Document:

EX-10.15

 Exhibit 10.15 

THIS WARRANT AND THE UNDERLYING SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT
BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR UNLESS THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT
REQUIRED.  
 THE SALE, PLEDGE, HYPOTHECATION OR TRANSFER OF THIS WARRANT AND THE UNDERLYING SECURITIES IS SUBJECT TO THE TERMS AND CONDITIONS
OF A CERTAIN NOTE AND WARRANT PURCHASE AGREEMENT BY AND BETWEEN THE HOLDER AND THE COMPANY. COPIES OF SUCH AGREEMENT MAY BE OBTAINED UPON WRITTEN REQUEST TO THE SECRETARY OF THE COMPANY. 

AUSPEX PHARMACEUTICALS, INC. 

WARRANT TO PURCHASE PREFERRED STOCK 
  

			
	No. PSW-    	  	January [    ], 2010

 THIS CERTIFIES THAT, for value received,
[                    ] (the “Holder”), is entitled to subscribe for and purchase at the Warrant Price (as defined
below) from AUSPEX PHARMACEUTICALS, INC., a Delaware corporation (the “Company”), up to such number and series of fully paid and nonassessable shares of Preferred Stock of
the Company (or such other number, class and kind of shares as may be issuable hereunder pursuant to Section 4 below) (the “Shares”) as set forth herein, during the Exercise Period (as defined below). 

This Warrant is issued pursuant to the Note and Warrant Purchase Agreement of the date hereof among the Company and the Purchasers listed on
the Schedule of Purchasers attached thereto (the “Purchase Agreement”). Pursuant to the Agreement, the Company issued to Holder one or more Senior Secured Convertible Promissory Notes (as defined in the Purchase Agreement)
(each, a “Note” and together, the “Notes”). Capitalized terms used and not otherwise defined herein shall have the meanings given them in the Purchase Agreement or the Notes, as applicable. 

1. EXERCISE OF WARRANT. The terms and conditions upon which this Warrant may
be exercised, and the Shares covered hereby may be purchased, are as follows: 
 (a) Term. Subject to the terms and conditions
hereof, this Warrant may be exercised at any time, or from time to time, in whole or in part, on or after the earlier of (i) the automatic conversion of the Notes at the Qualified Financing as provided for in Section 5.1 of the Notes,
(ii) immediately prior to the closing of a Liquidation Transaction (as defined in the Company’s Certificate of Incorporation, as such may be amended from time to time (the “Charter”)) or (iii)

 
the Maturity Date; provided, however, that in no event may this Warrant be exercised after 5:00 p.m. Pacific Time, on the date five years following the Effective Date (the “Exercise
Period”). 
 (b) Series of Preferred Stock. If a Qualified Financing occurs on or prior to the first to occur of
(A) the closing of a Liquidation Transaction and (B) the Maturity Date, this Warrant shall be exercisable for shares of the Preferred Stock sold in such Qualified Financing. If no Qualified Financing occurs prior to the first to occur of
(A) the closing of a Liquidation Transaction and (B) the Maturity Date, then the Holder shall, prior to exercising this Warrant, deliver written notice to the Company in order to elect either that this Warrant shall be exercisable for
shares of (x) the Company’s Series B Preferred Stock (the “Series B Preferred”) or (y) if, following the date hereof and prior to the first to occur of a Liquidation Transaction or the Maturity Date the Company
closes one or more Nonqualified Financings, shares of the Preferred Stock sold in any such Nonqualified Financing. 
 (c) Number of
Shares. The number of Shares for up to which this Warrant may be exercisable shall be determined by dividing the Warrant Coverage Amount (as defined below) by the Warrant Price (as defined below). 

(i) As used herein, the “Warrant Coverage Amount” shall mean the principal amount of Holder’s Note(s)
multiplied by 0.20. 
 (ii) As used herein, “Warrant Price” shall mean (a) the per share price of the
Preferred Stock into which the Notes are converted upon the conversion of the Notes at the Qualified Financing as provided for in Section 5.1 of the Notes, (b) $0.38 (as adjusted stock dividends, combinations, splits and other
recapitalizations after the date hereof) if the Warrant becomes exercisable for shares of Series B Preferred, or (c) if the Warrant becomes exercisable for shares of Preferred Stock sold in a Nonqualified Financing, the price per share of the
Preferred Stock sold in such Nonqualified Financing. 
 2. METHOD OF EXERCISE. 

(a) The rights represented by this Warrant may be exercised in whole or in part at any time during the Exercise Period, by delivery of
the following to the Company at its address set forth in the Purchase Agreement (or at such other address as it may designate by notice in writing to the Holder): 

(i) An executed Notice of Exercise in the form attached hereto as Exhibit A; 

(ii) Payment of the Warrant Price either (a) in cash or by check or (b) by cancellation of indebtedness or (c) by any
combination thereof; and 
 (iii) This Warrant. 

Upon the exercise of the rights represented by this Warrant, a certificate or certificates for the Shares so purchased, registered in the name
of the Holder or persons affiliated with the Holder, if the Holder so designates, shall be issued and delivered to the Holder promptly after the rights represented by this Warrant shall have been so exercised. 

  
 2. 

 The person in whose name any certificate or certificates for Shares are to be issued upon
exercise of this Warrant shall be deemed to have become the holder of record of such Shares on the date on which this Warrant was surrendered and payment of the Warrant Price was made, irrespective of the date of delivery of such certificate or
certificates, except that, if the date of such surrender and payment is a date when the stock transfer books of the Company are closed, such person shall be deemed to have become the holder of such Shares at the close of business on the next
succeeding date on which the stock transfer books are open. 
 (b) Net Exercise. Notwithstanding any provisions herein to the
contrary, if the Fair Market Value (as defined below) of one Share is greater than the Warrant Price (at the date of calculation as set forth below), in lieu of exercising this Warrant by payment of cash, the Holder may elect to receive Shares equal
to the value (as determined below) of this Warrant (or the portion thereof being canceled) by surrender of this Warrant at the principal office of the Company together with the properly endorsed Notice of Exercise, in which event the Company shall
issue to the Holder a number of Shares computed using the following formula: 
  

							
		 	X =	 	Y (A-B)	 	
		 		 	      A	 	

  

					
	Where:        	 	X =    	 	the number of Shares to be issued to the Holder
			
		 	Y =    	 	the number of Shares purchasable under the Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being canceled (at the date of such calculation)
			
		 	A =    	 	the fair market value of one Share (at the date of such calculation)
			
		 	B =    	 	the Warrant Price (as adjusted to the date of such calculation)

 For purposes of this Warrant, the fair market value of one Share (the “Fair Market
Value”) shall mean, with respect to each such Share, 
 (A) if the exercise is in connection with an initial
public offering of the Company’s Common Stock, and if the Company’s registration statement relating to such public offering has been declared effective by the Securities and Exchange Commission, then the Fair Market Value shall be the
product of (x) the initial “Price to Public” per share specified in the final prospectus with respect to the offering and (y) as applicable, the number of shares of Common Stock into which each such Share is convertible at the
date of calculation; 
 (B) if this Warrant is exercised after, and not in connection with, the initial public offering of the
Company’s Common Stock, and if the Company’s Common Stock is traded on a securities exchange or actively traded over-the-counter: 

(1) if the Company’s Common Stock is traded on a securities exchange, the Fair Market Value shall be deemed to be the
product of (x) the average of the closing prices over the 20 day period ending three days before the date of calculation and (y) as 

  
 3. 

 
applicable, the number of shares of Common Stock into which each such Share is convertible on such date; or 

(2) if the Company’s Common Stock is actively traded over-the-counter, the Fair Market Value shall be deemed to be the
product of (x) the average of the closing bid or sales price (whichever is applicable) over the 20 day period ending three days before the date of calculation and (y) as applicable, the number of shares of Common Stock into which each such
Share is convertible on such date; or 
 (C) if neither (A) nor (B) is applicable, the Fair Market Value of such share shall be
determined by the Company’s Board of Directors in good faith. 
 3. COVENANTS OF THE
COMPANY. 
 (a) Covenants as to Shares. The Company covenants and agrees that all Shares that may be issued upon
the exercise of the rights represented by this Warrant will, upon issuance, be validly issued and outstanding, fully paid and nonassessable, and free from all taxes, liens and charges with respect to the issuance thereof (other than taxes, liens or
charges created by or imposed upon the Holder through no action of the Company). The Company further covenants and agrees that the Company will at all times during the Exercise Period have authorized and reserved a sufficient number of shares to
provide for the exercise of the rights represented by this Warrant. If at any time during the Exercise Period the number of authorized but unissued shares shall not be sufficient to permit exercise of this Warrant, the Company will take such
corporate action as may, in the opinion of its counsel, be necessary to increase its authorized but unissued shares to such number of shares as shall be sufficient for such purposes.  

(b) No Impairment. Except and to the extent as waived or consented to by the Majority Purchasers in accordance with
Section 11 below, the Company will not, by amendment of its Charter or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed hereunder by the Company, but will at all times in good faith assist in the carrying out of all the provisions of this Warrant and in the taking of all such action as may be
necessary or appropriate in order to protect the exercise rights of the Holder against impairment. 
 (c) Notices of Record
Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose of determining the holders thereof who are entitled to receive any dividend or other distribution, the Company shall mail to
the Holder, at least 20 days prior to the date specified herein, a notice specifying the date on which any such record is to be taken for the purpose of such dividend or distribution. 

4. ADJUSTMENT OF WARRANT PRICE. In the event of changes in the outstanding Preferred Stock
of the Company by reason of stock dividends, split-ups, recapitalizations, reclassifications, conversions, combinations or exchanges of shares, separations, reorganizations, liquidations, or the like, the number and class of shares available under
the Warrant in the aggregate and the Warrant Price shall be correspondingly adjusted to give the Holder of the Warrant, on exercise for the same aggregate Warrant Price, the total number, class, and kind of shares as the Holder

  
 4. 

 
would have owned had the Warrant been exercised prior to the event and had the Holder continued to hold such shares until after the event requiring adjustment. 

5. ADJUSTMENT CERTIFICATE. When any adjustment is required to be made in the Shares or the Warrant Price pursuant to
Section 4 or otherwise, the Company shall promptly mail to the Holder a certificate setting forth (i) a brief statement of the facts requiring such adjustment, (ii) the Warrant Price after such adjustment and (iii) the kind and
amount of stock or other securities or property into which this Warrant shall be exercisable after such adjustment. In addition, at such time after the date hereof as the Company determines the series of Preferred Stock and number of Shares for
which this Warrant shall be exercisable and the Warrant Price, it shall deliver to the Holder a supplement setting forth such series, number of Shares and Warrant Price. 

6. FRACTIONAL SHARES. No fractional shares shall be issued upon the exercise of this Warrant as a consequence of any
adjustment pursuant hereto. All Shares (including fractions) issuable upon exercise of this Warrant may be aggregated for purposes of determining whether the exercise would result in the issuance of any fractional share. If, after aggregation, the
exercise would result in the issuance of a fractional share, the Company shall, in lieu of issuance of any fractional share, pay the Holder otherwise entitled to such fraction a sum in cash equal to the product resulting from multiplying the then
current Fair Market Value of a Share by such fraction. 
 7. EARLY TERMINATION. In the event of the closing of a
Liquidation Transaction at any time during the Exercise Period, the Company shall provide to the Holder 20 days advance written notice of such Liquidation Transaction, and this Warrant shall be deemed exercised pursuant to Section 2(b) above
immediately prior to the closing of such Liquidation Transaction. Holder agrees to make any election necessary pursuant to Section 1(b) above in order to enable to the Company to enforce the provisions of this Section 7. 

8. NO STOCKHOLDER RIGHTS. This Warrant in and of itself shall not entitle the Holder to any voting rights
or other rights as a stockholder of the Company. 
 9. LOST, STOLEN, MUTILATED OR
DESTROYED WARRANT. If this Warrant is lost, stolen, mutilated or destroyed, the Company shall, on such terms as to indemnity or otherwise as it may reasonably impose (which shall, in the case of a mutilated Warrant,
include the surrender thereof), issue a new Warrant of like denomination and tenor as the Warrant so lost, stolen, mutilated or destroyed. Any such new Warrant shall constitute an original contractual obligation of the Company, whether or not the
allegedly lost, stolen, mutilated or destroyed Warrant shall be at any time enforceable by anyone. 
 10. GOVERNING
LAW. This Warrant and all rights, obligations and liabilities hereunder shall be governed by the laws of the State of California. 

11. AMENDMENT; WAIVER. Any term of this Warrant may be amended or waived with the written consent of the Company and the
Majority Purchasers. 

  
 5. 

 12. COUNTERPARTS. This Warrant may be executed in one or more counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and the same instrument. 

  
 6. 

 IN WITNESS WHEREOF, the
Company has caused this WARRANT to be executed by its duly authorized officer as of the date first written above. 
  

			
	AUSPEX PHARMACEUTICALS, INC.
		
	By:	 	  

	Name:	 	  

	Title:	 	  

  

			
	Acknowledged and Accepted:
	
	 [HOLDER]

		
	By:	 	  

	Name:	 	
	Title:	 	

  
 [SIGNATURE
PAGE TO WARRANT] 

 EXHIBIT A 

NOTICE OF EXERCISE 
  

	TO:	AUSPEX PHARMACEUTICALS, INC. 

 (1)  ̈ The undersigned hereby elects to purchase                  Shares of AUSPEX PHARMACEUTICALS,
INC. (the “Company”) pursuant to the terms of the attached Warrant, and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any. 

 ̈ The undersigned hereby elects to purchase
                 Shares of AUSPEX PHARMACEUTICALS, INC. (the “Company”) pursuant to the terms
of the net exercise provisions set forth in Section 2(b) of the attached Warrant, and shall tender payment of all applicable transfer taxes, if any. 

(2) Please issue a certificate or certificates representing said shares of Preferred Stock in the name of the undersigned or in such other
name as is specified below: 
  

					
		 	  
	 	
		 	(Name)	 	
		 	  
	 	
		 	  
	 	
		 	(Address)	 	

 (3) The undersigned represents that (i) the aforesaid Shares are being acquired for the account of the
undersigned for investment and not with a view to, or for resale in connection with, the distribution thereof and that the undersigned has no present intention of distributing or reselling such shares; (ii) the undersigned is aware of the
Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision regarding its investment in the Company; (iii) the undersigned is experienced in
making investments of this type and has such knowledge and background in financial and business matters that the undersigned is capable of evaluating the merits and risks of this investment and protecting the undersigned’s own interests;
(iv) the undersigned understands that the Shares issuable upon exercise of this Warrant have not been registered under the Securities Act of 1933, as amended (the “Act”), by reason of a specific exemption from the
registration provisions of the Act, which exemption depends upon, among other things, the bona fide nature of the investment intent as expressed herein, and, because such securities have not been registered under the Act, they must be held
indefinitely unless subsequently registered under the Act or an exemption from such registration is available; (v) the undersigned is aware that the aforesaid Shares may not be sold pursuant to Rule 144 adopted under the Act unless certain
conditions are met and until the undersigned has held the shares for the number of years prescribed by Rule 144, that among the conditions for use of the Rule is the availability of current information to the public about the Company and the Company
has not made such information available and has no present plans to do so; and (vi) the undersigned agrees not to make any disposition of all or any part of the aforesaid Shares unless and until there is then in effect a registration statement
under the Act covering such proposed disposition and such disposition is made in accordance with said registration statement, or the undersigned has provided the Company with an opinion of counsel satisfactory to the Company, stating that such
registration is not required. 
  

							
	  
	 		 		 	  

	(Date)	 		 		 	(Signature)
				
		 		 		 	  

		 		 		 	(Print name)

 EXHIBIT B 

FORM OF ASSIGNMENT 
  

					
		 	(To assign the foregoing Warrant, execute this form and supply required information. Do not use this form to purchase shares.)	 	

 FOR VALUE RECEIVED, the foregoing Warrant and all rights
evidenced thereby are hereby assigned to: 
  

					
	Name:	 	  

		 	(Please Print)
		
	Address:	 	  

		 	(Please Print)
			
	Dated:	 	                 , 200  	 	
			
	Holder’s Signature:	 	  
	 	
			
	Holder’s Address:	 	  
	 	

 NOTE: The signature to this Form of Assignment must correspond with the name as it appears on the face of the Warrant,
without alteration or enlargement or any change whatever. Officers of corporations and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant.EX-10.16

 Exhibit 10.16 

THIS WARRANT AND THE UNDERLYING SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT
BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR UNLESS THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT
REQUIRED.  
 THE SALE, PLEDGE, HYPOTHECATION OR TRANSFER OF THIS WARRANT AND THE UNDERLYING SECURITIES IS SUBJECT TO THE TERMS AND CONDITIONS
OF A CERTAIN NOTE AND WARRANT PURCHASE AGREEMENT BY AND BETWEEN THE HOLDER AND THE COMPANY. COPIES OF SUCH AGREEMENT MAY BE OBTAINED UPON WRITTEN REQUEST TO THE SECRETARY OF THE COMPANY. 

AUSPEX PHARMACEUTICALS, INC. 

WARRANT TO PURCHASE PREFERRED STOCK 
  

			
	No. PSW-[    ]	  	July [    ], 2012

 THIS CERTIFIES THAT, for value received,
[                    ] (the “Holder”), is entitled to subscribe for and purchase at the Warrant Price (as defined
below) from AUSPEX PHARMACEUTICALS, INC., a Delaware corporation (the “Company”), up to such number and series of fully paid and nonassessable shares of Preferred Stock of
the Company (or such other number, class and kind of shares as may be issuable hereunder pursuant to Section 4 below) (the “Shares”) as set forth herein, during the Exercise Period (as defined below). 

This Warrant is issued pursuant to the Note and Warrant Purchase Agreement of July [    ], 2012 among the Company and the
Purchasers listed on the Schedule of Purchasers attached thereto (the “Purchase Agreement”). Pursuant to the Agreement, the Company issued to Holder one or more Senior Secured Convertible Promissory Notes (as defined in the
Purchase Agreement and, for clarity, including any Notes issued upon the Additional Closing) (each, a “Note” and together, the “Notes”). Capitalized terms used and not otherwise defined herein shall
have the meanings given them in the Purchase Agreement or the Notes, as applicable. 
 1. EXERCISE OF
WARRANT. The terms and conditions upon which this Warrant may be exercised, and the Shares covered hereby may be purchased, are as follows: 

(a) Term. Subject to the terms and conditions hereof, this Warrant may be exercised at any time, or from time to time, in whole
or in part, on or after the earlier of (i) the automatic conversion of the Notes at the Qualified Financing as provided for in Section 5.1 of the Notes, (ii) immediately prior to the closing of a Liquidation Transaction (as defined in
the Company’s Certificate of Incorporation, as such may be amended from time to time (the “Charter”)), or (iii) 

 
the Maturity Date; provided, however, that in no event may this Warrant be exercised after 5:00 p.m. Pacific Time, on the date five years following the Effective Date (the “Exercise
Period”). 
 (b) Series of Preferred Stock. If a Qualified Financing occurs on or prior to the first to occur of
(A) the closing of a Liquidation Transaction and (B) the Maturity Date, this Warrant shall be exercisable for shares of the Preferred Stock sold in such Qualified Financing. If no Qualified Financing occurs prior to the first to occur of
(A) the closing of a Liquidation Transaction and (B) the Maturity Date, then the Holder shall, prior to exercising this Warrant, deliver written notice to the Company in order to elect either that this Warrant shall be exercisable for
shares of (x) the Company’s Series C Preferred Stock (the “Series C Preferred”) or (y) if, following the date hereof and prior to a Liquidation Transaction the Company closes one or more
Nonqualified Financings, shares of the Preferred Stock sold in any such Nonqualified Financing.  
 (c) Number of Shares. The
number of Shares for up to which this Warrant may be exercisable shall be determined by dividing the Warrant Coverage Amount (as defined below) by the Warrant Price (as defined below).  

(i) As used herein, the “Warrant Coverage Amount” shall mean the principal amount of Holder’s Note(s)
multiplied by 0.20. 
 (ii) As used herein, “Warrant Price” shall mean (a) the per share price of the
Preferred Stock into which the Notes are converted upon the conversion of the Notes at the Qualified Financing as provided for in Section 5.1 of the Notes, (b) $0.0862 (as adjusted stock dividends, combinations, splits and other
recapitalizations after the date hereof) if the Warrant becomes exercisable for shares of Series C Preferred, or (c) if the Warrant becomes exercisable for shares of Preferred Stock sold in a Nonqualified Financing, the price per share of the
Preferred Stock sold in such Nonqualified Financing. 
 2. METHOD OF EXERCISE. 

(a) The rights represented by this Warrant may be exercised in whole or in part at any time during the Exercise Period, by delivery of
the following to the Company at its address set forth in the Purchase Agreement (or at such other address as it may designate by notice in writing to the Holder): 

(i) An executed Notice of Exercise in the form attached hereto as EXHIBIT A; 

(ii) Payment of the Warrant Price either (a) in cash or by check or (b) by cancellation of indebtedness or (c) by any
combination thereof; and 
 (iii) This Warrant. 

Upon the exercise of the rights represented by this Warrant, a certificate or certificates for the Shares so purchased, registered in the name
of the Holder or persons affiliated with the 

  
 2. 

 
Holder, if the Holder so designates, shall be issued and delivered to the Holder promptly after the rights represented by this Warrant shall have been so exercised. 

The person in whose name any certificate or certificates for Shares are to be issued upon exercise of this Warrant shall be deemed to have
become the holder of record of such Shares on the date on which this Warrant was surrendered and payment of the Warrant Price was made, irrespective of the date of delivery of such certificate or certificates, except that, if the date of such
surrender and payment is a date when the stock transfer books of the Company are closed, such person shall be deemed to have become the holder of such Shares at the close of business on the next succeeding date on which the stock transfer books are
open. 
 (b) Net Exercise. Notwithstanding any provisions herein to the contrary, if the Fair Market Value (as defined below)
of one Share is greater than the Warrant Price (at the date of calculation as set forth below), in lieu of exercising this Warrant by payment of cash, the Holder may elect to receive Shares equal to the value (as determined below) of this Warrant
(or the portion thereof being canceled) by surrender of this Warrant at the principal office of the Company together with the properly endorsed Notice of Exercise, in which event the Company shall issue to the Holder a number of Shares computed
using the following formula: 
  

							
		 	X =	 	Y (A-B)	 	
		 		 	      A	 	

  

					
	Where:        	 	X =    	 	the number of Shares to be issued to the Holder
			
		 	Y =	 	the number of Shares purchasable under the Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being canceled (at the date of such calculation)
			
		 	A =	 	the fair market value of one Share (at the date of such calculation)
			
		 	B =	 	the Warrant Price (as adjusted to the date of such calculation)

 For purposes of this Warrant, the fair market value of one Share (the “Fair Market
Value”) shall mean, with respect to each such Share, 
 (A) if the exercise is in connection with an initial
public offering of the Company’s Common Stock, and if the Company’s registration statement relating to such public offering has been declared effective by the Securities and Exchange Commission, then the Fair Market Value shall be the
product of (x) the initial “Price to Public” per share specified in the final prospectus with respect to the offering and (y) as applicable, the number of shares of Common Stock into which each such Share is convertible at the
date of calculation; 
 (B) if this Warrant is exercised after, and not in connection with, the initial public offering of the
Company’s Common Stock, and if the Company’s Common Stock is traded on a securities exchange or actively traded over-the-counter: 

  
 3. 

 (1) if the Company’s Common Stock is traded on a securities exchange, the
Fair Market Value shall be deemed to be the product of (x) the average of the closing prices over the 20 day period ending three days before the date of calculation and (y) as applicable, the number of shares of Common Stock into which
each such Share is convertible on such date; or 
 (2) if the Company’s Common Stock is actively traded
over-the-counter, the Fair Market Value shall be deemed to be the product of (x) the average of the closing bid or sales price (whichever is applicable) over the 20 day period ending three days before the date of calculation and (y) as
applicable, the number of shares of Common Stock into which each such Share is convertible on such date; or 
 (C) if neither (A) nor
(B) is applicable, the Fair Market Value of such share shall be determined by the Company’s Board of Directors in good faith. 
 3.
COVENANTS OF THE COMPANY. 
 (a) Covenants as to Shares. The Company
covenants and agrees that all Shares that may be issued upon the exercise of the rights represented by this Warrant will, upon issuance, be validly issued and outstanding, fully paid and nonassessable, and free from all taxes, liens and charges with
respect to the issuance thereof (other than taxes, liens or charges created by or imposed upon the Holder through no action of the Company). The Company further covenants and agrees that the Company will at all times during the Exercise Period have
authorized and reserved a sufficient number of shares to provide for the exercise of the rights represented by this Warrant. If at any time during the Exercise Period the number of authorized but unissued shares shall not be sufficient to permit
exercise of this Warrant, the Company will take such corporate action as may, in the opinion of its counsel, be necessary to increase its authorized but unissued shares to such number of shares as shall be sufficient for such purposes.  

(b) No Impairment. Except and to the extent as waived or consented to by the Majority Purchasers in accordance with
Section 11 below, the Company will not, by amendment of its Charter or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed hereunder by the Company, but will at all times in good faith assist in the carrying out of all the provisions of this Warrant and in the taking of all such action as may be
necessary or appropriate in order to protect the exercise rights of the Holder against impairment. 
 (c) Notices of Record
Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose of determining the holders thereof who are entitled to receive any dividend or other distribution, the Company shall mail to
the Holder, at least 20 days prior to the date specified herein, a notice specifying the date on which any such record is to be taken for the purpose of such dividend or distribution. 

4. ADJUSTMENT OF WARRANT PRICE. In the event of changes in the outstanding Preferred Stock
of the Company by reason of stock dividends, split-ups, recapitalizations, reclassifications, 

  
 4. 

 
conversions, combinations or exchanges of shares, separations, reorganizations, liquidations, or the like, the number and class of shares available under the Warrant in the aggregate and the
Warrant Price shall be correspondingly adjusted to give the Holder of the Warrant, on exercise for the same aggregate Warrant Price, the total number, class, and kind of shares as the Holder would have owned had the Warrant been exercised prior to
the event and had the Holder continued to hold such shares until after the event requiring adjustment. 
 5. ADJUSTMENT
CERTIFICATE. When any adjustment is required to be made in the Shares or the Warrant Price pursuant to Section 4 or otherwise, the Company shall promptly mail to the Holder a certificate setting forth (i) a brief
statement of the facts requiring such adjustment, (ii) the Warrant Price after such adjustment and (iii) the kind and amount of stock or other securities or property into which this Warrant shall be exercisable after such adjustment. In
addition, at such time after the date hereof as the Company determines the series of Preferred Stock and number of Shares for which this Warrant shall be exercisable and the Warrant Price, it shall deliver to the Holder a supplement setting forth
such series, number of Shares and Warrant Price. 
 6. FRACTIONAL SHARES. No fractional shares shall be issued upon the
exercise of this Warrant as a consequence of any adjustment pursuant hereto. All Shares (including fractions) issuable upon exercise of this Warrant may be aggregated for purposes of determining whether the exercise would result in the issuance of
any fractional share. If, after aggregation, the exercise would result in the issuance of a fractional share, the Company shall, in lieu of issuance of any fractional share, pay the Holder otherwise entitled to such fraction a sum in cash equal to
the product resulting from multiplying the then current Fair Market Value of a Share by such fraction. 
 7. EARLY
TERMINATION. In the event of the closing of a Liquidation Transaction at any time during the Exercise Period, the Company shall provide to the Holder 20 days advance written notice of such Liquidation Transaction, and this Warrant
shall be deemed exercised pursuant to Section 2(b) above immediately prior to the closing of such Liquidation Transaction. Holder agrees to make any election necessary pursuant to Section 1(b) above in order to enable to the Company to
enforce the provisions of this Section 7. 
 8. NO STOCKHOLDER RIGHTS. This Warrant in and of
itself shall not entitle the Holder to any voting rights or other rights as a stockholder of the Company. 
 9. LOST,
STOLEN, MUTILATED OR DESTROYED WARRANT. If this Warrant is lost, stolen, mutilated or destroyed, the Company shall, on such terms as to indemnity or otherwise as it may
reasonably impose (which shall, in the case of a mutilated Warrant, include the surrender thereof), issue a new Warrant of like denomination and tenor as the Warrant so lost, stolen, mutilated or destroyed. Any such new Warrant shall constitute an
original contractual obligation of the Company, whether or not the allegedly lost, stolen, mutilated or destroyed Warrant shall be at any time enforceable by anyone. 

10. GOVERNING LAW. This Warrant and all rights, obligations and liabilities hereunder shall be governed by the laws of
the State of California. 

  
 5. 

 11. AMENDMENT; WAIVER. Any term of this Warrant may be amended or waived
with the written consent of the Company and the Requisite Purchasers. 
 12. COUNTERPARTS. This Warrant may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. 

[REMAINDER OF THIS PAGE INTENTIONALLY LEFT
BLANK] 

  
 6. 

 IN WITNESS WHEREOF, the
Company has caused this WARRANT to be executed by its duly authorized officer as of the date first written above. 
  

			
	AUSPEX PHARMACEUTICALS, INC.
		
	By:	 	  

	Name:	 	  

	Title:	 	  

  

			
	Acknowledged and Accepted:
	
	 [HOLDER]

		
	By:	 	  

	Name:	 	
	Title:	 	

 EXHIBIT A 

NOTICE OF EXERCISE 
  

	TO:	AUSPEX PHARMACEUTICALS, INC. 

 (1)  ̈ The undersigned hereby elects to purchase                  Shares of AUSPEX PHARMACEUTICALS,
INC. (the “Company”) pursuant to the terms of the attached Warrant, and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any. 

 ̈ The undersigned hereby elects to purchase
                 Shares of AUSPEX PHARMACEUTICALS, INC. (the “Company”) pursuant to the terms
of the net exercise provisions set forth in Section 2(b) of the attached Warrant, and shall tender payment of all applicable transfer taxes, if any. 

(2) Please issue a certificate or certificates representing said shares of Preferred Stock in the name of the undersigned or in such other
name as is specified below: 
  

					
		 	  
	 	
		 	(Name)	 	
		 	  
	 	
		 	  
	 	
		 	(Address)	 	

 (3) The undersigned represents that (i) the aforesaid Shares are being acquired for the account of the
undersigned for investment and not with a view to, or for resale in connection with, the distribution thereof and that the undersigned has no present intention of distributing or reselling such shares; (ii) the undersigned is aware of the
Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision regarding its investment in the Company; (iii) the undersigned is experienced in
making investments of this type and has such knowledge and background in financial and business matters that the undersigned is capable of evaluating the merits and risks of this investment and protecting the undersigned’s own interests;
(iv) the undersigned understands that the Shares issuable upon exercise of this Warrant have not been registered under the Securities Act of 1933, as amended (the “Act”), by reason of a specific exemption from the
registration provisions of the Act, which exemption depends upon, among other things, the bona fide nature of the investment intent as expressed herein, and, because such securities have not been registered under the Act, they must be held
indefinitely unless subsequently registered under the Act or an exemption from such registration is available; (v) the undersigned is aware that the aforesaid Shares may not be sold pursuant to Rule 144 adopted under the Act unless certain
conditions are met and until the undersigned has held the shares for the number of years prescribed by Rule 144, that among the conditions for use of the Rule is the availability of current information to the public about the Company and the Company
has not made such information available and has no present plans to do so; and (vi) the undersigned agrees not to make any disposition of all or any part of the aforesaid Shares unless and until there is then in effect a registration statement
under the Act covering such proposed disposition and such disposition is made in accordance with said registration statement, or the undersigned has provided the Company with an opinion of counsel satisfactory to the Company, stating that such
registration is not required. 
  

							
	  
	 		 		 	  

	(Date)	 		 		 	(Signature)
				
		 		 		 	  

		 		 		 	(Print name)

  
 8. 

 EXHIBIT B 

FORM OF ASSIGNMENT 
  

					
		 	(To assign the foregoing Warrant, execute this form and supply required information. Do not use this form to purchase shares.)	 	

 FOR VALUE RECEIVED, the foregoing Warrant and all rights
evidenced thereby are hereby assigned to: 
  

					
	Name:	 	  

		 	(Please Print)
		
	Address:	 	  

		 	(Please Print)
			
	Dated:	 	                 , 201  	 	
			
	Holder’s Signature:	 	  
	 	
			
	Holder’s Address:	 	  
	 	

 NOTE: The signature to this Form of Assignment must correspond with the name as it appears on the face of the Warrant,
without alteration or enlargement or any change whatever. Officers of corporations and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant.

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