All reasonable fees and expenses of the Indemnified Party (including
reasonable fees and expenses to the extent incurred in connection with
investigating or preparing to defend such Proceeding in a manner not
inconsistent with this Section) shall be paid to the Indemnified Party, as
incurred, within ten (10) Business Days of written notice thereof to the
Indemnifying Party, which notice shall be delivered no more frequently than on a
monthly basis (regardless of whether it is ultimately determined that an
Indemnified Party is not entitled to indemnification hereunder; provided, that
the Indemnifying Party may require such Indemnified Party to undertake to
reimburse all such fees and expenses to the extent it is finally judicially
determined that such Indemnified Party is not entitled to indemnification
hereunder).

                                       11
<PAGE>

         (d)      Contribution. If a claim for indemnification under Section
5(a) or 5(b) is unavailable to an Indemnified Party because of a failure or
refusal of a governmental authority to enforce such indemnification in
accordance with its terms (by reason of public policy or otherwise), then each
Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall
contribute to the amount paid or payable by such Indemnified Party as a result
of such Losses, in such proportion as is appropriate to reflect the relative
fault of the Indemnifying Party and Indemnified Party in connection with the
actions, statements or omissions that resulted in such Losses as well as any
other relevant equitable considerations. The relative fault of such Indemnifying
Party and Indemnified Party shall be determined by reference to, among other
things, whether any action in question, including any untrue or alleged untrue
statement of a material fact or omission or alleged omission of a material fact,
has been taken or made by, or relates to information supplied by, such
Indemnifying Party or Indemnified Party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
action, statement or omission. The amount paid or payable by a party as a result
of any Losses shall be deemed to include, subject to the limitations set forth
in Section 5(c), any reasonable attorneys' or other reasonable fees or expenses
incurred by such party in connection with any Proceeding to the extent such
party would have been indemnified for such fees or expenses if the
indemnification provided for in this Section was available to such party in
accordance with its terms. Notwithstanding anything to the contrary contained
herein, the Holder shall be required to contribute under this Section 5(d) for
only that amount as does not exceed the net proceeds to such Holder as a result
of the sale of Registrable Securities pursuant to such Registration Statement.

         The parties hereto agree that it would not be just and equitable if
contribution pursuant to this Section 5(d) were determined by pro rata
allocation or by any other method of allocation that does not take into account
the equitable considerations referred to in the immediately preceding paragraph.
No Person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any Person
who was not guilty of such fraudulent misrepresentation.

         The indemnity and contribution agreements contained in this Section are
in addition to any liability that the Indemnifying Parties may have to the
Indemnified Parties. The indemnity and contribution agreements herein are in
addition to and not in diminution or limitation of any indemnification
provisions under the Purchase Agreement.

         6.       Rule 144.

         As long as any Holder owns Preferred Stock, Conversion Shares, Warrants
or Warrant Shares, the Company covenants to timely file (or obtain extensions in
respect thereof and file within the applicable grace period) all reports
required to be filed by the Company after the date hereof pursuant to Section
13(a) or 15(d) of the Exchange Act. As long as any Holder owns Preferred Stock,
Conversion Shares, Warrants or Warrant Shares, if the Company is not required to
file reports pursuant to Section 13(a) or 15(d) of the Exchange Act, it will
prepare and furnish to the Holders and make publicly available in accordance
with Rule 144(c) promulgated under the Securities Act annual and quarterly
financial statements, together with a discussion and analysis of such financial
statements in form and substance substantially similar to those that would
otherwise be required to be included in reports required by Section 13(a) or
15(d) of the Exchange Act, as well as any other information required thereby, in

                                       12
<PAGE>

the time period that such filings would have been required to have been made
under the Exchange Act. The Company further covenants that it will take such
further action as any Holder may reasonably request, all to the extent required
from time to time to enable such Person to sell Preferred Stock, Conversion
Shares, Warrants and Warrant Shares without registration under the Securities
Act within the limitation of the exemptions provided by Rule 144 promulgated
under the Securities Act, including compliance with the provisions of the
Purchase Agreement relating to the transfer of the Preferred Stock, Conversion
Shares, Warrants and Warrant Shares. Upon the request of any Holder, the Company
shall deliver to such Holder a written certification of a duly authorized
officer as to whether it has complied with such requirements.

         7.       Miscellaneous.

         (a)      Remedies. In the event of a breach by the Company or by a
Holder, of any of their obligations under this Agreement, each Holder or the
Company, as the case may be, in addition to being entitled to exercise all
rights granted by law and under this Agreement, including recovery of damages,
will be entitled to specific performance of its rights under this Agreement. The
Company and each Holder agree that monetary damages would not provide adequate
compensation for any losses incurred by reason of a breach by it of any of the
provisions of this Agreement and hereby further agrees that, in the event of any
action for specific performance in respect of such breach, it shall waive the
defense that a remedy at law would be adequate.

         (b)      No Inconsistent Agreements. Except as otherwise disclosed in
the Purchase Agreement, neither the Company nor any of its subsidiaries is a
party to an agreement currently in effect, nor shall the Company or any of its
subsidiaries, on or after the date of this Agreement, enter into any agreement
with respect to its securities that is inconsistent with the rights granted to
the Holders in this Agreement or otherwise conflicts with the provisions hereof.
Without limiting the generality of the foregoing, without the written consent of
the Holders of a majority of the then outstanding Registrable Securities, the
Company shall not grant to any Person the right to request the Company to
register any securities of the Company under the Securities Act unless the
rights so granted are subject in all respects to the rights of the Holders set
forth herein, and are not otherwise in conflict with the provisions of this
Agreement.

         (c)      Notice of Effectiveness. Within two (2) Business Days after
the Registration Statement which includes the Registrable Securities is ordered
effective by the Commission, the Company shall deliver, and shall cause legal
counsel for the Company to deliver, to the transfer agent for such Registrable
Securities (with copies to the Holders whose Registrable Securities are included
in such Registration Statement) confirmation that the Registration Statement has
been declared effective by the Commission in the form attached hereto as Exhibit
B.

         (d)      Piggy-Back Registrations. If at any time when there is not an
effective Registration Statement covering all of the Registrable Securities, the
Company shall determine to prepare and file with the Commission a registration
statement relating to an offering for its own account or the account of others
under the Securities Act of any of its equity securities, other than on Form S-4

                                       13
<PAGE>

or Form S-8 (each as promulgated under the Securities Act) or its then
equivalents relating to equity securities to be issued solely in connection with
any acquisition of any entity or business or equity securities issuable in
connection with stock option or other employee benefit plans, the Company shall
send to each Holder of Registrable Securities written notice of such
determination and, if within seven (7) Business Days after receipt of such
notice, any such Holder shall so request in writing (which request shall specify
the Registrable Securities intended to be disposed of by the Holder), the
Company will cause the registration under the Securities Act of all Registrable
Securities which the Company has been so requested to register by the Holder, to
the extent required to permit the disposition of the Registrable Securities so
to be registered, provided that if at any time after giving written notice of
its intention to register any securities and prior to the effective date of the
registration statement filed in connection with such registration, the Company
shall determine for any reason not to register or to delay registration of such
securities, the Company may, at its election, give written notice of such
determination to such Holder and, thereupon, (i) in the case of a determination
not to register, shall be relieved of its obligation to register any Registrable
Securities in connection with such registration (but not from its obligation to
pay expenses in accordance with Section 4 hereof), and (ii) in the case of a
determination to delay registering, shall be permitted to delay registering any
Registrable Securities being registered pursuant to this Section 7(d) for the
same period as the delay in registering such other securities. The Company shall
include in such registration statement all or any part of such Registrable
Securities such Holder requests to be registered. In the case of an underwritten
public offering, if the managing underwriter(s) or underwriter(s) should
reasonably object to the inclusion of the Registrable Securities in such
registration statement, then if the Company after consultation with the managing
underwriter should reasonably determine that the inclusion of such Registrable
Securities, would materially adversely affect the offering contemplated in such
registration statement, and based on such determination recommends inclusion in
such registration statement of fewer or none of the Registrable Securities of
the Holders, then (x) the number of Registrable Securities of the Holders
included in such registration statement shall be reduced pro-rata among such
Holders (based upon the number of Registrable Securities requested to be
included in the registration), if the Company after consultation with the
underwriter(s) recommends the inclusion of fewer Registrable Securities, or (y)
none of the Registrable Securities of the Holders shall be included in such
registration statement, if the Company after consultation with the
underwriter(s) recommends the inclusion of none of such Registrable Securities;
provided, however, that if securities are being offered for the account of other
persons or entities as well as the Company, such reduction shall not represent a
greater fraction of the number of Registrable Securities intended to be offered
by the Holders than the fraction of similar reductions imposed on such other
persons or entities (other than the Company).

         (e)      Failure to File Registration Statement and Other Events. The
Company and the Holders agree that the Holders will suffer damages if the
Registration Statement is not filed on or prior to the thirtieth (30th) day
following the Initial Closing Date and maintained in the manner contemplated
herein during the Effectiveness Period. The Company and the Holders further
agree that it would not be feasible to ascertain the extent of such damages with
precision. Accordingly, if (i) the Registration Statement is not filed on or
prior to the thirtieth (30th) day following the Initial Closing Date, or (ii)
the Company fails to file with the Commission a request for acceleration in

                                       14
<PAGE>

accordance with Rule 461 promulgated under the Securities Act within five (5)
Business Days of the date that the Company is notified (orally or in writing,
whichever is earlier) by the Commission that a Registration Statement will not
be "reviewed," or not subject to further review, or (iii) the Registration
Statement is filed with and declared effective by the Commission but thereafter
ceases to be effective as to all Registrable Securities at any time prior to the
expiration of the Effectiveness Period, without being succeeded immediately by a
subsequent Registration Statement filed with the Commission, except as otherwise
permitted by this Agreement, including pursuant to Section 3(n), or (iv) trading
in the Common Stock shall be suspended or if the Common Stock is delisted from
any securities exchange, quotation system, market or over-the-counter bulletin
board on which Registrable Securities are required hereunder to be listed (each
an "Exchange"), without immediately being listed on any other Exchange, for any
reason for more than one (1) Business Day, other than pursuant to Section 3(n),
or (v) the rights of the Holders to exercise into Warrant Shares are suspended
for any reason without the consent of the particular Holder (any such failure or
breach being referred to as an "Event"), the Company shall pay in cash as
liquidated damages for such failure and not as a penalty to each Holder an
amount equal to one percent (1%) of such Holder's pro rata share of the purchase
price paid by all Holders for Purchased Shares purchased and then outstanding
pursuant to the Purchase Agreement for the initial thirty (30) day period until
the applicable Event has been cured, which shall be pro rated for such periods
less than thirty (30) days and one percent (1%) of such Holder's pro rata share
of the purchase price paid by all Holders for Purchased Shares purchased and
then outstanding pursuant to the Purchase Agreement for each subsequent thirty
(30) day period until the applicable Event has been cured which shall be pro
rated for such periods less than thirty days (the "Periodic Amount"). Payments
to be made pursuant to this Section 7(e) shall be due and payable immediately
upon demand in immediately available cash funds. The parties agree that the
Periodic Amount represents a reasonable estimate on the part of the parties, as
of the date of this Agreement, of the amount of damages that may be incurred by
the Holders if the Registration Statement is not filed on or prior to the
thirtieth (30th) day following the Initial Closing Date and maintained in the
manner contemplated herein during the Effectiveness Period or if any other Event
as described herein has occurred. Notwithstanding the foregoing, the Company
shall remain obligated to cure the breach or correct the condition that caused
the Event, and the Holder shall have the right to take any action necessary or
desirable to enforce such obligation.

         (f)      Failure of Registration Statement to Become Effective. The
Company and the Holders agree that the Holders will suffer damages if the
Registration Statement is not declared effective on or prior to the ninetieth
(90th) day following the Initial Closing Date. The Company and the Holders
further agree that it would not be feasible to ascertain the extent of such
damages with precision. Accordingly, if the Registration Statement is not
declared effective within one-hundred and twenty (120) days after the date on
which the Registration Statement is originally filed with the Commission, the
Company shall pay in cash as liquidated damages for such failure and not as a
penalty to each Holder an amount equal to (i) one percent (1%) of such Holder's
Subscription Amount and (ii) one percent (1%) of such Holder's Subscription
Amount for each subsequent thirty (30) day period (which shall be pro rated for
such periods less than thirty (30) days) until either (x) the Registration
Statement is declared effective or (y) the twelfth (12th) month after the
Initial Closing Date has ended. Payments to be made pursuant to this Section

                                       15
<PAGE>

7(f) shall be due and payable immediately upon demand in immediately available
cash funds. The parties agree that the amounts set forth in this Section 7(f)
represent a reasonable estimate on the part of the parties, as of the date of
this Agreement, of the amount of damages that may be incurred by the Holders if
the Registration Statement is not declared effective on or prior to the
ninetieth (90th) day following the date on which the Registration Statement is
originally filed with the Commission. At any time that amounts continue to
accrue pursuant to Section 7(e), such amounts shall be credited against any
amounts that simultaneously accrue pursuant to this Section 7(f) such that the
Company shall in no event be obligated to make any payments under this Section
7(f) with respect to any period for which it is obligated to pay the Periodic
Amount under Section 7(e). Notwithstanding the foregoing, the Company shall
remain obligated to cause the Registration Statement to become effective, and
the Holders shall have the right to take any action necessary or desirable to
enforce this obligation.

         (g)      Specific Enforcement, Consent to Jurisdiction.

                  (i)      The Company and the Holders acknowledge and agree
         that irreparable damage would occur in the event that any of the
         provisions of this Agreement were not performed in accordance with
         their specific terms or were otherwise breached. It is accordingly
         agreed that the parties shall be entitled to an injunction or
         injunctions to prevent or cure breaches of the provisions of this
         Agreement and to enforce specifically the terms and provisions hereof,
         this being in addition to any other remedy to which any of them may be
         entitled by law or equity.

                  (ii)     Each of the Company and the Holders (i) hereby
         irrevocably submits to the exclusive jurisdiction of the state and
         federal courts located in New York City, New York for the purposes of
         any suit, action or proceeding arising out of or relating to this
         Agreement and (ii) hereby waives, and agrees not to assert in any such
         suit, action or proceeding, any claim that it is not personally subject
         to the jurisdiction of such court, that the suit, action or proceeding
         is brought in an inconvenient forum or that the venue of the suit,
         action or proceeding is improper. Each of the Company and the Holders
         consents to process being served in any such suit, action or proceeding
         by mailing a copy thereof to such party at the address in effect for
         notices to it under this Agreement and agrees that such service shall
         constitute good and sufficient service of process and notice thereof.
         Nothing in this Section 7(h) shall affect or limit any right to serve
         process in any other manner permitted by law.

         (h)      Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the same shall be in writing and signed by the Company
and the Holders of at least a majority of the Registrable Securities.
Notwithstanding the foregoing, a waiver or consent to depart from the provisions
hereof with respect to a matter that relates exclusively to the rights of
Holders and that does not directly or indirectly affect the rights of other
Holders may be given by Holders of the Registrable Securities to which such
waiver or consent relates; provided, however, that the provisions of this
sentence may not be amended, modified, or supplemented except in accordance with
the provisions of the immediately preceding sentence. Notwithstanding the

                                       16
<PAGE>

foregoing, this Agreement may be amended by the Company with the consent of SCO
Securities LLC and without the consent of the other Purchasers by supplementing
Schedule 1 with respect to Purchasers in any Additional Closing pursuant to
Section 2.1 of the Purchase Agreement and by adding any such Purchaser as
parties to this Agreement, provided that any such Purchaser agrees to be bound
by this Agreement by executing a counterpart signature page to this agreement.

         (i)      Notices. Any and all notices or other communications or
deliveries required or permitted to be provided hereunder shall be in writing
and shall be deemed given and effective on the earlier of (i) the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile telephone number specified for notice prior to 5:00 p.m., New York
City time, on a Business Day, (ii) the next Business Day after the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile number specified in this Section on a day that is not a Business Day
or later than 5:00 p.m., New York City time, on any date and earlier than 11:59
p.m., New York City time, on such date, (iii) the Business Day following the
date of mailing, if sent by nationally recognized overnight courier service such
as Federal Express or (iv) actual receipt by the party to whom such notice is
required to be given. The addresses for such communications shall be with
respect to each Holder at its address set forth under its name on Schedule 1
attached hereto, or with respect to the Company, addressed to:

                        Somanta Pharmaceuticals, Inc.
                        19200 Von Karman Avenue, Suite 400
                        Irvine, CA  92612
                        Attn: Terrance J. Bruggeman, Executive Chairman
                        Fax: 949-706-3698

or to such other address or addresses or facsimile number or numbers as any such
party may most recently have designated in writing to the other parties hereto
by such notice. Copies of notices to the Company shall be sent to:

                        Foley & Lardner LLP
                        402 W. Broadway
                        23rd Floor
                        San Diego, CA 92101
                        Attn: Adam Lenain, Esq.
                        Fax: 619-234-3510

Copies of notices to any Holder shall be sent to the addresses, if any, listed
on Schedule 1 attached hereto.

         (j)      Successors and Assigns. This Agreement shall be binding upon
and inure to the benefit of the parties and their successors and permitted
assigns and shall inure to the benefit of each Holder and its successors and
assigns; provided, that the Company may not assign this Agreement or any of its
rights or obligations hereunder without the prior written consent of each
Holder; and provided, further, that each Holder may assign its rights hereunder
in the manner and to the Persons as permitted under the Purchase Agreement.

                                       17
<PAGE>

         (k)      Assignment of Registration Rights. The rights of each Holder
hereunder, including the right to have the Company register for resale
Registrable Securities in accordance with the terms of this Agreement, shall be
automatically assignable by each Holder to any transferee of such Holder of all
or a portion of the Preferred Stock, Conversion Shares, the Warrants, the
Warrant Shares or the Registrable Securities if: (i) the Holder agrees in
writing with the transferee or assignee to assign such rights, and a copy of
such agreement is furnished to the Company within a reasonable time after such
assignment, (ii) the Company is, within a reasonable time after such transfer or
assignment, furnished with written notice of (a) the name and address of such
transferee or assignee, and (b) the securities with respect to which such
registration rights are being transferred or assigned, (iii) following such
transfer or assignment the further disposition of such securities by the
transferee or assignees is restricted under the Securities Act and applicable
state securities laws, (iv) at or before the time the Company receives the
written notice contemplated by clause (ii) of this Section 7(k), the transferee
or assignee agrees in writing with the Company to be bound by all of the
provisions of this Agreement, and (v) such transfer shall have been made in
accordance with the applicable requirements of the Purchase Agreement. The
rights to assignment shall apply to the Holders (and to subsequent) successors
and assigns.

         The Company may require, as a condition of allowing such assignment in
connection with a transfer of Preferred Stock, Conversion Shares, Warrants,
Warrant Shares or Registrable Securities (i) that the Holder or transferee of
all or a portion of the Preferred Stock, Conversion Shares, Warrants, Warrant
Shares or Registrable Securities as the case may be, furnish to the Company a
written opinion of counsel that is reasonably acceptable to the Company to the
effect that such transfer may be made without registration under the Securities
Act, (ii) that the Holder or transferee execute and deliver to the Company an
investment letter in form and substance acceptable to the Company and (iii) that
the transferee be an "accredited investor" as defined in Rule 501(a) promulgated
under the Securities Act.

         (l)      Counterparts; Facsimile. This Agreement may be executed in any
number of 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
Agreement. In the event that any signature is delivered by electronic means or
facsimile transmission, such signature shall create a valid binding obligation
of the party executing (or on whose behalf such signature is executed) the same
with the same force and effect as if such facsimile signature were the original
thereof.

         (m)      Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without regard
to principles of conflicts of law thereof.

         (n)      Cumulative Remedies. The remedies provided herein are
cumulative and not exclusive of any remedies provided by law.

                                       18
<PAGE>

         (o)      Severability. If any term, provision, covenant or restriction
of this Agreement is held by a court of competent jurisdiction to be invalid,
illegal, void or unenforceable in any respect, the remainder of the terms,
provisions, covenants and restrictions set forth herein shall remain in full
force and effect and shall in no way be affected, impaired or invalidated, and
the parties hereto shall use their reasonable efforts to find and employ an
alternative means to achieve the same or substantially the same result as that
contemplated by such term, provision, covenant or restriction. It is hereby
stipulated and declared to be the intention of the parties that they would have
executed the remaining terms, provisions, covenants and restrictions without
including any of such that may be hereafter declared invalid, illegal, void or
unenforceable.

         (p)      Headings. The headings herein are for convenience only, do not
constitute a part of this Agreement and shall not be deemed to limit or affect
any of the provisions hereof.

         (q)      Registrable Securities Held by the Company and its Affiliates.
Whenever the consent or approval of Holders of a specified percentage of
Registrable Securities is required hereunder, Registrable Securities held by the
Company or its Affiliates (other than any Holder or transferees or successors or
assigns thereof if such Holder is deemed to be an Affiliate solely by reason of
its holdings of such Registrable Securities) shall not be counted in determining
whether such consent or approval was given by the Holders of such required
percentage.

         (r)      Obligations of Purchasers. The Company acknowledges that the
obligations of each Purchaser under this Agreement, are several and not joint
with the obligations of any other Purchaser, and no Purchaser shall be
responsible in any way for the performance of the obligations of any other
Purchaser under this Agreement. The decision of each Purchaser to enter into to
this Agreement has been made by such Purchaser independently of any other
Purchaser. The Company further acknowledges that nothing contained in this
Agreement, and no action taken by any Purchaser pursuant hereto, shall be deemed
to constitute the Purchasers as a partnership, an association, a joint venture
or any other kind of entity, or create a presumption that the Purchasers are in
any way acting in concert or as a group with respect to such obligations or the
transactions contemplated hereby. Each Purchaser shall be entitled to
independently protect and enforce its rights, including without limitation, the
rights arising out of this Agreement, and it shall not be necessary for any
other Purchaser to be joined as an additional party in any proceeding for such
purpose.

         Each Purchaser was introduced to the Company by SCO Securities LLC
which has acted solely as agent for the Company and not for any Purchaser (other
than itself). Each Purchaser has been represented by its own separate legal
counsel in their review and negotiation of this Agreement and with respect to
the transactions contemplated hereby. For reasons of administrative convenience
only, this Agreement has been prepared by Special Counsel (counsel for SCO
Securities LLC) and the Special Counsel will perform certain duties under this
Agreement. Such counsel does not represent all of the Purchasers but only SCO
Securities LLC. The Company has elected to provide all Purchasers with the same
terms and Agreement for the convenience of the Company and not because it was
required or requested to do so by the Purchasers. The Company acknowledges that
such procedure with respect to this Agreement in no way creates a presumption

                                       19
<PAGE>

that the Purchasers are in any way acting in concert or as a group with respect
to this Agreement or the transactions contemplated hereby or thereby.

                            [signature page follows]

                                       20
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Investor Rights
Agreement to be duly executed by their respective authorized persons as of the
date first indicated above.

COMPANY:

SOMANTA PHARMACEUTICALS, INC.

By: /s/ TERRANCE J. BRUGGEMAN
    ---------------------------------
Name:  Terrance J. Bruggeman
Title: Executive Chairman

                                       21
<PAGE>

PURCHASERS:

Print Exact Name:_________________________________

By:_____________________________________________
Name:
Title:

[Omnibus Somanta Pharmaceuticals, Inc. Investor Rights Agreement Signature Page]

                                       22
<PAGE>

                                   SCHEDULE 1

                                   PURCHASERS

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              Name and Address                       Copy of Notice to:
--------------------------------------------------------------------------------

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<PAGE>

                                    EXHIBIT A

                              PLAN OF DISTRIBUTION

         We are registering the shares of common stock on behalf of the selling
security holders. Sales of shares may be made by selling security holders,
including their respective donees, transferees, pledgees or other
successors-in-interest directly to purchasers or to or through underwriters,
broker-dealers or through agents. Sales may be made from time to time on the OTC
Bulletin Board, any other exchange or market upon which our shares may trade in
the future, in the over-the-counter market or otherwise, at market prices
prevailing at the time of sale, at prices related to market prices, or at
negotiated or fixed prices. The shares may be sold by one or more of, or a
combination of, the following:

-        a block trade in which the broker-dealer so engaged will attempt to
         sell the shares as agent but may position and resell a portion of the
         block as principal to facilitate the transaction (including crosses in
         which the same broker acts as agent for both sides of the transaction);

-        purchases by a broker-dealer as principal and resale by such
         broker-dealer, including resales for its account, pursuant to this
         prospectus;

-        ordinary brokerage transactions and transactions in which the broker
         solicits purchases;

-        through options, swaps or derivatives;

-        in privately negotiated transactions;

-        in making short sales or in transactions to cover short sales; and

-        put or call option transactions relating to the shares.

         The selling security holders may effect these transactions by selling
shares directly to purchasers or to or through broker-dealers, which may act as
agents or principals. These broker-dealers may receive compensation in the form
of discounts, concessions or commissions from the selling security holders
and/or the purchasers of shares for whom such broker-dealers may act as agents
or to whom they sell as principals, or both (which compensation as to a
particular broker-dealer might be in excess of customary commissions). The
selling security holders have advised us that they have not entered into any
agreements, understandings or arrangements with any underwriters or
broker-dealers regarding the sale of their securities.

         The selling security holders may enter into hedging transactions with
broker-dealers or other financial institutions. In connection with those
transactions, the broker-dealers or other financial institutions may engage in
short sales of the shares or of securities convertible into or exchangeable for
the shares in the course of hedging positions they assume with the selling
security holders. The selling security holders may also enter into options or
<PAGE>

other transactions with broker-dealers or other financial institutions which
require the delivery of shares offered by this prospectus to those
broker-dealers or other financial institutions. The broker-dealer or other
financial institution may then resell the shares pursuant to this prospectus (as
amended or supplemented, if required by applicable law, to reflect those
transactions).

         The selling security holders and any broker-dealers that act in
connection with the sale of shares may be deemed to be "underwriters" within the
meaning of Section 2(11) of the Securities Act of 1933, and any commissions
received by broker-dealers or any profit on the resale of the shares sold by
them while acting as principals may be deemed to be underwriting discounts or
commissions under the Securities Act. The selling security holders may agree to
indemnify any agent, dealer or broker-dealer that participates in transactions
involving sales of the shares against liabilities, including liabilities arising
under the Securities Act. We have agreed to indemnify each of the selling
security holders and each selling security holder has agreed, severally and not
jointly, to indemnify us against some liabilities in connection with the
offering of the shares, including liabilities arising under the Securities Act.

         The selling security holders will be subject to the prospectus delivery
requirements of the Securities Act. We have informed the selling security
holders that the anti-manipulative provisions of Regulation M promulgated under
the Securities Exchange Act of 1934 may apply to their sales in the market.

         Selling security holders also may resell all or a portion of the shares
in open market transactions in reliance upon Rule 144 under the Securities Act,
provided they meet the criteria and conform to the requirements of Rule 144.

         Upon being notified by a selling security holder that a material
arrangement has been entered into with a broker-dealer for the sale of shares
through a block trade, special offering, exchange distribution or secondary
distribution or a purchase by a broker or dealer, we will file a supplement to
this prospectus, if required pursuant to Rule 424(b) under the Securities Act,
disclosing:

-        the name of each such selling security holder and of the participating
         broker-dealer(s);

-        the number of shares involved;

-        the initial price at which the shares were sold;

-        the commissions paid or discounts or concessions allowed to the
         broker-dealer(s), where applicable;

-        that such broker-dealer(s) did not conduct any investigation to verify
         the information set out or incorporated by reference in this
         prospectus; and

-        other facts material to the transactions.
<PAGE>

         In addition, if required under applicable law or the rules or
regulations of the Commission, we will file a supplement to this prospectus when
a selling security holder notifies us that a donee or pledgee intends to sell
more than 500 shares of common stock.

         We are paying all expenses and fees customarily paid by the issuer in
connection with the registration of the shares. The selling security holders
will bear all brokerage or underwriting discounts or commissions paid to
broker-dealers in connection with the sale of the shares.

<PAGE>

                                    EXHIBIT B

            FORM OF NOTICE OF EFFECTIVENESS OF REGISTRATION STATEMENT

[Name and Address of Transfer Agent]

Re:  Somanta Pharmaceuticals, Inc.

Dear [______]:

         We are counsel to Somanta Pharmaceuticals, Inc., a Delaware corporation
(the "Company"), and have represented the Company in connection with that
certain Preferred Stock and Warrant Purchase Agreement (the "Purchase
Agreement") dated as of __________________, 2005 by and among the Company and
the buyers named therein (collectively, the "Holders") pursuant to which the
Company issued to the Holders shares of its Series A Convertible Preferred
Stock, par value $0.001 per share (the "Preferred Stock"), convertible into the
Company's Common Stock, par value $0.001 per share (the "Common Stock"), and
warrants to purchase shares of the Common Stock (the "Warrants"). Pursuant to
the Purchase Agreement, the Company has also entered into an Investor Rights
Agreement with the Holders (the "Investor Rights Agreement") pursuant to which
the Company agreed, among other things, to register the shares of Common Stock
issuable upon conversion of the Preferred Stock and upon exercise of the
Warrants, under the Securities Act of 1933, as amended (the "1933 Act"). In
connection with the Company's obligations under the Investor Rights Agreement,
on ____________ ___, 2005, the Company filed a Registration Statement on Form
S-__ (File No. 333-_____________) (the "Registration Statement") with the
Securities and Exchange Commission (the "SEC") relating to the Registrable
Securities (as defined in the Investor Rights Agreement) which names each of the
Holders as a selling securityholder thereunder.

         In connection with the foregoing, we advise you that a member of the
SEC's staff has advised us by telephone that the SEC has entered an order
declaring the Registration Statement effective under the 1933 Act at [ENTER TIME
OF EFFECTIVENESS] on [ENTER DATE OF EFFECTIVENESS] and we have no knowledge,
after telephonic inquiry of a member of the SEC's staff, that any stop order
suspending its effectiveness has been issued or that any proceedings for that
purpose are pending before, or threatened by, the SEC and the Registrable
Securities are available for resale under the 1933 Act pursuant to the
Registration Statement.

Very truly yours,

By:__________________________________
cc:  [LIST NAMES OF HOLDERS]71309791.6 079745-00000                               12

71309791.6 079745-00000

                             SUBSCRIPTION AGREEMENT

         This Subscription Agreement (the "Agreement") is made as of this ___
day of ________ 200_, by and between SiriCOMM, Inc., a Delaware corporation (the
"Company"), and the purchaser identified on the signature page to this Agreement
(the "Purchaser").

                                    Recitals:

         The Purchaser desires to subscribe for, purchase and acquire from the
Company and the Company desires to sell and issue to the Purchaser the amount of
units (each, a "Unit" and collectively, the "Units"), each Unit consisting of
(i) one share of common stock of the Company, $0.001 par value per share (the
"Common Stock") and (ii) redeemable Common Stock purchase warrants (the
"Warrants"), each entitling the holder thereof to purchase one share of Common
Stock at $1.50 per share during the period commencing on the date of issuance
until the fifth anniversary of such date, upon the terms and conditions and
subject to the provisions hereinafter set forth (such securities comprising the
Units shall be referred to as the "Securities" herein).

         NOW, THEREFORE, in consideration of the mutual promises,
representations, warranties, covenants, and conditions set forth herein and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties mutually agree as follows:

                                   Agreement:

         1. Purchase and Sale of the Units. Subject to the terms and conditions
of this Agreement, the Purchaser subscribes for and agrees to purchase and
acquire from the Company and the Company agrees to sell and issue to the
Purchaser the Units, in the manner set forth in Section 2, at the purchase price
set forth on the signature page of this Agreement (the "Purchase Price").

         2. Terms of Purchase and Sale of the Units. The closing of the
transactions contemplated hereby (the "Closing") shall take place on or before
the fifth full business day after the Notice Date (as such term is defined in
the Placement Agent Agreement dated as of December __, 2005 (the "Placement
Agent Agreement"), between the Company and Sanders Morris Harris Inc. (the
"Placement Agent")), at the offices of Sommer & Schneider LLP, 595 Stewart
Avenue, Suite 710, Garden City, New York 11530, or at such other time and place
as the Company and the Placement Agent may agree upon. Contemporaneously with
the delivery of this Agreement, the Purchaser shall deliver to Sterling Bank
(the "Escrow Agent") the Purchase Price by wire transfer of immediately
available funds pursuant to wire transfer instructions given to the Purchaser by
the Company. At the Closing, the Escrow Agent shall deliver to the Company the
Purchase Price by wire transfer of immediately available funds pursuant to wire
transfer instructions given to the Escrow Agent by the Company, and the Company
shall deliver to the Purchaser a certificate, registered in the name of the
Purchaser, representing the Units. Notwithstanding the foregoing, the
obligations of the Company and the Purchaser hereunder are subject to the
Company's receipt of aggregate subscriptions for a minimum of 2,000,000 Units on
or prior to January 13, 2006 (or such later closing date as may be agreed by the
Company and the Placement Agent), which date may be extended by the Company and
the Placement Agent pursuant to the terms of the Placement Agent Agreement (the
"Closing Date").

         3. Representations and Warranties of the Company. In order to induce
the Purchaser to enter into this Agreement, the Company represents and warrants
to the Purchaser the following:

                  (a) Authority. The Company is a corporation duly organized,
         validly existing, and in good standing under the laws of the State of
         Delaware, and has all requisite right, power, and authority to execute,
         deliver and perform this Agreement.

                  (b) Subsidiaries. The Company has no direct or indirect
         subsidiaries other than those set forth in set forth in the Exchange
         Act Documents (as defined in Section 3(f) below) (the "Subsidiaries").
         Except as disclosed in the Exchange Act Documents, the Company owns,
         directly or indirectly, all of the capital stock of each Subsidiary
         free and clear of any and all liens, and all the issued and outstanding
         shares of capital stock of each Subsidiary are validly issued and are
         fully paid, non-assessable and free of preemptive and similar rights.

                  (c) Enforceability. The execution, delivery, and performance
         of this Agreement by the Company have been duly authorized by all
         requisite corporate action. This Agreement has been duly executed and
         delivered by the Company, and, upon its execution by the Purchaser,
         shall constitute the legal, valid, and binding obligation of the
         Company, enforceable in accordance with its terms, except to the extent
         that its enforceability is limited by bankruptcy, insolvency,
         reorganization, or other laws relating to or affecting the enforcement
         of creditors' rights generally and by general principles of equity.

                  (d) No Violations. The execution, delivery, and performance of
         this Agreement by the Company does not, and will not, violate or
         conflict with any provision of the Company's Certificate of
         Incorporation or Bylaws and does not and will not, with or without the
         passage of time or the giving of notice, result in the breach of, or
         constitute a default, cause the acceleration of performance, or require
         any consent under (except such consents as have been obtained as of the
         date hereof), or result in the creation of any lien, charge or
         encumbrance upon any property or assets of the Company pursuant to, any
         material instrument or agreement to which the Company is a party or by
         which the Company or its properties are bound, except such consents as
         have been obtained as of the date hereof.

                  (e) Capitalization. The authorized capital stock of the
         Company consists of: 50,000,000 shares of Common Stock and 5,000,000
         shares of preferred stock, par value $.001 per share (the "Preferred
         Stock"). As of December 1, 2005, there were (i) 20,107,950 shares of
         Common Stock issued and outstanding and (ii) 213,417 shares of Series A
         Cumulative Convertible Preferred Stock issued and outstanding. As of
         December 1, 2005, the Company has outstanding options and warrants to
         purchase 7,148,573 shares of Common Stock. Upon issuance in accordance
         with the terms of this Agreement against payment of the Purchase Price
         therefore, the Units will be duly and validly issued, fully paid, and
         nonassessable and free and clear of all liens imposed by or through the
         Company, and, assuming the accuracy of the representations and
         warranties of the Purchaser, will be issued in accordance with a valid
         exemption from the registration or qualification provisions of the
         Securities Act of 1933, as amended (the "Securities Act"), and any
         applicable state securities laws (the "State Acts"). A sufficient
         number of shares of Common Stock have been reserved by the Company to
         accommodate the exercise of the Warrants in full in accordance with
         their terms. The shares of Common Stock issuable upon the exercise of
         the Warrants (the "Warrant Shares") have been duly authorized, and upon
         issuance of the Warrant Shares upon proper exercise of the Warrants, in
         accordance with the terms thereof, the Warrant Shares will be validly
         issued, fully paid, and non-assessable.

                  (f) Exchange Act Filing. During the 12 calendar months
         immediately preceding the date of this Agreement, all reports and
         statements required to be filed by the Company with the Securities and
         Exchange Commission ("SEC") under the Securities Exchange Act of 1934,
         as amended (the "Exchange Act"), and the rules and regulations
         thereunder, have been timely filed. Such filings, together with all
         documents incorporated by reference therein, are referred to as
         "Exchange Act Documents." Each Exchange Act Document, as amended,
         conformed in all material respects to the requirements of the Exchange
         Act and the rules and regulations thereunder, and no Exchange Act
         Document, as amended, at the time each such document was filed,
         included any untrue statement of a material fact or omitted to state
         any material fact required to be stated therein or necessary to make
         the statements therein, in light of the circumstances under which they
         were made, not misleading.

                  (g) Company Financial Statements. The audited financial
         statements, together with the related notes of the Company, at
         September 30, 2004 and September 30, 2005, and for the year then ended,
         included in the Company's Annual Report on Form 10-KSB for the fiscal
         years ended September 30, 2004 and September 30, 2005 (collectively,
         the "Company Financial Statements"), respectively, fairly present in
         all material respects, on the basis stated therein and on the date
         thereof, the financial position of the Company at the respective dates
         therein specified and its results of operations and cash flows for the
         periods then ended. Such statements and related notes have been
         prepared in accordance with generally accepted accounting principles in
         the United States applied on a consistent basis except as expressly
         noted therein.

                  (h) No Material Liabilities. Except for liabilities or
         obligations not individually in excess of $100,000, or liabilities or
         obligations as set forth in the Exchange Act Documents, since September
         30, 2005, the Company has not incurred any material liabilities or
         obligations, direct or contingent, except in the ordinary course of
         business and except for liabilities or obligations reflected or
         reserved against on the Company's balance sheet as of September 30,
         2005, and there has not been any change, or to the knowledge of the
         Company, development or effect (individually or in the aggregate) that
         is or is reasonably likely to be, materially adverse to the condition
         (financial or otherwise), business, prospects, or results of operations
         of the Company and the Subsidiaries considered as a whole (a "Material
         Adverse Effect") or any change in the capital or material increase in
         the long-term debt of the Company or any Subsidiary, nor has the
         Company declared, paid, or made any dividend or distribution of any
         kind on its capital stock.

                  (i) No Disputes Against Company. There is no material pending
         or, to the knowledge of the Company, threatened (i) action, suit,
         claim, proceeding, or investigation against the Company, at law or in
         equity, or before or by any federal, state, municipal, or other
         governmental department, commission, board, bureau, agency or
         instrumentality, domestic or foreign, (ii) arbitration proceeding
         against the Company, (iii) governmental inquiry against the Company, or
         (iv) any action or suit by or on behalf of the Company pending or
         threatened against others.

                  (j) Approvals. (i) The execution, delivery, and performance by
         the Company of this Agreement and the Registration Rights Agreement (as
         hereinafter defined) and (ii) the offer and sale of the Units require
         no consent of, action by or in respect of, or filing with, any person,
         governmental body, agency, or official other than those consents that
         have been obtained and filings that have been or will be made pursuant
         to the Securities Act and any State Act, which the Company undertakes
         to file within the applicable time period.

                  (k) Compliance. Neither the Company nor any Subsidiary (i) is
         in default under or in violation of (and no event has occurred that has
         not been waived that, with notice or lapse of time or both, would
         result in a default by the Company or any Subsidiary under), nor has
         the Company or any Subsidiary received notice of a claim that it is in
         default under or that it is in violation of, any indenture, loan or
         credit agreement, or any other agreement or instrument to which it is a
         party or by which it or any of its properties is bound (whether or not
         such default or violation has been waived), (ii) is in violation of any
         order of any court, arbitrator, or governmental body, or (iii) is or
         has been in violation of any statute, rule, or regulation of any
         governmental authority, including without limitation all foreign,
         federal, state, and local laws relating to taxes, environmental
         protection, occupational health and safety, product quality and safety
         and employment and labor matters, except in each case as could not,
         individually or in the aggregate, have or reasonably be expected to
         result in a Material Adverse Effect. The Company is in compliance with
         the applicable requirements of the Sarbanes-Oxley Act of 2002, as
         amended, and the rules and regulations thereunder, except where such
         noncompliance could not have or reasonably be expected to result in a
         Material Adverse Effect.

                  (l) Patents and Trademarks. The Company and the Subsidiaries
         have, or have rights to use, all patents, patent applications,
         trademarks, trademark applications, service marks, trade names,
         copyrights, licenses, and other similar rights that are necessary or
         material for use in connection with their respective businesses as
         described in the Exchange Act Documents and the Private Placement
         Memorandum dated December 6, 2005, as may be amended or supplemented
         prior to the Closing (the "PPM"), and which the failure to so have
         could, individually or in the aggregate, have or reasonably be expected
         to result in a Material Adverse Effect (collectively, the "Intellectual
         Property Rights"). Neither the Company nor any Subsidiary has received
         a written notice that the Intellectual Property Rights used by the
         Company or any Subsidiary violates or infringes upon the rights of any
         person. To the knowledge of the Company, all such Intellectual Property
         Rights are enforceable and there is no existing infringement by another
         person of any of the Intellectual Property Rights, except where such
         infringement could not have or reasonably be expected to result in a
         Material Adverse Effect.

                  (m) Transactions With Affiliates and Employees. Except as set
         forth in the Exchange Act Documents, none of the officers or directors
         of the Company and, to the knowledge of the Company, none of the
         employees of the Company is presently a party to any transaction with
         the Company or any Subsidiary (other than for services as employees,
         officers, and directors), including any contract, agreement, or other
         arrangement providing for the furnishing of services to or by,
         providing for rental of real or personal property to or from, or
         otherwise requiring payments to or from any officer, director, or such
         employee or, to the knowledge of the Company, any entity in which any
         officer, director, or any such employee has a substantial interest or
         is an officer, director, trustee, or partner.

                  (n) Internal Accounting Controls. The Company and the
         Subsidiaries maintain a system of internal accounting controls
         sufficient to provide reasonable assurance that (i) transactions are
         executed in accordance with management's general or specific
         authorizations, (ii) transactions are recorded as necessary to permit
         preparation of financial statements in conformity with generally
         accepted accounting principles and to maintain asset accountability,
         (iii) access to assets is permitted only in accordance with
         management's general or specific authorization, and (iv) the recorded
         accountability for assets is compared with the existing assets at
         reasonable intervals and appropriate action is taken with respect to
         any differences. The Company has established disclosure controls and
         procedures (as defined in Exchange Act rules 13a-15(e) and 15d-15(e))
         for the Company and designed such disclosure controls and procedures to
         ensure that material information relating to the Company, including its
         Subsidiaries, is made known to the certifying officers by others within
         those entities, particularly during the period in which the Company's
         Form 10-KSB or 10-QSB, as the case may be, is being prepared. The
         Company's certifying officers have evaluated the effectiveness of the
         Company's controls and procedures as of the end of the most recently
         ended fiscal quarter for which a report on Form 10-QSB has been filed
         (such date, the "Evaluation Date"). The Company presented in its most
         recently filed Form 10-KSB or Form 10-QSB the conclusions of the
         certifying officers about the effectiveness of the disclosure controls
         and procedures based on their evaluations as of the Evaluation Date.
         Since the Evaluation Date, there have been no significant changes in
         the Company's internal controls (as such term is defined in Item 307(b)
         of Regulation S-K under the Exchange Act) or, to the Company's
         knowledge, in other factors that could significantly affect the
         Company's internal controls.

                  (o) Solvency. Based on the financial condition of the Company
         as of the Closing Date (and assuming that the Closing shall have
         occurred), (i) the Company's fair saleable value of its assets exceeds
         the amount that will be required to be paid on or in respect of the
         Company's existing debts and other liabilities (including known
         contingent liabilities) as they mature; (ii) the Company's assets do
         not constitute unreasonably small capital to carry on its business for
         the current fiscal year as now conducted and as proposed to be
         conducted including its capital needs taking into account the
         particular capital requirements of the business conducted by the
         Company, and projected capital requirements and capital availability
         thereof; and (iii) the current cash flow of the Company, together with
         the proceeds the Company would receive, were it to liquidate all of its
         assets, after taking into account all anticipated uses of the cash,
         would be sufficient to pay all amounts on or in respect of its debt
         when such amounts are required to be paid. The Company does not intend
         to incur debts beyond its ability to pay such debts as they mature
         (taking into account the timing and amounts of cash to be payable on or
         in respect of its debt).

                  (p) Certain Fees. Except as may be due to the Placement Agent
         from the Company, no brokerage or finder's fees or commissions are or
         will be payable by the Company to any broker, financial advisor or
         consultant, finder, placement agent, investment banker, bank, or other
         person with respect to the transactions contemplated by this Agreement.
         The Purchaser shall have no obligation with respect to any Placement
         Agent fees or with respect to any claims (other than such fees or
         commissions owed by a Purchaser pursuant to written agreements executed
         by the Purchaser which fees or commissions shall be the sole
         responsibility of such Purchaser) made by or on behalf of other persons
         for fees of a type contemplated in this Section that may be due in
         connection with the transactions contemplated by this Agreement.

                  (q) Certain Registration Matters. Assuming the accuracy of the
         Purchaser's representations and warranties set forth in Section 4, no
         registration under the Securities Act is required for the offer and
         sale of the Units by the Company to the Purchaser hereunder.

                  (r) Listing and Maintenance Requirements. Except as specified
         in the Exchange Act Documents, the Company has not, in the two years
         preceding the date hereof, received notice from any stock exchange or
         automated dealer quotation system to the effect that the Company is not
         in compliance with the listing or maintenance requirements thereof. The
         Company is, and has no reason to believe that it will not in the
         foreseeable future continue to be, in compliance with the listing and
         maintenance requirements for continued listing of the Common Stock on
         the NASD OTC Bulletin Board.

                  (s) Investment Company. The Company is not, and is not an
         "affiliate" of, an "investment company" within the meaning of the
         Investment Company Act of 1940, as amended.

                  (t) No Additional Agreements. The Company does not have any
         agreement or understanding with any Purchaser with respect to the
         transactions contemplated by this Agreement and the Registration Rights
         Agreement on terms that differ from those set forth in this Agreement
         and the Registration Rights Agreement.

                  (u) Disclosure. The Company confirms that neither it nor any
         person acting on its behalf has provided the Purchaser or its agents or
         counsel with any information that the Company believes would constitute
         material, non-public information following the announcement of the
         Closing and the transactions contemplated thereby. The Company
         understands and confirms that the Purchaser will rely on the foregoing
         representations and covenants in effecting transactions in securities
         of the Company. All disclosure provided to the Purchaser regarding the
         Company, its business and the transactions contemplated hereby,
         furnished by or on behalf of the Company (including the disclosure in
         the PPM and the Company's representations and warranties set forth in
         this Agreement) are true and correct in all material respects and do
         not contain any untrue statement of a material fact or omit to state
         any material fact necessary in order to make the statements made
         therein, in light of the circumstances under which they were made, not
         misleading.

         4. Representations and Warranties of the Purchaser. In order to induce
the Company to enter into this Agreement, the Purchaser represents and warrants
to the Company the following:

                  (a) Authority. If a corporation, partnership, limited
         partnership, limited liability company, or other form of entity, the
         Purchaser is duly organized or formed, as the case may be, validly
         existing, and in good standing under the laws of its jurisdiction of
         organization or formation, as the case may be. The Purchaser has all
         requisite individual or entity right, power, and authority to execute,
         deliver, and perform this Agreement.

                  (b) Enforceability. The execution, delivery, and performance
         of this Agreement by the Purchaser have been duly authorized by all
         requisite partnership or corporate action, as the case may be. This
         Agreement has been duly executed and delivered by the Purchaser, and,
         upon its execution by the Company, shall constitute the legal, valid,
         and binding obligation of the Purchaser, enforceable in accordance with
         its terms, except to the extent that its enforceability is limited by
         bankruptcy, insolvency, reorganization, moratorium, or other laws
         relating to or affecting the enforcement of creditors' rights generally
         and by general principles of equity.

                  (c) No Violations. The execution, delivery, and performance of
         this Agreement by the Purchaser do not and will not, with or without
         the passage of time or the giving of notice, result in the breach of,
         or constitute a default, cause the acceleration of performance, or
         require any consent under, or result in the creation of any lien,
         charge or encumbrance upon any property or assets of the Purchaser
         pursuant to, any material instrument or agreement to which the
         Purchaser is a party or by which the Purchaser or its properties may be
         bound or affected, and, do not or will not violate or conflict with any
         provision of the articles of incorporation or bylaws, partnership
         agreement, operating agreement, trust agreement, or similar
         organizational or governing document of the Purchaser, as applicable.

                  (d) Knowledge of Investment and its Risks. The Purchaser has
         knowledge and experience in financial and business matters as to be
         capable of evaluating the merits and risks of Purchaser's investment in
         the Units. The Purchaser understands that an investment in the Company
         represents a high degree of risk and there is no assurance that the
         Company's business or operations will be successful. The Purchaser has
         considered carefully the risks attendant to an investment in the
         Company, and that, as a consequence of such risks, the Purchaser could
         lose Purchaser's entire investment in the Company.

                  (e) Own Account, Non-distribution, etc. The Purchaser hereby
         represents and warrants that (i) the Units are being acquired for the
         Purchaser's own account, and not as a nominee or agent and not with a
         view to the resale or distribution of all or any part of the Units or
         the Securities and the Purchaser has no present intention of selling,
         granting any participation in, or otherwise distributing any of the
         Units or the Securities within the meaning of the Securities Act, (ii)
         the Units are being acquired in the ordinary course of the Purchaser's
         business, and (iii) the Purchaser does not have any contracts,
         understandings, agreements, or arrangements, directly or indirectly,
         with any person and/or entity to distribute, sell, transfer, or grant
         participations to such person and/or entity with respect to, any of the
         Units or the Securities. The Purchaser is not purchasing the Units as a
         result of any advertisement, article, notice or other communication
         regarding the Units published in any newspaper, magazine or similar
         media or broadcast over television or radio or presented at any seminar
         or any other general solicitation or general advertisement.

                  (f) Purchaser Status. The Purchaser is an "Accredited
         Purchaser" as that term is defined by Rule 501 of Regulation D
         promulgated under the Securities Act and the information provided by
         the Purchaser in the Investor Questionnaire, a copy of which is
         attached hereto as Exhibit A, is truthful, accurate, and complete. The
         Purchaser is not registered as a broker-dealer under Section 15 of the
         Exchange Act.

                  (g) Disclosure. The Purchaser has reviewed information
         provided by the Company in connection with the decision to purchase the
         Units, consisting of the Company's publicly available filings with the
         SEC and the information contained therein. The Company has provided the
         Purchaser with all the information that the Purchaser has requested in
         connection with the decision to purchase the Units. The Purchaser
         further represents that the Purchaser has had an opportunity to ask
         questions and receive answers from the Company regarding the business,
         properties, prospects, and financial condition of the Company. All such
         questions have been answered to the full satisfaction of the Purchaser.
         Neither such inquiries nor any other investigation conducted by or on
         behalf of the Purchaser or its representatives or counsel shall modify,
         amend, or affect the Purchaser's right to rely on the truth, accuracy,
         and completeness of the disclosure materials and the Company's
         representations and warranties contained herein.

                  (h) No Registration. The Purchaser understands that Purchaser
         may be required to bear the economic risk of Purchaser's investment in
         the Company for an indefinite period of time. The Purchaser further
         understands that (i) neither the offering nor the sale of the Units or
         the Securities has been registered under the Securities Act or any
         applicable State Acts in reliance upon exemptions from the registration
         requirements of such laws, (ii) the Units and the Securities must be
         held by he, she or it indefinitely unless the sale or transfer thereof
         is subsequently registered under the Securities Act and any applicable
         State Acts, or an exemption from such registration requirements is
         available, (iii) except as set forth in the Registration Rights
         Agreement between the Company and the Purchaser, the Company is under
         no obligation to register any of the Units or the Securities on the
         Purchaser's behalf or to assist the Purchaser in complying with any
         exemption from registration, and (iv) the Company will rely upon the
         representations and warranties made by the Purchaser in this
         Subscription Agreement in order to establish such exemptions from the
         registration requirements of the Securities Act and any applicable
         State Acts.

                  (i) Transfer Restrictions. The Purchaser will not transfer any
         of the Units or the Securities unless such transfer is registered or
         exempt from registration under the Securities Act and such State Acts,
         and, if requested by the Company in the case of an exempt transaction,
         the Purchaser has furnished an opinion of counsel reasonably
         satisfactory to the Company that such transfer is so exempt. The
         Purchaser understands and agrees that (i) the certificates evidencing
         the Units will bear appropriate legends indicating such transfer
         restrictions placed upon the Units, (ii) the Company shall have no
         obligation to honor transfers of any of the Units or the Securities in
         violation of such transfer restrictions, and (iii) the Company shall be
         entitled to instruct any transfer agent or agents for the securities of
         the Company to refuse to honor such transfers.

                  (j) Principal Address. The Purchaser's principal residence, if
         an individual, or principal executive office, if an entity, is set
         forth on the signature page of this Subscription Agreement.

         5. Independent Nature of Purchaser's Obligations and Rights. The
obligations of the Purchaser under this Agreement, the Registration Rights
Agreement, and any other documents delivered in connection herewith and
therewith (collectively, the "Transaction Documents") are several and not joint
with the obligations of any other purchaser of Units, and the Purchaser shall
not be responsible in any way for the performance of the obligations of any
other purchaser of Units under any Transaction Document. The decision of the
Purchaser to purchase Units pursuant to the Transaction Documents has been made
by the Purchaser independently of any other purchaser of Units. Nothing
contained herein or in any Transaction Document, and no action taken by any
purchaser of Units pursuant thereto, shall be deemed to constitute such
purchasers as a partnership, an association, a joint venture, or any other kind
of entity, or create a presumption that the purchasers of Units are in any way
acting in concert or as a group with respect to such obligations or the
transactions contemplated by the Transaction Document. The Purchaser
acknowledges that no other purchaser of Units has acted as agent for the
Purchaser in connection with making its investment hereunder and that no other
purchaser of Units will be acting as agent of the Purchaser in connection with
monitoring its investment in the Units or enforcing its rights under the
Transaction Documents. The Purchaser shall be entitled to independently protect
and enforce its rights, including without limitation the rights arising out of
this Agreement or out of the other Transaction Documents, and it shall not be
necessary for any other purchaser of Units to be joined as an additional party
in any proceeding for such purpose.

         6. Prospectus Delivery Requirement. The Purchaser hereby covenants with
the Company not to make any sale of the Units or the Securities without
complying with the provisions hereof and of the Registration Rights Agreement,
and without effectively causing the prospectus delivery requirement under the
Securities Act to be satisfied (unless the Purchaser is selling such Units or
Securities in a transaction not subject to the prospectus delivery requirement).

         7. Shareholder Approval. The Company represents and warrants to the
Purchaser that the vote of the Company's Stockholders will not be required to
approve the issuance of the Units.

         8. Indemnification of Purchaser. In addition to the indemnity provided
in the Registration Rights Agreement, the Company will indemnify and hold the
Purchaser and its directors, officers, shareholders, members, managers,
partners, employees and agents (each, a "Purchaser Party") harmless from any and
all losses, liabilities, obligations, claims, contingencies, damages, costs and
expenses, including all judgments, amounts paid in settlements, court costs, and
reasonable attorneys' fees and costs of investigation (collectively, "Losses")
that any such Purchaser Party may suffer or incur as a result of or relating to
any misrepresentation, breach, or inaccuracy of any representation, warranty,
covenant, or agreement made by the Company in any Transaction Document. In
addition to the indemnity contained herein, the Company will reimburse each
Purchaser Party for its reasonable legal and other expenses (including the cost
of any investigation, preparation, and travel in connection therewith) incurred
in connection therewith, as such expenses are incurred.

         9. Form 8-K/Non-Public Information. No later than the first trading day
following the Closing Date, the Company shall file a Current Report on Form 8-K
disclosing the consummation of the transactions contemplated by this Agreement
and attaching copies of the related agreements, and disclosing any and all
material non-public information that has been communicated to the Purchaser by
or on behalf of the Company in connection with the transactions contemplated by
this Agreement. In addition, the Company shall make such other filings and
notices in the manner and time required by the SEC in connection with the
consummation of the transactions contemplated by this Agreement. Subsequent to
the Closing, the Company covenants and agrees that neither it nor any other
person acting on its behalf will provide Purchaser or its agents or counsel with
any information that the Company believes constitutes material non-public
information, unless prior thereto Purchaser shall have executed a written
agreement regarding the confidentiality and use of such information. The Company
understands and confirms that Purchaser shall be relying on the foregoing
representations in effecting transactions in securities of the Company.

         10. Further Assurances. The parties hereto will, upon reasonable
request, execute and deliver all such further assignments, endorsements and
other documents as may be necessary in order to perfect the purchase by the
Purchaser of the Units.

         11. Entire Agreement; No Oral Modification. This Agreement contains the
entire agreement among the parties hereto with respect to the subject matter
hereof and supersedes all prior agreements and understandings with respect
thereto and may not be amended or modified except in a writing signed by both of
the parties hereto.

         12. Binding Effect; Benefits. This Agreement shall inure to the benefit
of and be binding upon the parties hereto and their respective heirs, successors
and assigns; however, nothing in this Agreement, expressed or implied, is
intended to confer on any other person other than the parties hereto, or their
respective heirs, successors or assigns, any rights, remedies, obligations or
liabilities under or by reason of this Agreement.

         13. Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall be deemed to be one and the same instrument.

         14. Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York and the United States of
America, both substantive and remedial. Any judicial proceeding brought against
either of the parties to this agreement or any dispute arising out of this
Agreement or any matter related hereto shall be brought in the courts of the
State of New York, New York County, or in the United States District Court for
the Southern District of New York and, by its execution and delivery of this
agreement, each party to this Agreement accepts the jurisdiction of such courts.

         15. Prevailing Parties. In any action or proceeding brought to enforce
any provision of this Agreement, or where any provision hereof is validly
asserted as a defense, the prevailing party shall be entitled to receive and the
nonprevailing party shall pay upon demand reasonable attorneys' fees in addition
to any other remedy.

         16. Notices. All communication hereunder shall be in writing and, if
sent to you shall be mailed, delivered, telegraphed or sent by facsimile or
electronic mail, and confirmed to a Purchaser at the address set forth on the
signature page of this Agreement, or if sent to the Company, shall be mailed,
delivered, telegraphed or sent by facsimile or electronic mail and confirmed to
the Company at 2900 Davis Boulevard, Suite 130, Joplin, Missouri 64804,
Attention: Henry P. Hoffman, Chairman, President and Chief Executive Officer,
Facsimile: (203) 359-4115, e-mail: hank.hoffman@siricomm.com, with a copy to
Joel Schneider, Esq. at Sommer & Schneider LLP, 595 Stewart Avenue, Suite 710,
Garden City, New York 11530, Facsimile: (516) 228-8211, e-mail:
jschneider@ssllplaw.net.

         17. Headings. The section headings herein are included for convenience
only and are not to be deemed a part of this Agreement.

                          [Signature on following page]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.

                                                     SIRICOMM, INC.

                                                     By:
                                                     ---------------------------
                                                     Name:
                                                     Its:

                     [Counterpart Signature Pages Attached]

<PAGE>

              Counterpart Signature Page to Subscription Agreement

                                        INVESTOR

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

                                        By:
                                           -------------------------------------

                                        ----------------------------------------
                                        Print Name and Title

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

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

                                        ----------------------------------------
                                        Principal Residence or Executive Office

                                        ----------------------------------------
                                        IRS Tax Identification No.

                                        ----------------------------------------
                                        Telephone Number

                                        ----------------------------------------
                                        Fax Number

                                        ----------------------------------------
                                        E-mail Address

                     X     $                    =     $
-------------------        -----------------          ------------------------
 Number of Units           Price per Unit             Purchase Price

<PAGE>

                                                                       Exhibit A

                        [Copy of Investor Questionnaire]

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