Exhibit 4.2


 


THIS WARRANT AND THE UNDERLYING SECURITIES
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER THE SECURITIES LAWS
OF ANY STATE. THESE SECURITIES MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED UNDER
THE ACT AND APPLICABLE STATE SECURITIES LAWS IN ACCORDANCE WITH APPLICABLE REGISTRATION REQUIREMENTS OR AN EXEMPTION THEREFROM.
THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE ISSUER THAT SUCH OFFER, SALE, TRANSFER,
PLEDGE OR HYPOTHECATION OTHERWISE COMPLIES WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.


 


FOR RESIDENTS OF CANADA ONLY: UNLESS
PERMITTED UNDER SECURITIES LEGISLATION, THE HOLDER OF THIS SECURITY MUST NOT TRADE THE SECURITY BEFORE THE DATE THAT IS 4 MONTHS
AND A DAY AFTER THE ORIGINAL ISSUE DATE SET FORTH BELOW.


 


WITHOUT PRIOR WRITTEN APPROVAL OF TSX VENTURE
EXCHANGE AND COMPLIANCE WITH ALL APPLICABLE SECURITIES LEGISLATION, NEITHER THIS WARRANT NOR THE WARRANT SHARES MAY BE SOLD, TRANSFERRED,
HYPOTHECATED OR OTHERWISE TRADED ON OR THROUGH THE FACILITIES OF TSX VENTURE EXCHANGE OR OTHERWISE IN CANADA OR TO OR FOR THE BENEFIT
OF A CANADIAN RESIDENT UNTIL FOUR MONTHS FROM THE ORIGINAL ISSUE DATE SET FORTH BELOW.


 


COHBAR, INC.


 


NONTRANSFERABLE

COMMON STOCK PURCHASE WARRANT


 


	Warrant No. 2018 – [__]	Original Issue Date: March [__], 2018 (“Original Issue Date”)


 


COHBAR, INC.,
a Delaware corporation (the “Company”), hereby certifies that, for value received, [NAME] (the “Holder”),
is entitled to purchase from the Company up to a total of [__] shares of common stock, $0.001 par value (the “Common Stock”),
of the Company (each such share, a “Warrant Share” and all such shares, the “Warrant
Shares”) at the Exercise Price (defined below) at any time and from time to time on or after the Original Issue Date
and through and including 5:00 P.M., New York City time, on March 29, 2021 (the “Expiration Date”), subject
to Section 3.1(c), and further subject to the following terms and conditions. All such warrants are referred to herein,
collectively, as the “Warrants.”


 


1. Definitions.


 


“Affiliate”
of a person means a person that, directly or indirectly through one or more intermediaries, controls, is controlled by, or is under
common control with, the person specified.


 


“Exercise Price”
means an amount equal to USD $5.30 per share (as may be adjusted from time to time as provided herein).


 


“Person”
means an individual, a limited liability company, a partnership, a joint venture, a corporation, a trust, an unincorporated organization
and a government or any department or agency thereof.


 


“Trading Day”
means any day on which trading of the Common Stock occurs on the applicable Trading Market.


 


“Trading Market”
means the TSX Venture Exchange, the NASDAQ capital market or another national securities exchange (as defined in Securities Exchange
Act of 1934, as amended) on which the Company’s Common Stock may be listed, or, if the Company’s Common Stock is not
then listed on the TSX Venture Exchange, the NASDAQ capital market or a national securities exchange, then such exchange or quotation
system on which the Common Stock then primarily trades.


 






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2. No
Transfer. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose
(the “Warrant Register”), in the name of Holder. This Warrant may not be assigned or transferred by
Holder.


 


3. Exercise
and Duration of Warrants.


 


(a) All or any part
of this Warrant shall be exercisable by Holder in any manner permitted by Section 9 hereof at any time and
from time to time on or after the Original Issue Date and through and including the Expiration Date. At 5:00 p.m., New York City
time, on the Expiration Date, the portion of this Warrant not exercised prior thereto shall be and become void and of no value
and this Warrant shall be terminated and no longer outstanding.


 


(b) The Holder may
exercise this Warrant by delivering to the Company (i) an exercise notice, in the form attached hereto (the “Exercise
Notice”), completed and duly signed, and (ii) payment of the Exercise Price for the number of Warrant Shares as
to which this Warrant is being exercised in the manner indicated on the Exercise Notice. The date such items are delivered to the
Company (as determined in accordance with the notice provisions hereof) is an “Exercise Date.” The Holder shall
not be required to deliver the original Warrant in order to effect an exercise hereunder. Execution and delivery of the Exercise
Notice shall have the same effect as cancellation of the original Warrant and issuance of a new Warrant (the “New Warrant”)
evidencing the right to purchase the remaining number of Warrant Shares.


 


(c) Notwithstanding the
foregoing, in the event that, on or before the first anniversary of the Original Issue Date, the Company prepays any amounts due
pursuant to that 8% Unsecured Promissory Note Due 2021 issued by the Company to Holder on the Original Issue Date (the “Note”)
and the shares of Common Stock are listed on the TSX Venture Exchange (the “TSXV”) on the date of such prepayment,
the Expiration Date of some or all of this Warrant will be adjusted to be the date of the first anniversary of the Original Issue
Date in accordance with Section 2.2 of Policy 5.1 of the TSXV.


 


4. Delivery
of Warrant Shares.


 


(a) Upon exercise
of this Warrant, the Company shall promptly (but in no event later than three Trading Days after the Exercise Date) issue or cause
to be issued and cause to be delivered to or upon the written order of Holder in such name or names as the Holder may designate
(provided that, if a registration statement registering the resale of the Warrant Shares by the Holder is not then effective and
the Holder directs the Company to deliver a certificate for the Warrant Shares in a name other than that of the Holder or an Affiliate
of the Holder, such delivery shall be subject to Holder’s compliance with Section 13). The Holder, or any Person
permissibly so designated by the Holder to receive Warrant Shares, shall be deemed to have become the holder of record of such
Warrant Shares as of the Exercise Date.


 


(b) To the extent permitted
by law, the Company’s obligations to issue and deliver Warrant Shares in accordance with the terms hereof are absolute and
unconditional, irrespective of any action or inaction by the Holder to enforce the same, any waiver or consent with respect to
any provision hereof, the recovery of any judgment against any Person or any action to enforce the same, or any setoff, counterclaim,
recoupment, limitation or termination, or any breach or alleged breach by the Holder or any other Person of any obligation to the
Company or any violation or alleged violation of law by the Holder or any other Person, and irrespective of any other circumstance
that might otherwise limit such obligation of the Company to the Holder in connection with the issuance of Warrant Shares. Nothing
herein shall limit a Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including,
without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely
deliver certificates representing shares of Common Stock upon exercise of the Warrant as required pursuant to the terms hereof.


 


5. Charges,
Taxes and Expenses. Issuance and delivery of certificates for shares of Common Stock upon exercise of this Warrant shall be
made without charge to the Holder for any issue or transfer tax, withholding tax, transfer agent fee or other incidental tax or
expense in respect of the issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided,
however, that the Company shall not be required to pay any tax that may be payable in respect of any transfer involved in the
registration of any certificates for Warrant Shares or Warrants in a name other than that of the Holder. The Holder shall be responsible
for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon
exercise hereof.


 






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6. Replacement
of Warrant. If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange
and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only upon
receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction and customary and reasonable indemnity
(which shall not include a surety bond), if requested. Applicants for a New Warrant under such circumstances shall also comply
with such other reasonable regulations and procedures and pay such other reasonable third-party costs as the Company may prescribe.
If a New Warrant is requested as a result of a mutilation of this Warrant, then the Holder shall deliver such mutilated Warrant
to the Company as a condition precedent to the Company’s obligation to issue the New Warrant.


 


7. Reservation
of Warrant Shares; Listing. The Company covenants that it will at all times reserve and keep available out of the aggregate
of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of enabling it to issue Warrant Shares
upon exercise of this Warrant as herein provided, the number of Warrant Shares that are then issuable and deliverable upon the
exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of persons other than the
Holder (taking into account the adjustments and restrictions of Section 8 hereof). The Company covenants
that all Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance
with the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable.


 


8. Certain
Adjustments. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to adjustment
from time to time as set forth in this Section 8.


 


(a) Stock
Dividends and Splits. If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its
Common Stock or otherwise makes a distribution on any class of capital stock that is payable in shares of Common Stock; (ii) subdivides
outstanding shares of Common Stock into a larger number of shares; or (iii) combines outstanding shares of Common Stock into
a smaller number of shares, then in each such case the Exercise Price shall be multiplied by a fraction of which the numerator
shall be the number of shares of Common Stock outstanding immediately before such event and of which the denominator shall be the
number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to clause (i) of this
paragraph shall become effective immediately after the record date for the determination of stockholders entitled to receive such
dividend or distribution, and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective
immediately after the effective date of such subdivision or combination. 


 


(b) Pro Rata
Distributions. If the Company, at any time while this Warrant is outstanding, distributes to all holders of Common Stock for
no consideration (i) evidences of its indebtedness; (ii) any security (other than a distribution of Common Stock covered
by the preceding paragraph); (iii) rights or warrants to subscribe for or purchase any security; or (iv) any other asset
(including cash) (in each case, “Distributed Property”), then, upon any exercise of this Warrant that occurs
after the record date fixed for determination of stockholders entitled to receive such distribution, the Holder shall be entitled
to receive, in addition to the Warrant Shares otherwise issuable upon such exercise (if applicable), the Distributed Property that
such Holder would have been entitled to receive in respect of such number of Warrant Shares had the Holder been the record holder
of such Warrant Shares immediately prior to such record date.


 


(c) Fundamental
Transactions. If, at any time while this Warrant is outstanding (i) the Company effects any merger or consolidation of the
Company with or into another Person, in which the shareholders of the Company as of immediately prior to the transaction own less
than a majority of the outstanding stock of the surviving entity; (ii) the Company effects any sale of all or substantially
all of its assets in one or a series of related transactions; (iii) any tender offer or exchange offer (whether by the Company
or another Person) is completed pursuant to which holders of a majority of the outstanding shares of Common Stock tender or exchange
their shares for other securities, cash or property; or (iv) the Company effects any reclassification of all outstanding Common
Stock or any compulsory share exchange pursuant to which all outstanding Common Stock is effectively converted into or exchanged
for other securities, cash or property (each, a “Fundamental Transaction”), then the Holder shall have the right
thereafter to receive, upon any subsequent exercise of this Warrant, the same amount and kind of securities, cash or property as
it would have been entitled to receive upon the occurrence of such Fundamental Transaction if it had been, immediately prior to
such Fundamental Transaction, the holder of the number of Warrant Shares then issuable upon exercise in full of this Warrant (the “Alternate
Consideration”). The Company shall not effect any such Fundamental Transaction unless prior to or simultaneously with
the consummation thereof, any successor to the Company, surviving entity or the corporation purchasing or otherwise acquiring such
assets or other appropriate corporation or entity shall assume the obligation to deliver to the Holder, such Alternate Consideration
as, in accordance with the foregoing provisions, the Holder may be entitled to purchase, and the other obligations under this Warrant.


 






    3


     


    

 


(d) Number
of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraph (a) of this Section 8,
the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased proportionately,
so that after such adjustment the aggregate Exercise Price payable hereunder for the adjusted number of Warrant Shares shall be
the same as the aggregate Exercise Price in effect immediately prior to such adjustment.


 


9. Payment
of Exercise Price. The Holder shall pay the Exercise Price by (i) wire transfer to the Company or cashier’s check drawn
on a United States bank made payable to the order of the Company or (ii) provided that the Company’s common stock is not
then listed on the TSXV, by the cancellation of indebtedness of the Company under the Note in an amount equal to the Exercise Price.


 


10. No Fractional
Shares. No fractional Warrant Shares will be issued in connection with any exercise of this Warrant. In lieu of any fractional
shares that would otherwise be issuable, the Company shall pay cash equal to the product of such fraction multiplied by the closing
price of one Warrant Share as reported by the applicable Trading Market on the Exercise Date.


 


11. Notices.
Any and all notices or other communications or deliveries hereunder (including, without limitation, any Exercise Notice) shall
be in writing and shall be deemed given and effective on the earliest of (i) the date of confirmed transmission, if such notice
or communication is delivered via e-mail as specified in this Section 11 at or prior to 5:00 p.m. (New York City
time) on a Trading Day, (ii) the next Trading Day after the date of confirmed transmission, if such notice or communication
is delivered by e-mail as specified in this Section 11 on a day that is not a Trading Day or later than 5:00 p.m.
(New York City time) on any Trading Day, (iii) the Trading Day following the date of mailing, if sent by nationally recognized
overnight courier service, or (iv) upon receipt if sent by mail or other courier. The addresses for such notices or communications
shall be: (a) if to the Company, to CohBar, Inc., 1455 Adams Drive, Suite 2050, Menlo Park, CA 94025, Attention: Chief Financial
Officer, Email: jeff.biunno@cohbar.com (or such other address as the Company shall indicate in writing in accordance with this Section
11) or (b) if to the Holder, to the address or e-mail address appearing on the Warrant Register (or such other address
as the Holder shall indicate in writing in accordance with this Section 11).


 


12. Warrant
Agent. The Company shall serve as warrant agent under this Warrant. Upon 10 days’ notice to the Holder, the Company
may appoint a new warrant agent. Any corporation into which the Company or any new warrant agent may be merged or any corporation
resulting from any consolidation to which the Company or any new warrant agent shall be a party or any corporation to which the
Company or any new warrant agent transfers substantially all of its corporate trust or shareholders services business shall be
a successor warrant agent under this Warrant without any further act. Any such successor warrant agent shall promptly cause notice
of its succession as warrant agent to be delivered to the Holder in accordance with Section 11.


 


13. Compliance
with Securities Laws.


 


(a)
The Holder understands that this Warrant and the Warrant Shares are characterized as “restricted securities” under
the federal securities laws inasmuch as they are being acquired from the Company in a transaction not involving a public offering
and that under such laws and applicable regulations this Warrant and the Warrant Shares may be resold without registration under
the Securities Act only in certain limited circumstances. In this connection, the Holder represents that it is familiar with
Rule 144 under the Securities Act, as presently in effect, and understands the resale limitations imposed thereby and by the Securities
Act.


 






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(b)
Prior and as a condition to the sale or transfer of the Warrant Shares issuable upon exercise of this Warrant, the Holder shall
furnish to the Company such certificates, representations, agreements and other information, including an opinion of counsel, as
the Company or the Company’s transfer agent reasonably may require to confirm that such sale or transfer is being made pursuant
to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act, unless such Warrant
Shares are being sold or transferred pursuant to an effective registration statement.


 


(c)
The Holder acknowledges that the Company may place a restrictive legend on the Warrant Shares issuable upon exercise of this Warrant
in order to comply with applicable securities laws, in substantially the following form and substance, unless such Warrant Shares
are otherwise freely tradable under Rule 144 of the Securities Act, the rules of the TSX Venture Exchange, and applicable Canadian
securities legislation, as applicable.


 


THESE SECURITIES HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER THE SECURITIES LAWS OF ANY STATE. THESE SECURITIES
MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED UNDER THE ACT AND APPLICABLE STATE
SECURITIES LAWS IN ACCORDANCE WITH APPLICABLE REGISTRATION REQUIREMENTS OR AN EXEMPTION THEREFROM. THE ISSUER OF THESE SECURITIES
MAY REQUIRE AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE ISSUER THAT SUCH OFFER, SALE, TRANSFER, PLEDGE OR HYPOTHECATION
OTHERWISE COMPLIES WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.


 


FOR RESIDENTS OF CANADA ONLY:
UNLESS PERMITTED UNDER SECURITIES LEGISLATION, THE HOLDER OF THIS SECURITY MUST NOT TRADE THE SECURITY BEFORE THE DATE THAT IS
4 MONTHS AND A DAY AFTER MARCH [__], 2018.


 


WITHOUT PRIOR WRITTEN APPROVAL OF TSX
VENTURE EXCHANGE AND COMPLIANCE WITH ALL APPLICABLE SECURITIES LEGISLATION, NEITHER THESE SECURITIES MAY BE SOLD, TRANSFERRED,
HYPOTHECATED OR OTHERWISE TRADED ON OR THROUGH THE FACILITIES OF TSX VENTURE EXCHANGE OR OTHERWISE IN CANADA OR TO OR FOR THE BENEFIT
OF A CANADIAN RESIDENT UNTIL FOUR MONTHS FROM MARCH [__], 2018.


 


14. Miscellaneous.


 


(a) This Warrant
shall be binding on and inure to the benefit of the parties hereto and their respective successors and assigns. Subject to the
preceding sentence, nothing in this Warrant shall be construed to give to any Person other than the Company and the Holder any
legal or equitable right, remedy or cause of action under this Warrant. This Warrant may be amended only in writing signed by the
Company and the Holder, or their successors and assigns.


 


(b) All questions
concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed by and construed and enforced
in accordance with the internal laws of the State of Delaware, without regard to the principles of conflicts of law thereof. Each
party agrees that all legal proceedings concerning the interpretations, enforcement and defense of this Warrant and the transactions
herein contemplated (“Proceedings”) (whether brought against a party hereto or its respective Affiliates, employees
or agents) shall be commenced exclusively in the courts of the State of Delaware or the federal courts located therein (the “Delaware
Courts”). Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the Delaware Courts for the adjudication
of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby
irrevocably waives, and agrees not to assert in any Proceeding, any claim that it is not personally subject to the jurisdiction
of any Delaware Court, or that such Proceeding has been commenced in an improper or inconvenient forum. Each party hereto hereby
irrevocably waives personal service of process and consents to process being served in any such Proceeding by mailing a copy thereof
via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices
to it under this Warrant and agrees that such service shall constitute good and sufficient service of process and notice thereof.
Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. Each party
hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any
legal proceeding arising out of or relating to this Warrant or the transactions contemplated hereby. If either party shall commence
a Proceeding to enforce any provisions of this Warrant, then the prevailing party in such Proceeding shall be reimbursed by the
other party for its attorney’s fees and other costs and expenses incurred with the investigation, preparation and prosecution
of such Proceeding.


 






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


 


(d) In case any
one or more of the provisions of this Warrant shall be invalid or unenforceable in any respect, the validity and enforceability
of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby and the parties will
attempt in good faith to agree upon a valid and enforceable provision which shall be a commercially reasonable substitute therefore,
and upon so agreeing, shall incorporate such substitute provision in this Warrant.


 


(e) Prior to exercise
of this Warrant, the Holder hereof shall not, by reason of by being a Holder, be entitled to any rights of a stockholder with respect
to the Warrant Shares.


 


[signature page follows]


 




    6


     


    

 


IN WITNESS WHEREOF,
the Company has caused this Warrant to be issued effective as of the date first indicated above.


 


COHBAR, INC.


 


	By:	 	 
	Name:	 Jeffrey Biunno	 
	Title:	 Chief Financial Officer 	 


 




     


     


    

 


NOTICE OF EXERCISE


To be completed and signed only upon exercise
of Warrant


 


CohBar, Inc.


1455 Adams Drive, Suite 2050,


Menlo Park, CA 94025


Attention: Chief Financial Officer


 


The undersigned Holder
hereby irrevocably elects to exercise the attached Warrant as to:


 


______________ shares of Common Stock of
CohBar, Inc. (the “Company”); and tenders herewith payment of


 


$ ____________ as the exercise price (“Exercise
Price”) thereof by:


 


		☐ 	cash payment, or



		☐	cancellation of Company indebtedness under the Note (as
defined in the Warrant) in an amount equal to the Exercise Price



 


By
its signature below the undersigned Holder hereby represents and warrants that it is an “accredited investor” as defined
in Rule 501(a) of Regulation D promulgated under the Securities Act of 1933, as amended, and agrees to be bound by the terms and
conditions of the attached Warrant as of the date hereof, including Section 13 thereof.


 


The undersigned requests that certificates
representing said shares be issued in the name and delivered to the address specified below:


 


	Print Name:	 	 
	 	 	 
	Address:	 	 
	 	 	 
	 	 	 


 


	 	(Signature must conform in all respects to name of the Holder as specified on the face of the Warrant)
	 	 
	 	 
	 	(Signature)


 


	 	 
	(Date)