Document:

Restricted Stock Purchase Agreement

 Exhibit 10.6 
  
 RESTRICTED STOCK PURCHASE AGREEMENT 
  
 THIS RESTRICTED STOCK PURCHASE AGREEMENT (this “Agreement”) is made as of February 9, 2005, between
Avicena Group, Inc., a Delaware corporation (the “Company”), and Nasser Menhall (“Recipient”). 
  
 The Company and Recipient desire to enter into an agreement pursuant to which Recipient will be granted, an aggregate of 516,326 shares of the
Company’s Common Stock (the “Common Stock”). All of such shares of Common Stock are referred to herein as “Recipient Shares or the “Shares.” Recipient Shares will also include shares of the
Company’s capital stock or other securities of the Company issued with respect to Recipient Shares by way of a stock split, dividend or other recapitalization or reclassification. Certain definitions are set forth in Section 10 of this
Agreement. 
  
 The parties hereto agree as follows: 
  
 1. Recipient Shares. 
  
 (a) Upon execution of this Agreement, Recipient will be granted 516,326
shares of Common Stock. The purchase price for such Shares will be deemed to be zero. The Secretary of the Company shall hold the certificate representing the Recipient Shares, properly endorsed for transfer, until such time as Recipient fulfills
the service requirements of Section 2. 
  
 (b) Within
thirty (30) days after the grant to the Recipient of Recipient Shares pursuant to this Agreement, Recipient will make an effective election with the Internal Revenue Service under Section 83(b) of the Internal Revenue Code and the regulations
promulgated thereunder in the form of Exhibit A attached hereto. 
  
 (c) In connection with the grant of the Recipient Shares pursuant hereto, Recipient represents and warrants to the Company that: 
  
 (i) The Recipient Shares to be acquired by Recipient pursuant to this Agreement will be acquired for Recipient’s own account and not
with a view to, or intention of, distribution thereof in violation of the Securities Act, or any applicable state securities laws, and the Recipient Shares will not be disposed of in contravention of the Securities Act or any applicable state
securities laws; 
  
 (ii) Recipient is the
Chairman of the Company, is sophisticated in financial matters and is able to evaluate the risks and benefits of the investment in the Recipient Shares; 
  
 (iii) Recipient is aware that the investment in the Company is a speculative investment which has limited liquidity and is subject to the
risk of complete loss. Recipient is able to bear the economic risk of his or her investment in the Recipient Shares for an indefinite period of time because the Recipient Shares have not been registered under the Securities Act and, therefore,
cannot be sold unless subsequently registered under the Securities Act or an exemption from such registration is available; 

 (iv) Recipient has had an opportunity to ask questions and receive answers concerning the
terms and conditions of the offering of the Recipient Shares and has had full access to such other information concerning the Company as he or she has requested; 
  
 (v) Recipient has the full right, power and authority to execute and deliver this Agreement, and to perform
his or her obligations hereunder. This Agreement constitutes the valid and legally binding obligations of the Recipient enforceable against him or her in accordance with its terms, except as the same may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium or other laws relating to or affecting the enforcement of creditors’ rights generally, now or hereafter in effect and subject to the application of equitable principles and the availability of equitable
remedies, and the execution, delivery and performance of this Agreement by Recipient does not and will not conflict with, violate or cause a breach of any agreement, contract or instrument to which Recipient is a party or any judgment, order or
decree to which Recipient is subject; 
  
 (vi) In
connection with any underwritten public offering by the Company of its equity securities pursuant to an effective registration statement filed under the Securities Act (a “Public Offering”), the Recipient agrees that he or she shall
not, directly or indirectly, sell, make any short sale of, loan, hypothecate, pledge, offer, grant or sell any option or other contract for the purchase of, purchase any option or other contract for the sale of, or otherwise dispose of or transfer,
or agree to engage in any of the foregoing transactions with respect to, any Recipient Shares acquired hereunder without the prior written consent of the Company or its underwriters. Such restriction (the “Market Stand-Off”) shall
be in effect for such period of time following the date of the final prospectus for the offering as may be requested by the Company or such underwriters but in no event longer than 365 days. Recipient further agrees to execute any agreement
reflecting such Market Stand-Off, as may be requested by the Company or such underwriters. In order to enforce the Market Stand-Off, the Company may impose stop-transfer instructions with respect to the Recipient Shares until the end of the
applicable standoff period. The Company’s underwriters shall be beneficiaries of this Agreement; 
  
 (vii) Recipient is not a party to or bound by any employment agreement, noncompete agreement or confidentiality agreement which conflicts
with the obligations set forth in this Agreement; and 
  
 (viii) Recipient is a resident of the State of             . 
  
 (d) As an inducement for the Company to commit to issue the Recipient Shares to Recipient, and as a condition thereto, Recipient acknowledges and agrees
that neither any future issuance of capital stock of the Company to Recipient nor any provision contained herein shall entitle Recipient to remain in the service of the Company, or any affiliate of the Company, or affect the right of the Company or
any of its affiliates to terminate Recipient’s service at any time for any reason. 

 2. Vesting of Shares. 
  
 (a) The Recipient Shares purchased hereunder will become vested as follows: fifty percent (50%) of the Recipient Shares
shall become vested on the first anniversary of this Agreement, and an additional twenty-five percent (25%) of the Recipient Shares shall become vested on each of the second and third anniversaries of this Agreement, so long as the Recipient
continues to provide services for the Company on each such vesting date. Upon the termination of the Recipient’s services for any or no reason, all vesting of the Recipient Shares shall cease. The foregoing notwithstanding, if the
Recipient’s services are terminated by the Company without Due Cause, then all Unvested Shares shall become Vested Shares as of the date of such termination. 
  
 (b) Recipient Shares which have become vested hereunder are referred to herein as “Vested Shares,” and all
other Recipient Shares are referred to herein as “Unvested Shares.” 
  
 (c) The Recipient Shares shall at all times be subject to such restrictions or limitations with respect to the Transfer thereof that may be contained herein or as otherwise provided by law. 
  
 (d) Recipient shall have the right to vote the Recipient Shares and to
receive dividends and other distributions thereon unless and until, the Unvested Shares are forfeited pursuant to Section 2(a) hereof; provided, however, that a dividend or other distribution with respect to Unvested Shares (including,
without limitation, a stock dividend or stock split), other than a regular cash dividend, shall be delivered to the Company (and the Recipient shall, if requested by the Company, execute and return one or more irrevocable stock powers related
thereto) and shall be subject to the same restrictions as the Unvested Shares with respect to which such dividend or other distribution was made. 
  
 3. Repurchase Option. 
  
 (a) Except as set forth in Section 2(a), in the event Recipient ceases to be engaged by or provide services for the Company or any of its
affiliates for any reason (a “Separation”), all Unvested Shares will be forfeited and the Vested Shares (whether held by Recipient or one or more of Recipient’s transferees as permitted hereunder) will be subject to repurchase,
in each case by the Company pursuant to the terms and conditions set forth in this Section 3 (the “Repurchase Option”). 
  
 (b) In the event of a Separation, the Vested Shares acquired hereunder shall be subject to repurchase at a purchase price equal to the Fair Market Value
for each such share. 
  
 (c) In the event of a Separation, the
Company may elect to purchase all or any portion of the Vested Shares by delivering written notice (the “Repurchase Notice”) to the holder or holders of such Shares within 60 days after the Separation. The Repurchase Notice will set
forth the number of Vested Shares to be acquired from each holder, the aggregate consideration to be paid for such securities and the time and place for the closing of the transaction. The number of securities to be repurchased by the Company shall
first be satisfied to the extent possible from the Shares held by Recipient at the time of delivery of the Repurchase Notice. If the number of Shares then held by Recipient is less than the total number of such securities which the Company 

 
has elected to purchase, the Company shall purchase the remaining securities elected to be purchased from the other holder(s) of the Shares under this
Agreement, pro rata according to the number of the Shares held by such other holder(s) at the time of delivery of such Repurchase Notice (determined as nearly as practicable to the nearest share). The number of Vested Shares to be repurchased
hereunder will be allocated among the Recipient and the other holders of the Shares (if any) pro rata according to the number of the Shares to be purchased from such Person. 
  
 (d) Notwithstanding anything to the contrary contained in this Agreement, all repurchases of Shares by the Company shall be
subject to applicable restrictions contained in the Delaware General Corporation Law and as may be required by other parties in the Company’s equity financing agreements and agreements evidencing indebtedness for borrowed money, if any. If any
such restrictions prohibit the repurchase of Shares hereunder which the Company is otherwise entitled or required to make, the Company may make such repurchases as soon as it is permitted to do so under such restrictions. 
  
 (e) Notwithstanding anything to the contrary contained in this Agreement, if
Recipient delivers the notice of objection described in the definition of Fair Market Value, or if the Fair Market Value of a Share is otherwise determined to be an amount more than 10% greater than the per share repurchase price for such Shares
originally determined by the Board of Directors, the Company shall have the right to revoke its exercise of the Repurchase Option for all or any portion of the Shares elected to be repurchased by it by delivering notice of such revocation in writing
to the holders of the Shares during (i) the thirty-day period beginning on the date the Company receives Recipient’s written notice of objection and (ii) the thirty-day period beginning on the date the Company is given written notice that the
Fair Market Value of a Share was finally determined to be an amount more than 10% greater than the per share repurchase price for such Shares originally determined by the Board. 
  
 4. Purchase of Shares - Right of First Refusal. 
  
 (a) If the Company does not exercise its option to purchase the Vested Shares of the Recipient upon the Recipient’s
Separation, and if the Recipient or other holder of such Shares subsequently desires following Separation to transfer all or any portion of his or her Shares to any person or entity, and receives a bona fide offer to purchase the same (the
“Offered Shares”), the Recipient shall give at least sixty (60) days’ prior written notice (the “Offer Notice”) to the Company of his or her intention to so transfer the Shares. The Offer Notice shall state (1)
the number of Offered Shares; (2) the name, business, and residence address of the proposed transferee; (3) whether or not the transfer is for valuable consideration and, if so, the consideration (the “Offered Price”); (4) the date
upon which the proposed transfer to the transferee is to be consummated; and (5) all other material terms and conditions of the proposed transfer. A copy of any written agreement between the Recipient or other holder of the Shares and the transferee
(whether executed or not) shall be attached to the Offer Notice. 
  
 (b) From and after the date of the Offer Notice, the Company shall have the option, but no obligation, to purchase the Offered Shares (the “Call”) at the lesser of the Offered Price or the Fair Market Value of the Offered
Shares, and upon the same terms and conditions provided in the Offer Notice, exercisable in the order of priority and within the time periods set forth below: 

 (i) Within forty-five (45) days after the date of the Offer Notice (or until the date the
Fair Market Value is determined, if later), the Company shall have the option, but no obligation, to acquire all of the Offered Shares. The Company shall exercise the Call, if at all, by giving written notice to that effect to the Recipient or other
holder of the Shares within such forty-five (45) day option period or, if later, within fifteen (15) days of the determination of Fair Market Value. The exercise of the Company’s option must, in the aggregate, include the purchase of all of the
Offered Shares or the exercise of such option shall be null and void. 
  
 (ii) If the Company fails to exercise its Call to purchase in the aggregate all of the Offered Shares, the Offered Shares may be transferred to the transferee identified in the Offer Notice during the thirty (30) days
following the date of the proposed transfer, as set forth in the Offer Notice, at the same exact price and on the same exact terms and conditions set forth in the Offer Notice. The effectiveness of such transfer is conditioned upon the transferee
agreeing in writing to be a party to this Agreement and to be bound by all of its terms, conditions, and provisions. If the transfer does not occur in accordance with the terms disclosed in the Offer Notice, such transfer shall be automatically null
and void without any further action being required on the part of the Company, and any attempt to transfer the Offered Shares thereafter without first complying with the terms of this Agreement shall be deemed null and void. 
  
 5. Closing of Repurchase. 
  
 (a) The closing of any Repurchase Option exercised by the Company pursuant
to Section 3 of this Agreement, or any Call exercised by the Company pursuant to Section 4 of this Agreement, shall take place at the offices of the Company on a date not more than thirty (30) days after the delivery of the Repurchase
Notice or exercise of the Call (the “Closing Date”). At the Closing Date, the Company shall be entitled to receive customary representations and warranties from the Recipient or other holder of the Shares regarding the sale of the
Shares, and the Recipient or other holder of the Shares will deliver all stock certificates representing the Shares to be purchased, endorsed for transfer to the Company, or accompanied by an Assignment Separate from Certificate in favor of the
Company. 
  
 (b) The Company shall deliver a certified or bank
cashier’s check, or wire transfer, in the amount of the aggregate purchase price for such Shares or, if the Company so chooses, by a subordinate note or notes payable in three substantially equal annual installments beginning on the six month
anniversary of the closing of such purchase and bearing interest (payable quarterly) at a rate per annum equal to the prime rate as published in The Wall Street Journal from time to time. 
  
 (c) Notwithstanding anything herein to the contrary, the Company shall not be obligated to make any payment pursuant to this
Section 5 if such payment would constitute a violation of applicable law or any covenant of any loan document or similar or other agreement with banks, insurance companies, investors, or third parties by which the Company is bound. In the
event the restrictions and exceptions provided herein come into being, the Company shall use reasonable efforts to cause such covenants restricting such repurchase to be waived or modified, if possible, to the extent necessary to permit such
repurchase to be made; provided that the 

 
Company shall not be obligated hereunder to make any payments to any third parties in order to obtain such waivers or modifications. In the event the
restrictions and exceptions provided herein come into being, the Company shall pay such portion of the applicable payment as it is then able to pay pursuant to the terms hereof, that would not be so restricted, excepted or prohibited. The remainder
of such amount shall be paid at such time as said conditions no longer exist; provided that interest shall be paid on any unpaid amounts hereunder at a borrowing rate equal to the applicable mid-term federal rate in effect on the date the payment of
such amount would otherwise become due hereunder. 
  
 6. Sale
of the Company. 
  
 (a) In the event of an Acquisition Event,
the Recipient agrees to vote the Recipient Shares in favor of the Acquisition Event and, if the Acquisition Event is a sale of the Company’s capital stock, will agree to sell his or her Recipient Shares on the terms and conditions approved by
the Company’s Board. The Recipient will not exercise any statutory dissenters’ right with regard to an Acquisition Event and will take all necessary and desirable actions in connection with the consummation of the Acquisition Event.

  
 (b) Notwithstanding Section 6(a), the right of the
Company to consummate any Acquisition Event structured as a sale of stock is subject to the satisfaction of the conditions that upon the consummation of the Sales Event, the Recipient will receive the same form and amount of consideration for the
Vested Shares as any other shareholder, or if other shareholders are given an option as to the form and amount of consideration to be received, the Recipient will be given the same option. The Unvested Shares, if any, shall, as determined in the
sole discretion of the Company, either continue to vest pursuant to the terms of Section 2 of this Agreement, be forfeited or become fully vested immediately prior to the Sales Event. 
  
 (c) If the Company or any shareholders of the Company enter into any
negotiation or transaction for which Rule 506 (or any similar rule then in effect) under the Securities Act may be available with respect to such negotiation or transaction (including a merger, consolidation or other reorganization), the Recipient
will, to the extent required to comply with Rule 506, appoint a purchaser representative (as such term is defined in Rule 501 under the Securities Act) reasonably acceptable to the Company. If the Recipient appoints the purchaser representative
designated by the Company, the Company will pay the fees of such purchaser representative and if the Recipient declines to appoint the purchaser representative designated by the Company, the Recipient will appoint another purchaser representative
(reasonably acceptable to the Company) and the Recipient will be responsible for the fees of the purchaser representative so appointed. 
  
 (d) The Recipient will bear his or her pro rata share (based upon the number of shares of Common Stock sold in an Acquisition Event) of the costs of such
Acquisition Event to the extent such costs are not otherwise paid by the Company or the acquiring party. Costs incurred by the Recipient and on his or her behalf will not be considered costs of the transaction. 
  
 7. Restrictions on Transfer of Recipient Shares. 
  
 (a) Transfer of Recipient Shares. Except as otherwise set forth in
Sections 3, 4 and 6, the Recipient shall not sell, transfer, convey, exchange, give, assign or pledge all or any part of 

 
the Shares owned by him or her or any securities convertible into or exchangeable for the Shares, whether now owned or later acquired, to any Person (other
than to the Recipient’s spouse and descendants or any trust established solely for the benefit of the Recipient and/or the Recipient’s spouse and/or descendants (“Permitted Transferees”)), provided that all such Permitted
Transferees first agree in writing to comply with the terms and provisions hereof. Recipient may not sell, transfer, convey, exchange, give, assign or pledge all or any part of the Shares while a service provider of the Company, except to a
Permitted Transferee or as otherwise allowed under Section 6. Any attempted transfer not perfected in accordance with this Agreement shall be void and shall not transfer ownership in, title to, or any rights respecting the Shares. 

 
 (b) Termination of Restrictions. With respect to Vested Shares
only, any restrictions and obligations of such Shares set forth in this Agreement will terminate upon a Qualified Public Offering of the Company. 
  
 8. Registration. Recipient understands that the Shares are not currently being registered under the Securities Act by reason of their contemplated
issuance in a transaction exempt from the registration and prospectus delivery requirements of the Securities Act pursuant to Rule 701 thereof. Recipient further agrees that he or she will not sell or otherwise dispose of the Shares unless such sale
or other disposition has been registered or is exempt from registration under the Securities Act and has been registered or qualified or is exempt from registration or qualification under applicable securities laws of any state. Recipient
understands that a restrictive legend consistent with the foregoing, and as set forth in Section 9, will be placed on the certificates evidencing the Shares, and related stop transfer instructions will be noted in the stock transfer records
of the Company and/or its stock transfer agent for the Shares. 
  
 9. Additional Restrictions on Transfer of Recipient Shares. 
  
 (a) Legend. The certificates representing the Recipient Shares will bear a legend in substantially the following form: 
  

“THE SECURITIES REPRESENTED BY THIS CERTIFICATE WERE ORIGINALLY ISSUED AS OF FEBRUARY 9, 2005, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
OF 1933, AS AMENDED (THE “ACT”), AND MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR AN EXEMPTION FROM REGISTRATION THEREUNDER. THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO
SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER, CERTAIN REPURCHASE OPTIONS AND CERTAIN OTHER AGREEMENTS SET FORTH IN A RESTRICTED STOCK PURCHASE AGREEMENT BETWEEN THE COMPANY AND A SERVICE PROVIDER OF THE COMPANY DATED AS OF FEBRUARY 9, 2005. A COPY
OF SUCH AGREEMENT MAY BE OBTAINED BY THE HOLDER HEREOF AT THE COMPANY’S PRINCIPAL PLACE OF BUSINESS WITHOUT CHARGE.” 
  
 (b) Opinion of Counsel. No holder of Recipient Shares may transfer any Recipient Shares (except pursuant to an effective registration statement
under the Securities Act) without 

 
first delivering to the Company an opinion of counsel (reasonably acceptable in form and substance to the Company) that neither registration nor
qualification under the Securities Act and applicable state securities laws is required in connection with such Transfer. 
  
 10. Definitions. 
  
 “Acquisition Event” means any transaction or series of transactions pursuant to which (A) any Person(s) other than the Company and its
affiliates in the aggregate acquire(s) (i) capital stock of the Company possessing the voting power (other than voting rights accruing only in the event of a default, breach or event of noncompliance) to elect a majority of the Company’s board
of directors (whether by merger, consolidation, reorganization, combination, sale or transfer of the Company’s capital stock, shareholder or voting agreement, proxy, power of attorney or otherwise) or (ii) all or substantially all of the
Company’s assets determined on a consolidated basis. 
  
 “Due Cause” means (i) Recipient’s breach of any of Recipient’s obligations under any confidentiality, inventions and non-solicitation agreement or this Agreement; (ii) Recipient’s neglect of, willful
misconduct in connection with the performance of, or refusal to perform his duties on behalf of the Company, which, in the case of neglect or refusal to perform, has not been cured to the Company’s good faith satisfaction within thirty (30)
days after Recipient has been provided notice of the same; (iii) Recipient’s engagement in any conduct which injures the integrity, character or reputation of the Company; or (iv) the Recipient’s commission of an act or acts constituting a
felony, or other act involving dishonesty, disloyalty or fraud against the Company. 
  
 “Fair Market Value” of each Recipient Share as of a relevant date means the average of the closing prices of the sales of the Recipient Shares on all securities exchanges on which such securities may
at the time be listed on that date, or, if there have been no sales or exchange on which the security is listed on any day, the average of the highest bid and lowest asked prices on all nationally-recognized exchanges at the end of such day, or, if
on any day such security is not so listed, the average of the representative bid and asked prices quoted in the NASDAQ System as of 4:00 P.M., New York time, or, if on any day such security is not quoted in the NASDAQ System, of the average of the
highest bid and lowest asked prices on such day in the domestic over-the-counter market as reported by the National Quotation Bureau Incorporated, or any similar successor organization, in each such case averaged over a period of 21 days consisting
of the day as of which the Fair Market Value is being determined and the 20 consecutive business days prior to such day. If at any time such Recipient Shares is not listed on any securities exchange or quoted in the NASDAQ System or the
over-the-counter market, the Fair Market Value will be the fair value of such security determined in good faith by the Board of Directors of the Company (the “Board Calculation”). If the Recipient disagrees with the Board
Calculation, the Recipient may, within 30 days after receipt of the Board Calculation, deliver a notice (an “Objection Notice”) to the Company setting forth the Recipient’s calculation of Fair Market Value. The Board and the
Recipient will negotiate in good faith to agree on such Fair Market Value, but if such agreement is not reached within 30 days after the Company has received the Objection Notice, Fair Market Value shall be determined by an appraiser selected by the
Board, which appraiser shall submit to the Board and the Recipient a report within 30 days of its engagement setting forth such determination. The determination of such appraiser 

 
shall be final and binding upon all parties. The expenses of such appraiser shall be borne by the Recipient unless the appraiser’s valuation is more
than 10% greater than the amount determined by the Board of Directors, in which case, the costs of the appraiser shall be borne by the Company. If the Repurchase Option is exercised within 45 days after a Separation, then Fair Market Value shall be
determined as of the date of such Separation; thereafter, Fair Market Value shall be determined as of the date the Repurchase Option is exercised. 
  
 “Person” means an individual, a partnership, a limited liability company, a corporation, an association, a joint stock company, a trust,
a joint venture, an unincorporated organization and a governmental entity or any department, agency or political subdivision thereof. 
  
 “Public Sale” means any sale pursuant to a registered public offering under the Securities Act or any sale to the public pursuant to Rule
144 promulgated under the Securities Act effected through a broker, dealer or market maker. 
  
 “Qualified Public Offering” means the sale in an underwritten public offering registered under the Securities Act of shares of the Company’s Common Stock with minimum net proceeds of Three
Million Dollars ($3,000,000). 
  
 “Recipient’s Family
Group” means Recipient’s spouse and descendants (whether natural or adopted), any trust solely for the benefit of Recipient and/or Recipient’s spouse and/or descendants and any retirement plan for the Recipient. 
  
 “Securities Act” means the Securities Act of 1933, as
amended from time to time. 
  
 “Transfer” means
to sell, transfer, assign, pledge or otherwise dispose of (whether with or without consideration and whether voluntarily or involuntarily or by operation of law). 
  
 11. Notices. Any notice, consent, waiver and other communications required or permitted pursuant to the provisions of
this Agreement must be in writing and will be deemed to have been properly given (a) when delivered by hand; (b) when sent by telecopier (with acknowledgement of complete transmission), provided that a copy is mailed by U.S. certified mail, return
receipt requested; (c) three (3) days after sent by certified mail, return receipt requested; or (d) one (1) day after deposit with a nationally recognized overnight delivery service, in each case to the appropriate addresses and telecopier numbers
set forth below: 
  

			
	 If to the Company:
	 	 
		
	 Avicena Group, Inc.
	 	 
	 228 Hamilton Avenue
	 	 
	 3rd
Floor
	 	 
	 Palo Alto, CA 94301
	 	 
	Attn: Board of Directors	 	 
	 	 	 
	If to the Recipient:	 	 
		
	 Nasser Menhall
	 	 
	____________________	 	 
		
	____________________	 	 

 Each party will be entitled to specify a different address for the receipt of subsequent notices by giving written notice
thereof to the other party in accordance with this Section 11. 
  
 12. General Provisions. 
  
 (a) Transfers in
Violation of Agreement. Any Transfer or attempted Transfer of any Recipient Shares in violation of any provision of this Agreement shall be null and void, and the Company shall not record such Transfer on its books or treat any purported
transferee of such Recipient Shares as the owner of such securities for any purpose. 
  
 (b) Severability. Whenever possible, each provision of this Agreement will be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement is held to be
invalid, illegal or unenforceable in any respect under any applicable law or rule in any jurisdiction, such invalidity, illegality or unenforceability will not affect any other provision or any other jurisdiction, but this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable provision had never been contained herein. 
  
 (c) Complete Agreement. This Agreement, those documents expressly referred to herein and other documents of even date herewith embody the complete
agreement and understanding among the parties and supersede and preempt any prior understandings, agreements or representations by or among the parties, written or oral, which may have related to the subject matter hereof in any way. Recipient
hereby releases the Company and its affiliates and its and their predecessors from any obligation or liability the Company or any of its affiliates or its or their predecessors owes or owed to Recipient or any of his or her affiliates and related
persons prior to the date hereof. 
  
 (d) Counterparts.
This Agreement may be executed in separate counterparts, each of which is deemed to be an original and all of which taken together constitute one and the same agreement. 
  
 (e) Successors and Assigns. 
  

(i) All Recipient Shares will continue to be Recipient Shares in the hands of any holder other than Recipient, including any of
Recipient’s transferees permitted hereunder (except for the Company and for transferees in a Public Sale). Except as otherwise provided herein, each such other holder of Recipient Shares will succeed to all rights and obligations attributable
to Recipient as a holder of Recipient Shares hereunder. 
  
 (ii) Except as otherwise provided herein, this Agreement shall bind and inure to the benefit of and be enforceable by Recipient, the Company, and their respective successors and assigns (including subsequent holders
of Recipient Shares); provided that the rights and obligations of Recipient under this Agreement shall not be assignable except in connection with a permitted transfer of Recipient Shares hereunder. 
  
 (f) Choice of Law. The Agreement shall be governed by and interpreted
in accordance with the laws of the State of Delaware, without giving effect to the principle, of the conflicts of laws thereof. 

 (g) Remedies. Each of the parties to this Agreement will be entitled to enforce its rights under
this Agreement specifically, to recover damages and costs (including attorney’s fees) caused by any breach of any provision of this Agreement and to exercise all other rights existing in its favor. The parties hereto agree and acknowledge that
money damages may not be an adequate remedy for any breach of the provisions of this Agreement and that any party may in its sole discretion apply to any court of law or equity of competent jurisdiction (without posting any bond or deposit) for
specific performance and/or other injunctive relief in order to enforce or prevent any violations of the provisions of this Agreement. 
  
 (h) Amendment and Waiver. The provisions of this Agreement may be amended and waived only with the prior written consent of the Company and
Recipient. No cause of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement. 
  
 (i) Adjustment. In the event of any stock split, stock dividend, recapitalization, reorganization, merger,
consolidation, combination, exchange of shares, liquidation, spin-off or other similar change in capitalization or event, or any distribution to holders of Shares other than a regular cash dividend, the number and class of Shares shall be
appropriately adjusted by the Company (such adjustment to be made reasonably and in good faith by the Company). If any adjustment would result in a fractional security being subject to this Agreement, the Company shall pay Recipient in connection
with the vesting, if any, of such fractional security, an amount in cash determined by multiplying (i) such fraction (rounded to the nearest hundredth) by (ii) the Fair Market Value on the vesting date. The decision of the Company regarding any such
adjustment shall be final, binding and conclusive. 
  
 (j)
Business Days. If any time period for giving notice or taking action hereunder expires on a day which is a Saturday, Sunday or holiday in the state in which the Company’s chief executive office is located, the time period shall be
automatically extended to the business day immediately following such Saturday, Sunday or holiday. 
  
 (k) Indemnification and Reimbursement of Payments on Behalf of Recipient. The Company shall be entitled to deduct or withhold from any amounts
owing from the Company to the Recipient any federal, state, local or foreign withholding taxes, excise taxes, or employment taxes (“Taxes”) imposed with respect to the Recipient’s compensation or other payments from the Company
or the Recipient’s ownership interest in the Company, including, but not limited to, wages, bonuses, dividends, the receipt or exercise of stock options and/or the receipt or vesting of restricted stock. The Recipient shall indemnify the
Company for any amounts paid with respect to any such Taxes, together with any interest, penalties and related expenses thereto. 
  
 (l) Termination. This Agreement shall survive the termination of Recipient’s services with the Company and shall remain in full force and
effect after such termination. 
  
 (m) Generally Accepted
Accounting Principles; Adjustments of Numbers. Where any accounting determination or calculation is required to be made under this Agreement or the exhibits hereto, such determination or calculation (unless otherwise provided) shall be made in
accordance with United States generally accepted accounting principles, consistently applied. 

 (n) Waiver of Jury Trial. Each of the parties hereto hereby irrevocably waives any and all right
to trial by jury of any claim or cause of action in any legal proceeding arising out of or related to this Agreement or the transactions or events contemplated hereby or any course of conduct, course of dealing, statements (whether verbal or
written) or actions of any party hereto. The parties hereto each agree that any and all such claims and causes of action shall be tried by a court trial without a jury. Each of the parties hereto further waives any right to seek to consolidate any
such legal proceeding in which a jury trial has been waived with any other legal proceeding in which a jury trial cannot or has not been waived. 
  
 IN WITNESS WHEREOF, the parties hereto have executed this Restricted Stock Purchase Agreement as of the date first written above. 
  

			
	AVICENA GROUP, INC.
		
	 By:
	 	 /s/ Belinda Tsao Nivaggioli

	 Name:
	 	 Belinda Tsao Nivaggioli

	 Its:
	 	 CEO

	
	 /s/ Nasser Menhall

	 Nasser MenhallEmployment Agreement

 Exhibit 10.7 
  
 AVICENA GROUP, INC. 
 One Cambridge Center, Fifth Floor 
 Cambridge, MA 02142 
  
 Ms. Belinda Tsao Nivaggioli 
 C/o Avicena Group, Inc. 
 228 Hamilton Avenue, 3rd Floor 
 Palo Alto, CA 94301 
  
 Dear Belinda: 
  
 The purpose of this letter is to confirm the terms by which you shall
continue to be employed by Avicena Group, Inc. (the “Company”). Key points are as follows. 
  
 Position: You will be employed as the Chief Executive Officer. 
  
 Base Salary: Your current annual base salary will be $250,000, earned and payable in substantially equal installments in accordance with the Company’s payroll policy from time to time in effect.

  
 Restricted Stock: Effective February 9, 2005 you were granted 1,571,429
restricted shares of the Company’s common stock. The definitive terms of the grant are governed by the Restricted Stock Purchase Agreement executed between you and the Company. 
  
 Benefits: You will be entitled to participate in the benefit plans and programs generally available from time to time to employees of
the Company, subject to the terms of such plans and programs. 
  
 Employment
Relationship: The terms of this letter agreement do not modify your employment-at-will relationship. It is expressly understood, therefore, that the Company and you are free to terminate your employment relationship at any time. No employee of
the Company, other than Nasser Menhall, has the authority to alter, orally or in writing, the terms of the at-will status of your employment relationship. 
  
 No Other Understandings: This letter sets forth our entire agreement and understanding and supersedes any and all other agreements, either oral or in writing
(including, but not limited to, any agreement and/or understanding pertaining to equity ownership in the Company), between the Company, any of its shareholders, members, and/or principals and you, including, but not limited to, that certain
Employment Agreement dated September 7, 1999 previously executed by you and the Company and that certain employment letter agreement dated February 25, 2005 previously executed between you and the Company. No change to this letter will be valid
unless in writing and signed by the Company and you. The foregoing notwithstanding, you acknowledge and agree that, in consideration for the grant to you of the restricted shares of common stock described herein, you shall continue to be bound by
the terms and conditions of that certain Confidentiality and Noncompetition Agreement previously executed between you and the Company, effective September 7, 1999. 

 Ms. Belinda Tsao Nivaggioli 
 March 3, 2005 
 Page 2 
  
 Governing Law: This offer letter will be governed by
and construed in accordance with the internal laws of the State of Delaware. 
  
 Please confirm your acceptance of the terms of this letter agreement by signing on the space provided below and returning this letter to the Company. 
  

			
	 /s/ Nasser Menhall

	 Nasser Menhall

  
 Accepted this 3rd day of March, 2005. 
  

			
	 /s/ Belinda Tsao Nivaggioli

	 Belinda Tsao Nivaggioli

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