EX-10.7





 Exhibit 10.7 

FORM LOCK-UP AGREEMENT 

This LOCK-UP AGREEMENT (this “Agreement”) is made as of May 24, 2021 by and among Big Rock
Partners Acquisition Corp., a Delaware corporation (“BRPA”), and each Person identified on the signature pages hereto (the “Holders”) as of the date hereof. 

RECITALS 
 WHEREAS, BRPA
is party to that certain Agreement and Plan of Merger, dated as of December 13, 2020 (as amended, the “Merger Agreement”), by and among BRPA, Big Rock Merger Corp., a Delaware corporation and wholly owned subsidiary of
BRPA (“Merger Sub”), and NeuroRx, Inc., a Delaware corporation (“NeuroRx”), pursuant to which Merger Sub will merge with and into NeuroRx (with NeuroRx being the surviving entity) (the
“Merger”), and each share of common stock of NeuroRx issued and outstanding immediately prior to the Merger (including shares of common stock issued upon conversion of preferred stock) will be cancelled and converted into the
right to receive shares of common stock, par value $0.001 per share, of BRPA (the “BRPA Common Stock”), on the terms and subject to the conditions set forth in the Merger Agreement; 

WHEREAS, in connection with the transactions contemplated by the Merger Agreement, the Holders have agreed to certain transfer
restrictions on the shares of BRPA Common Stock received as Per Share Merger Consideration (as defined in the Merger Agreement) (the “Shares”) on the terms and conditions set forth herein. 

NOW, THEREFORE, in consideration of the mutual covenants contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties to this Agreement hereby agree as follows: 
 Section 1. Definitions. For purposes of
this Agreement, the following terms shall have the meanings specified in this Section 1: 

“Affiliate” of any Person means any other Person directly or indirectly controlled by, controlling or under common
control with such Person; provided that BRPA and its Subsidiaries shall be deemed not to be Affiliates of any Holder. As used in this definition, “control” (including, with its correlative meanings, “controlling,”
“controlled by” and “under common control with”) as applied to any Person shall mean possession, directly or indirectly, of power to direct or cause the direction of management or policies of such Person (whether through
ownership of securities, by contract or otherwise). 
 “Agreement” has the meaning set forth in the preamble. 

“BRPA” has the meaning set forth in the preamble. 

“BRPA Common Stock” has the meaning set forth in the recitals. 












 “Capital Stock” means (i) with respect to any Person that is a
corporation, any and all shares, interests or equivalents in capital stock of such corporation (whether voting or nonvoting and whether common or preferred), (ii) with respect to any Person that is not a corporation, individual or governmental
entity, any and all partnership, membership, limited liability company or other equity interests of such Person that confer on the holder thereof the right to receive a share of the profits and losses of, or the distribution of assets of, the
issuing Person, and (iii) any and all warrants, rights (including conversion and exchange rights) and options to purchase any security described in the clause (i) or (ii) above. 

“Code” means the U.S. Internal Revenue Code of 1986, as amended. 

“Holders” has the meaning set forth in the preamble. 

“Lock-Up Shares” has the meaning set forth in
Section 2(a). 
 “Lock-Up Term” has the meaning
set forth in Section 2(a). 
 “Merger” has the meaning set forth in the recitals. 

“Merger Agreement” has the meaning set forth in the recitals. 

“Merger Sub” has the meaning set forth in the recitals. 

“NeuroRx” has the meaning set forth in the recitals. 

“Permitted Transferee” means, with respect to any Person, (A) the direct or indirect partners, members, equity
holders or other Affiliates of such Person, (B) any of such Person’s related investment funds or vehicles controlled or managed by such Person or Affiliate of such Person, (C) any of such Person’s or its Affiliates’ officers
or directors, or Affiliates or family members of the Person’s officers or directors, (D) in the case of an individual, such Person’s immediate family or a trust, the beneficiary of which is a member of such Person’s immediate
family, an Affiliate of such Person or a charitable organization, in each case, provided the transfer is a gift; (E) in the case of an individual, a Person who would receive the Shares by virtue of laws of descent and distribution upon death of
such Person; or (F) in the case of an individual, a Person who would receive the Shares pursuant to a qualified domestic relations order. 

“Person” means an individual, a partnership, a corporation, a limited liability company, 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. 

“Registration Rights Agreement” has the meaning set forth in the Merger Agreement. 

“Regulations” means the U.S. Treasury Regulations promulgated under the Code. 

“Shares” has the meaning set forth in the recitals. 












 “Transfer” means to, directly or indirectly, whether in one
transaction or a series of transactions and whether by merger, consolidation, division, operation of law, or otherwise, (i) offer, sell, transfer, assign, pledge, encumber, hypothecate or similarly dispose of, either voluntarily or
involuntarily, or to enter into any contract, option or other arrangement or understanding with respect to the sale, transfer, assignment, pledge, encumbrance, hypothecation or similar disposition of, any interest owned by a Person or any interest
(including a beneficial interest) in, or the ownership, control or possession of, any interest owned by a Person, (ii) enter into any swap, hedging, short sale, or other arrangement that transfers to another, in whole or in part, any of the
economic consequences of ownership of any of Shares or securities convertible into or exercisable or exchangeable for BRPA Common Stock, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise or
(iii) publicly announce any intention to effect any transaction specified in clause (i) or (ii). 
 Section 2. Lock-Up. 
 (a) Each Holder hereby agrees that it will not Transfer any Shares or interest therein
beneficially owned or owned of record by such Holder (collectively, such Holder’s “Lock-Up Shares”) until the earliest to occur of the following (the “Lock-Up Term”): (i) six (6) months after the consummation of the Merger; (ii) with respect to 50% of the Lock-Up Shares, the date upon which the
reported closing price of the Shares equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any twenty (20) trading days within any thirty (30)-trading day period
commencing after the Merger closing (this clause (ii), the “Price Condition”); and (iii) the date following the consummation of the Merger on which BRPA consummates a liquidation, merger, stock exchange or other similar
transaction that results in all of BRPA’s stockholders having the right to exchange such stockholders’ Shares for (or having their Shares converted into) cash, securities or other property (or the right to receive any of the foregoing),
other than any holding company reorganization or a transaction that is intended solely to effect a redomestication. Notwithstanding the foregoing, no Holder may Transfer any Lock-Up Shares for which the Lock-Up Term has terminated as a result of the satisfaction of the Price Condition (x) until the Shelf Registration Statement (as defined in the Registration Rights Agreement) is declared effective by the U.S.
Securities and Exchange Commission or (y) unless pursuant to an available exemption from registration under the Securities Act of 1933, as amended. 

(b) Notwithstanding the foregoing restrictions on Transfer set forth in Section 2(a), each Holder may: 

 

	 	(i)	 Transfer its Lock-Up Shares to any Permitted Transferee; and



  

	 	(ii)	 exercise any options or warrants to purchase shares of BRPA Common Stock (which exercises may be effected on a
cashless basis to the extent the instruments representing such options or warrants permit exercises on a cashless basis); provided, however, that such Holder shall otherwise comply with any restrictions on Transfer applicable to such
underlying shares of BRPA Common Stock; 


  

	 	(iii)	 enter any trading plan providing for the sale of shares of BRPA Common Stock by such Holder, which trading plan
meets the requirements of Rule 10b5-1(c) under the Securities Exchange Act of 1934, as it may be amended from time to time; provided, however, that such plan does not provide for, or permit, the
sale of any BRPA Common Stock during the Lock-Up Term and no public announcement or filing is voluntarily made or required regarding such plan during the Lock-Up Term;















 provided, however, that in the case of any Transfer or distribution pursuant to Subsection
2(b)(i), (x) in each case, such Permitted Transferees must enter into a written agreement agreeing to be bound by this Agreement, including the restrictions on Transfer set forth in Section 2(a), and (y) such
Permitted Transferee (other than a Permitted Transferee as defined in clause (E) or (F) of the definition of Permitted Transferee) agrees to promptly Transfer such Lock-Up Shares back to such Holder if
such Permitted Transferee ceases to be a Permitted Transferee for any reason prior to the date such Lock-Up Shares become freely transferable. 

(c) Each of the Holders acknowledges and agrees that any purported Transfer of Lock-Up Shares in
violation of this Agreement shall be null and void ab initio, and BRPA shall not be required to register any such purported Transfer. 

(d) Each of the Holders agrees and consents to the entry of stop transfer instructions with BRPA’s transfer agent and registrar against
the Transfer of the Shares except in compliance with the foregoing restrictions and to the addition of a legend to such Holder’s Shares describing the foregoing restrictions. 

Section 3. General Provisions. 
 (a)
Amendments and Waivers. The provisions of this Agreement may be amended, modified or waived only with the prior written consent of BRPA and Holders representing a majority of the Lock-Up Shares;
provided that (i) no such amendment, modification or waiver that would adversely affect a Holder in a manner that is different from any other Holder shall be effective against such Holder without the prior written consent of such Holder
and (ii) if any amendment, modification, waiver or release of this Agreement provides any Holder with rights superior to the rights provided to other Holders, such amendment, modification or waiver shall provide such rights to all Holders of Lock-Up Shares. The failure or delay of any Person to enforce any of the provisions of this Agreement shall in no way be construed as a waiver of such provisions and shall not affect the right of such Person
thereafter to enforce each and every provision of this Agreement in accordance with its terms. A waiver or consent to or of any breach or default by any Person in the performance by that Person of his, her or its obligations under this Agreement
shall not be deemed to be a consent or waiver to or of any other breach or default in the performance by that Person of the same or any other obligations of that Person under this Agreement. 

(b) Remedies. The parties to this Agreement and their successors and assigns shall be entitled to enforce their rights under this
Agreement specifically (without posting a bond or other security), to recover damages caused by reason of any breach of any provision of this Agreement and to exercise all other rights existing in their favor. The parties hereto and their successors
and assigns agree and acknowledge that a breach of this Agreement would cause irreparable harm and money damages would not be an adequate remedy for any such breach and that, in addition to any other rights and remedies existing hereunder, any party
shall be entitled to specific performance and/or other injunctive relief from any court of law or equity of competent jurisdiction (without posting any bond or other security) in order to enforce or prevent violation of the provisions of this
Agreement. 
 (c) Severability. Whenever possible, each provision of this Agreement shall 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 prohibited, invalid, illegal or unenforceable in any respect under any applicable law or regulation in any jurisdiction, such prohibition, invalidity,
illegality or unenforceability shall not affect the validity, legality or enforceability of any other provision of this Agreement in such jurisdiction or in any other jurisdiction, but this Agreement shall be reformed, construed and enforced in such
jurisdiction as if such prohibited, invalid, illegal or unenforceable provision had never been contained herein. 












 (d) Entire Agreement. Except as otherwise provided herein, this Agreement contains
the complete agreement and understanding among the parties hereto with respect to the subject matter hereof and supersedes and preempts any prior understandings, agreements or representations by or among the parties hereto, written or oral, which
may have related to the subject matter hereof in any way. 
 (e) Successors and Assigns. This Agreement shall bind and inure to the
benefit and be enforceable by BRPA and its successors and assigns and the Holders and their respective successors and assigns (whether so expressed or not). In addition, whether or not any express assignment has been made, the provisions of this
Agreement which are for the benefit Holders are also for the benefit of, and enforceable by, any subsequent or successor Holder. 
 (f)
Notices. Any notice, demand or other communication to be given under or by reason of the provisions of this Agreement shall be in writing and shall be deemed to have been given or delivered (i) when delivered personally to the recipient,
(ii) when sent by confirmed electronic mail if sent during normal business hours of the recipient but, if not, then on the next Business Day, (iii) one Business Day after it is sent to the recipient by reputable overnight courier service
(charges prepaid) or (iv) three Business Days after it is mailed to the recipient by first class mail, return receipt requested. Such notices, demands and other communications shall be sent to BRPA at the address specified below and to any
other party subject to this Agreement at such address as indicated on the signature pages hereto, or at such address or to the attention of such other Person as the recipient party has specified by prior written notice to the sending party or as is
on file for such Person at BRPA. Any party may change such party’s address for receipt of notice by providing prior written notice of the change to the sending party as provided herein. 

BRPA’s address is: 
 Big Rock
Partners Acquisition Corp. 
 2645 N. Federal Highway, Suite 230 

Delray Beach, FL 33483 
 Attn:
Richard Ackerman 
 Email: rackerman@bigrockpartners.com 

With a copy to: 
 Graubard Miller

 The Chrysler Building 
 405
Lexington Avenue, 11th Floor 
 New York, New York 10174 

Attention:    David Alan Miller / Jeffrey M. Gallant 

E-mail:        dmiller@graubard.com / jgallant@graubard.com

 and: 












 Alessandra Daigneault 

Email: adaigneault@neurorxpharma.com 
 or to such
other address or to the attention of such other Person as BRPA has specified by prior written notice to the sending party. 
 (g)
Governing Law. All issues and questions concerning the construction, validity, interpretation and enforcement of this Agreement and the exhibits and schedules hereto, and the relative rights of BRPA and the Holders hereunder, shall be
governed by, and construed in accordance with, the laws of the State of Delaware, without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of Delaware or any other jurisdiction) that would cause the
application of the laws of any jurisdiction other than the State of Delaware. 
 (h) MUTUAL WAIVER OF JURY TRIAL. AS A SPECIFICALLY
BARGAINED FOR INDUCEMENT FOR EACH OF THE PARTIES HERETO TO ENTER INTO THIS AGREEMENT (AFTER HAVING THE OPPORTUNITY TO CONSULT WITH COUNSEL), EACH PARTY HERETO EXPRESSLY WAIVES THE RIGHT TO TRIAL BY JURY IN ANY LAWSUIT OR PROCEEDING RELATING TO OR
ARISING IN ANY WAY FROM THIS AGREEMENT OR THE MATTERS CONTEMPLATED HEREBY. 
 (i) CONSENT TO JURISDICTION AND SERVICE OF PROCESS. EACH
OF THE PARTIES, AND EACH OF THEIR SUCCESSORS AND ASSIGNS, IRREVOCABLY SUBMITS TO THE EXCLUSIVE JURISDICTION OF THE COURT OF CHANCERY OF THE STATE OF DELAWARE OR, ONLY IF SUCH COURT LACKS JURISDICTION, THE STATE OR FEDERAL COURTS IN THE STATE OF
DELAWARE, FOR THE PURPOSES OF ANY SUIT, ACTION OR OTHER PROCEEDING ARISING OUT OF THIS AGREEMENT, ANY RELATED AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY OR THEREBY. EACH OF THE PARTIES HERETO, AND EACH OF THEIR SUCCESSORS AND ASSIGNS, FURTHER
AGREES THAT SERVICE OF ANY PROCESS, SUMMONS, NOTICE OR DOCUMENT BY U.S. REGISTERED MAIL TO SUCH PARTY’S RESPECTIVE ADDRESS SET FORTH ABOVE SHALL BE EFFECTIVE SERVICE OF PROCESS FOR ANY ACTION, SUIT OR PROCEEDING WITH RESPECT TO ANY MATTERS TO
WHICH IT HAS SUBMITTED TO JURISDICTION IN THIS PARAGRAPH. EACH OF THE PARTIES HERETO, AND EACH OF THEIR SUCCESSORS AND ASSIGNS, IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY OBJECTION TO THE LAYING OF VENUE OF ANY ACTION, SUIT OR PROCEEDING ARISING OUT
OF THIS AGREEMENT, ANY RELATED DOCUMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY IN THE AFOREMENTIONED COURTS, AND HEREBY AND THEREBY FURTHER IRREVOCABLY AND UNCONDITIONALLY WAIVES AND AGREES NOT TO PLEAD OR CLAIM IN ANY SUCH COURT THAT
ANY SUCH ACTION, SUIT OR PROCEEDING BROUGHT IN ANY SUCH COURT HAS BEEN BROUGHT IN AN INCONVENIENT FORUM. 
 (j) Descriptive Headings;
Interpretation. The descriptive headings of this Agreement are inserted for convenience only and do not constitute a part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by
limitation. 












 (k) No Strict Construction. The language used in this Agreement shall be deemed to be
the language chosen by the parties hereto to express their mutual intent, and no rule of strict construction shall be applied against any party. 

(l) Counterparts. This Agreement may be executed in multiple counterparts, any one of which need not contain the signature of more than
one party, but all such counterparts taken together shall constitute one and the same agreement. 
 (m) Electronic Delivery. This
Agreement, the agreements referred to herein, and each other agreement or instrument entered into in connection herewith or therewith or contemplated hereby or thereby, and any amendments hereto or thereto, to the extent executed and delivered by
means of a photographic, photostatic, facsimile or similar reproduction of such signed writing using a facsimile machine or electronic mail shall be treated in all manner and respects as an original agreement or instrument and shall be considered to
have the same binding legal effect as if it were the original signed version thereof delivered in person. At the request of any party hereto or to any such agreement or instrument, each other party hereto or thereto shall re-execute original forms thereof and deliver them to all other parties. No party hereto or to any such agreement or instrument shall raise the use of a facsimile machine or electronic mail to deliver a signature or
the fact that any signature or agreement or instrument was transmitted or communicated through the use of a facsimile machine or electronic mail as a defense to the formation or enforceability of a contract and each such party forever waives any
such defense. 
 (n) Further Assurances. In connection with this Agreement and the transactions contemplated hereby, each Holder shall
execute and deliver any additional documents and instruments and perform any additional acts that may be necessary or appropriate to effectuate and perform the provisions of this Agreement and the transactions contemplated hereby. 

(o) Dilution. If, from time to time, there is any change in the capital structure of BRPA by way of a stock split, stock dividend,
combination or reclassification, or through a merger, consolidation, reorganization or recapitalization, or by any other means, appropriate adjustment shall be made in the provisions hereof so that the rights and privileges granted hereby shall
continue. 
 [signature pages follow] 












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

			
	 BIG ROCK PARTNERS ACQUISITION CORP.

 

	 By:
	 	 /s/ Richard Ackerman

		 	 Name: Richard Ackerman

		 	 Title: Chief Executive Officer



  

			
	 JONATHAN JAVITT LIVING TRUST

 

	 By:
	 	 /s/ Jonathan Javitt

		 	 Name: Jonathan Javitt

		 	 Title: Trustee

		 	


  

			
	Address:	 	  

	             

	 

             



  

			
	 GLYTECH INC. LLC

 

	 By:
	 	 /s/ Daniel Javitt

		 	 Name: Daniel Javitt

		 	 Title: Authorized
Signatory



  

			
	Address: