Document:

Exhibit 10.4

 

REGISTRATION RIGHTS AGREEMENT 

 

REGISTRATION RIGHTS AGREEMENT
(the “Agreement”), dated as of June 23, 2014, between Urigen Pharmaceuticals, Inc., a Delaware corporation (the “Company”),
and Platinum-Montaur Life Sciences, LLC (“Platinum”), and the other holders signatory hereto (the “Other Holders”).

 

WHEREAS, Platinum, the Other Holders and the Company are parties to a Waiver and Exchange Agreement, dated
as of April 25, 2014 (the “Exchange Agreement”), pursuant to which, among other things, Platinum and the Other Holders
agreed to forbear from the exercise of certain remedies and exchange certain securities on the terms set forth therein;

 

WHEREAS, it is a condition
to the consummation of the transactions contemplated by the Exchange Agreement that the Company provide for the grant of registration
rights with respect to the Registrable Securities (as hereinafter defined) on the terms set forth herein.

 

NOW, THEREFORE, in consideration
of the mutual covenants and agreements set forth herein and for good and valuable consideration, the receipt and adequacy of which
are hereby acknowledged, the parties hereto agree as follows:

 

1.          Definitions.      As
used in this Agreement, and unless the context requires a different meaning, the following terms have the meanings indicated:

 

“Affiliate” shall mean any Person
who is an “affiliate” as defined in Rule 12b-2 of the General Rules and Regulations under the Exchange Act.

 

“Agreement” means this Agreement
as the same may be amended, supplemented or modified in accordance with the terms hereof.

 

“Approved Underwriter” has the meaning
set forth in Section 3(f) of this Agreement.

 

“Board of Directors” means the Board
of Directors of the Company.

 

“Business Day”
means any day other than a Saturday, Sunday or other day on which commercial banks in the State of New York are authorized or required
by law or executive order to close.

 

“Closing Price”
means, on any particular date (i) the last trading price per share of the Common Stock on such date on a national securities exchange
on which the Common Stock is then listed, or if there is no such price on such date, then the last trading price on such exchange
or quotation system on the date nearest preceding such date, or (ii) if the Common Stock is not listed then on the OTC Bulletin
Board or any registered national stock exchange, the last trading price for a share of Common Stock in the over the counter market,
as reported by the OTC Bulletin Board, the OTCQB, the OTCQX or in the National Quotation Bureau Incorporated or similar organization
or agency succeeding to its functions of reporting prices) at the close of business on such date, or (iii) if the Common Stock
is not then reported by the OTC Bulletin Board or the National Quotation Bureau Incorporated (or similar organization or agency
succeeding to its functions of reporting prices), then the average of the “Pink Sheet” quotes for the relevant conversion
period, as determined in good faith by Platinum and reasonably acceptable to the Company, or (iv) if the Common Stock is not then
publicly traded the fair market value of a share of Common Stock as determined by Platinum and reasonably acceptable to the Company.

 

    	 

    	 

    

 

“Commission” means the Securities
and Exchange Commission or any similar agency then having jurisdiction to enforce the Securities Act.

 

“Common Stock”
means the Common Stock, par value $0.001 per share, of the Company or any other capital stock of the Company into which such stock
is reclassified or reconstituted and any other common stock of the Company.

 

“Company” has the meaning set forth
in the preamble to this Agreement.

 

“Company Underwriter” has the meaning
set forth in Section 4(a) of this Agreement.

 

“Demand Registration” has the meaning
set forth in Section 3(a) of this Agreement.

 

“Designated Holder”
means each of Platinum and the Other Holders and any transferee of any of them to whom Registrable Securities have been transferred
in accordance with Section 10(f) of this Agreement, other than a transferee to whom Registrable Securities have been transferred
pursuant to a Registration Statement under the Securities Act or Rule 144 or Regulation S under the Securities Act (or any successor
rule thereto).

 

“Designated Holder Lock-Up” has
the meaning set forth in Section 6(b) of this Agreement.

 

“Exchange Act” means the Securities
Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder.

 

“FINRA” means the Financial Industry
Regulatory Authority.

 

“Holders’ Counsel” has the
meaning set forth in Section 7(a)(i) of this Agreement.

 

“Incidental Registration” has the
meaning set forth in Section 4(a) of this Agreement.

 

“Indemnified Party” has the meaning
set forth in Section 8(c) of this Agreement.

 

“Indemnifying Party” has the meaning
set forth in Section 8(c) of this Agreement.

 

“Initial Public Offering”
means the initial public offering of the shares of Common Stock of the Company pursuant to an effective Registration Statement
filed under the Securities Act or, if earlier, the registration of the Common Stock pursuant to Section 12(b) or 12(g) of the Exchange
Act.

 

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“Inspector” has the meaning set
forth in Section 7(a)(vii) of this Agreement.

 

“IPO Effectiveness Date” means the
date upon which the Company consummates the Initial Public Offering.

 

“Liability” has the meaning set
forth in Section 8(a) of this Agreement.

 

“Market Price”
means, on any date of determination, the average of the daily Closing Price of the Registrable Securities for the immediately preceding
thirty (30) days on which the national securities exchanges are open for trading.

 

“Person” means
any individual, firm, corporation, partnership, limited liability company, trust, incorporated or unincorporated association, joint
venture, joint stock company, limited liability company, government (or an agency or political subdivision thereof) or other entity
of any kind, and shall include any successor (by merger or otherwise) of such entity.

 

“Platinum Lock-Up” has the meaning
set forth in Section 6(b) of this Agreement.

 

“Records” has the meaning set forth
in Section 7(a)(vii) of this Agreement.

 

“Registrable Securities”
means each of the following: (a) any and all shares of Common Stock now or hereafter owned by the Designated Holders or issued
or issuable upon conversion of any convertible securities or exercise of any warrants or options held by Designated Holders and
(b) any shares of Common Stock issued or issuable to Designated Holders with respect to the Registrable Securities by way of stock
dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or other reorganization
or otherwise and any shares of Common Stock or voting common stock issuable upon conversion, exercise or exchange thereof.

 

“Registration Expenses” has the
meaning set forth in Section 7(d) of this Agreement.

 

“Registration Statement” means a
Registration Statement filed pursuant to the Securities Act.

 

“S-3 Registration” has the meaning
set forth in Section 5(a) of this Agreement.

 

“Securities Act” means the Securities
Act of 1933, as amended, and the rules and regulations of the Commission promulgated thereunder.

 

“Valid Business Reason” has the
meaning set forth in Section 3(a) of this Agreement.

 

2.          General;
Securities Subject to this Agreement.

 

(a)         Grant
of Rights.         The Company hereby grants registration rights to the Designated
Holders upon the terms and conditions set forth in this Agreement.

 

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(b)          Registrable
Securities.         For the purposes of this Agreement, Registrable Securities
held by a Designated Holder will cease to be Registrable Securities, when (i) a Registration Statement covering such Registrable
Securities has been declared effective under the Securities Act by the Commission and such Registrable Securities have been disposed
of pursuant to such effective Registration Statement, (ii) (x) the entire amount of the Registrable Securities held by such Designated
Holder may be sold in a single sale, in the opinion of counsel to the Company and such Designated Holder, each in their reasonable
judgment, without any limitation as to volume or manner of sale pursuant to Rule 144 (or any successor provision then in effect)
under the Securities Act and (y) such Designated Holder owns less than one percent (1%) of the outstanding shares of Common Stock
on a fully diluted basis or (iii) the Registrable Securities are proposed to be sold or distributed by a Person not entitled to
the registration rights granted by this Agreement.

 

(c)           Holders
of Registrable Securities.      A Person is deemed to be a holder of Registrable Securities
whenever such Person owns of record Registrable Securities, or holds an option to purchase, or a security convertible into or
exercisable or exchangeable for, Registrable Securities whether or not such acquisition or conversion has actually been effected.
If the Company receives conflicting instructions, notices or elections from two or more Persons with respect to the same Registrable
Securities, the Company may act upon the basis of the instructions, notice or election received from the registered owner of such
Registrable Securities. Registrable Securities issuable upon exercise of an option or upon conversion of another security shall
be deemed outstanding for the purposes of this Agreement.

 

3.           Demand
Registration.

 

(a)          Request
for Demand Registration.      At any time after the IPO Effectiveness Date, Platinum may make
a written request to the Company to register, and the Company shall register, under the Securities Act (other than pursuant to
a Registration Statement on Form S-4 or S-8 or any successor thereto) (a “Demand Registration”), the number of Registrable
Securities stated in such request; provided, however, that the Company shall not be obligated to effect (x) more
than five such Demand Registrations, (y) a Demand Registration if Platinum, together with the other Designated Holders which have
requested to register securities in such registration pursuant to Section 3(b), propose to sell their Registrable Securities at
an aggregate price (calculated based upon the Market Price of the Registrable Securities on the date of filing of the Registration
Statement with respect to such Registrable Securities) to the public of less than $200,000 and (z) any such Demand Registration
commencing prior to 90 days after the IPO Effectiveness Date. If the Board of Directors, in its good faith judgment, determines
that any registration of Registrable Securities should not be made or continued because it would materially interfere with any
material financing, acquisition, corporate reorganization or merger or other material transaction involving the Company (a “Valid
Business Reason”), the Company may (x) postpone filing a Registration Statement relating to a Demand Registration until
such Valid Business Reason no longer exists, but in no event for more than (i) forty-five (45) days, and (y) in case a Registration
Statement has been filed relating to a Demand Registration, the Company, upon the approval of a majority of the Board of Directors,
may cause such Registration Statement to be withdrawn and its effectiveness terminated or may postpone amending or supplementing
such Registration Statement (in which case, if the Valid Business Reason no longer exists or if more forty-five (45) days have
passed since such withdrawal or postponement, Platinum may request a new Demand Registration). The Company shall give written
notice of its determination to postpone or withdraw a Registration Statement and of the fact that the Valid Business Reason for
such postponement or withdrawal no longer exists, in each case, promptly after the occurrence thereof. Notwithstanding anything
to the contrary contained herein, the Company may not postpone or withdraw a filing under this Section 3(a) more than once in
any twelve (12) month period. Each request for a Demand Registration shall state the amount of the Registrable Securities proposed
to be sold and the intended method of disposition thereof (including whether such offering is to be made on a continuous basis
pursuant to Rule 415).

 

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(b)          Incidental
or “Piggy-Back” Rights with Respect to a Demand Registration. Each of the other Designated Holders (other
than Platinum) may offer its or his Registrable Securities under any Demand Registration requested by Platinum pursuant to
this Section 3. Within five (5) days after the receipt of a request for a Demand Registration from Platinum, the Company
shall (i) give written notice thereof to all of the Designated Holders and (ii) subject to Section 3(e), include in such
registration all of the Registrable Securities held by such Designated Holders from whom the Company has received a written
request for inclusion therein within ten (10) days of the receipt by such Designated Holders of such written notice referred
to in clause (i) above. Each such request by such Designated Holder shall specify the number of Registrable Securities
proposed to be registered. The failure of any Designated Holder to respond within such 10-day period referred to in clause
(ii) above shall be deemed to be a waiver of such Designated Holder’s rights under this Section 3(b) with respect to
such Demand Registration. Any Designated Holder may waive its rights under this Section 3(b) prior to the expiration of such
10-day period by giving written notice to the Company, with a copy to Platinum. If a Designated Holder sends the Company a
written request for inclusion of part or all of such Designated Holder’s Registrable Securities in a registration, such
Designated Holder shall not be entitled to withdraw or revoke such request without the prior written consent of the Company
in its sole discretion unless, (i) as a result of facts or circumstances arising after the date on which such request was
made relating to the Company or to market conditions, such Designated Holder reasonably determines that participation in such
registration would have a material adverse effect on such Designated Holder or (ii) if the Closing Price declines by more
than forty percent (40%) from the date the Initiating Holders requested such Demand Registration.

 

(c)          Effective
Demand Registration.        The Company shall use its commercially reasonable efforts
to cause any such Demand Registration to become and remain effective not later than ninety (90) days after it receives a request
under Section 3(a) hereof. A registration shall not constitute a Demand Registration until it has become effective and remains
continuously effective for the lesser of (i) the period during which all Registrable Securities registered in the Demand Registration
are sold or (ii) 180 days (except in the case of a registration filed pursuant to Rule 415 of the Securities Act or any successor
rule or regulation); provided, however, that a registration shall not constitute a Demand Registration if (x) after
such Demand Registration has become effective, such registration or the related offer, sale or distribution of Registrable Securities
thereunder is interfered with by any stop order, injunction or other order or requirement of the Commission or other governmental
agency or court for any reason not attributable to Platinum and such interference is not thereafter eliminated or (y) the conditions
specified in the underwriting agreement, if any, entered into in connection with such Demand Registration are not satisfied or
waived, other than by reason of a failure by Platinum.

 

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(d)          Expenses.        The
Company shall pay all Registration Expenses in connection with a Demand Registration, whether or not such Demand Registration
becomes effective.

 

(e)          Underwriting
Procedures.      If the Company or Platinum so elect, the Company shall use its commercially
reasonable efforts to cause such Demand Registration to be in the form of a firm commitment underwritten offering and the managing
underwriter or underwriters selected for such offering shall be the Approved Underwriter selected in accordance with Section 3(f).
In connection with any Demand Registration under this Section 3 involving an underwritten offering, none of the Registrable Securities
held by any Designated Holder making a request for inclusion of such Registrable Securities pursuant to Section 3(b) hereof shall
be included in such underwritten offering unless such Designated Holder accepts the terms of the offering as agreed upon by the
Company, Platinum and the Approved Underwriter, and then only in such quantity as set forth below. If the Approved Underwriter
advises the Company that the aggregate amount of such Registrable Securities requested to be included in such offering is sufficiently
large to have a material adverse effect on the success of such offering, then the Company shall include in such registration,
to the extent of the amount that the Approved Underwriter believes may be sold without causing such material adverse effect, first,
such number of Registrable Securities of Platinum and any other Designated Holder participating in the offering pursuant to the
terms of Section 3(b), which Registrable Securities shall be allocated pro rata among Platinum and such other Designated Holders,
based on the number of Registrable Securities held by Platinum and each such Designated Holder, and second, securities
offered by the Company for its own account or offered by other stockholders of the Company (other than the Designated Holders).

 

(f)          Selection
of Underwriters.      If any Demand Registration or S-3 Registration, as the case may be, of
Registrable Securities is in the form of an underwritten offering, the Company shall select and obtain an investment banking firm
of national reputation to act as the managing underwriter of the offering (the “Approved Underwriter”); provided,
however, that the Approved Underwriter shall, in any case, also be approved by Platinum, such approval not to be unreasonably
withheld.

 

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4.           Incidental
or “Piggy-Back” Registration.

 

(a)          Request
for Incidental Registration.   At any time after the IPO Effectiveness Date, if the Company proposes to file
a Registration Statement under the Securities Act with respect to an offering by the Company for its own account (other than a
Registration Statement on Form S-4 or S-8 or any successor thereto) or for the account of any stockholder of the Company other
than the Designated Holders, then the Company shall give written notice of such proposed filing to each Designated Holder at least
twenty (20) days before the anticipated filing date, and such notice shall describe the proposed registration and distribution
and offer the Designated Holders the opportunity to register the number of Registrable Securities as the Designated Holders may
request (an “Incidental Registration”). The Company shall use its commercially reasonable efforts (within twenty (20)
days of the notice provided for in the preceding sentence) to cause the managing underwriter or underwriters in the case of a
proposed underwritten offering (the “Company Underwriter”) to permit each of the Designated Holders who have requested
in writing to participate in the Incidental Registration to include its or his Registrable Securities in such offering on the
same terms and conditions as the securities of the Company or the account of such other stockholder, as the case may be, included
therein. In connection with any Incidental Registration under this Section 4(a) involving an underwritten offering, the Company
shall not be required to include any Registrable Securities in such underwritten offering unless the Designated Holders thereof
accept the terms of the underwritten offering as agreed upon between the Company, such other stockholders, if any, and the Company
Underwriter, and then only in such quantity as set forth below. If the Company Underwriter determines that the registration of
all or part of the securities that have been requested to be included would materially adversely affect the success of such offering,
then the Company shall be required to include in such Incidental Registration, to the extent of the amount that the Company Underwriter
believes may be sold without causing such material adverse effect, first, all of the securities to be offered for the account
of the Company and second, any other securities of the Company requested by stockholders to be included in such offering
(including the Registrable Securities), which such securities shall be allocated pro rata among the stockholders participating
in the offering based on the number of the Company’s securities held by each such stockholder.

 

(b)         Expenses.        The
Company shall bear all Registration Expenses in connection with any Incidental Registration pursuant to this Section 4, whether
or not such Incidental Registration becomes effective.

 

5.           Form
S-3 Registration.

 

(a)          Request
for a Form S-3 Registration. The Company will use its commercially reasonable efforts to file all required
reports under the Exchange Act in order to qualify for the use of Form S-3 under the Securities Act; provided, that this covenant
shall not require the Company to remain a reporting company under the Exchange Act if the Company shall have determined to enter
into a merger, acquisition, going private transaction or similar transaction. Upon the Company becoming eligible for use of Form
S-3 (or any successor form thereto) under the Securities Act in connection with a public offering of its securities, in the event
that the Company shall receive from Platinum a written request that the Company register, under the Securities Act on Form S-3
(or any successor form then in effect) (an “S-3 Registration”), all or a portion of the Registrable Securities owned
by Platinum, the Company shall register, under the Securities Act, the sale of such Registrable Securities for sale on Form S-3
under the Securities Act. With respect to each S-3 Registration, the Company shall, subject to Section 5(b), (i) include in such
offering the Registrable Securities requested to be so included and (ii) use its commercially reasonable efforts to cause such
registration pursuant to this Section 5(a) to become and remain effective as soon as practicable.

  

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(b)          Form
S-3 Underwriting Procedures.   If Platinum so elects, the Company shall use its commercially reasonable
efforts to cause such S-3 Registration pursuant to this Section 5 to be in the form of a firm commitment underwritten
offering and the managing underwriter or underwriters selected for such offering shall be the Approved Underwriter selected
in accordance with Section 3(e). If the Approved Underwriter believes that the registration of all or part of the Registrable
Securities which the Designated Holders have requested to be included would materially adversely affect the success of such
public offering, then the Company shall be required to include in the underwritten offering, to the extent of the amount that
the Approved Underwriter believes may be sold without causing such material adverse effect, first, such number of
Registrable Securities of Platinum and the other Designated Holders, which Registrable Securities shall be allocated pro rata
among Platinum and such other Designated Holders, based on the number of Registrable Securities held by Platinum and each
such Designated Holder, second, any other securities of the Company requested by holders (including the Designated
Holders other than Platinum) thereof to be included in such registration, which such securities shall be allocated pro rata
among such stockholders, based on the number of the Company’s securities held by each such stockholder, and third,
securities offered by the Company for its own account.

 

(c)          Limitations
on Form S-3 Registrations.        If the Board of Directors has a Valid Business Reason,
the Company may (x) postpone filing a Registration Statement relating to a S-3 Registration until such Valid Business Reason no
longer exists, but in no event for more than forty-five (45) days following the request and (y) in case a Registration Statement
has been filed relating to a S-3 Registration, the Company, upon the approval of a majority of the Board of Directors, may cause
such Registration Statement to be withdrawn and its effectiveness terminated or may postpone amending or supplementing such Registration
Statement (in which case, if the Valid Business Reason no longer exists or if more than forty-five (45) days have passed since
such withdrawal or postponement, Platinum may request the prompt amendment or supplement of such Registration Statement or a new
S-3 Registration). The Company shall give written notice of its determination to postpone or withdraw a Registration Statement
and of the fact that the Valid Business Reason for such postponement or withdrawal no longer exists, in each case, promptly after
the occurrence thereof. Notwithstanding anything to the contrary contained herein, the Company may not postpone or withdraw a
filing, under either this Section or Section 3(a), due to a Valid Business Reason more than once in any twelve (12) month period.
In addition, the Company shall not be required to effect any registration pursuant to Section 5(a), (i) within ninety (90) days
after the effective date of any other Registration Statement of the Company (other than a Registration Statement on Form S-4 or
S-8 or any successor thereto), or (ii) if Form S-3 is not available for such offering by Platinum.

 

(d)          Expenses.        The
Company shall bear all Registration Expenses in connection with any S-3 Registration pursuant to this Section 5, whether or not
such S-3 Registration becomes effective.

 

(e)          No
Demand Registration.       No registration requested by Platinum pursuant to
this Section 5 shall be deemed a Demand Registration pursuant to Section 3.

 

6.           Restrictions
on Sales.

 

(a)          The
Company agrees not to effect any public sale or distribution of any of its securities, or any securities convertible into or
exchangeable or exercisable for such securities (except pursuant to registrations on Form S-4 or S-8 or any successor
thereto), during the period beginning on the fifteenth (15th) day prior to the expected effective date (as determined by the
Company) of any Registration Statement in which Platinum is participating and ending on the earlier of (i) the date on which
all Registrable Securities registered on such Registration Statement are sold and (ii) 90 days after the actual effective
date of such Registration Statement (except as part of such registration).

 

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(b)          
If, in connection with any offering of Common Stock or other securities of the Company made pursuant to a Registration Statement,
whether or not any Registrable Securities of any Designated Holder are included in such offering, Platinum agrees with the Company
or any underwriter of such offering not to sell, hypothecate, offer for sale or in any way transfer any securities of the Company
held by Platinum for a specified time period not to exceed 180 days following the date of the final prospectus relating to such
offering (a “Platinum Lock-Up”), each other Designated Holder shall, upon request of the Company, promptly execute
and deliver a lock up agreement with respect to all securities of the Company held by such Designated Holder in form and substance
substantially similar to the Platinum Lock-Up (the “Designated Holder Lock-Up”). In furtherance of the foregoing, the
Company and its transfer agent and registrar are hereby authorized to decline to make any transfer of securities of the Company
held by a Designated Holder if such transfer would constitute, in substance, a violation or breach of the terms of the Designated
Holder Lock-Up, whether or not such Designated Holder has actually executed and delivered the Designated Holder Lock-Up required
pursuant to this Section 6(b).

 

7.           Registration
Procedures.

 

(a)          Obligations
of the Company. Whenever registration of Registrable Securities has been requested pursuant to Section 3, Section 4 or Section
5 of this Agreement, the Company shall use its commercially reasonable efforts to effect the registration and sale of such Registrable
Securities in accordance with the intended method of distribution thereof as quickly as practicable, and in connection with any
such request, the Company shall, as expeditiously as possible:

 

(i)          prepare
and file with the Commission (as promptly as practicable, but in any event not later than sixty (60) days after receipt of a request
to file a Registration Statement with respect to Registrable Securities) a Registration Statement on any form for which the Company
then qualifies or which counsel for the Company shall deem appropriate and which form shall be available for the sale of such Registrable
Securities in accordance with the intended method of distribution thereof, and cause such Registration Statement to become effective;
provided, however, that (x) before filing a Registration Statement or prospectus or any amendments or supplements thereto in which
Platinum is a selling stockholder, the Company shall provide counsel selected by Platinum (“Holders’ Counsel”)
and any other Inspector (as hereinafter defined) with an opportunity to review and comment on such Registration Statement and each
prospectus included therein (and each amendment or supplement thereto) to be filed with the Commission, subject to such documents
being under the Company’s control, and (y) the Company shall notify the Holders’ Counsel and each seller of Registrable
Securities of any stop order issued or threatened by the Commission and take all reasonable actions required to prevent the entry
of such stop order or to remove it if entered;

 

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(ii)         prepare
and file with the Commission such amendments and supplements to such Registration Statement and the prospectus used in connection
therewith as may be necessary to keep such Registration Statement effective for the lesser of (x) 180 days (except in the case
of a registration filed pursuant to Rule 415 of the Securities Act or any successor rule or regulation) and (y) such shorter period
which will terminate when all Registrable Securities covered by such Registration Statement have been sold, and comply with the
provisions of the Securities Act with respect to the disposition of all securities covered by such Registration Statement during
such period in accordance with the intended methods of disposition by the sellers thereof set forth in such Registration Statement;

 

(iii)        furnish
to each seller of Registrable Securities such number of copies of such Registration Statement, each amendment and supplement thereto
(in each case including all exhibits thereto), and the prospectus included in such Registration Statement (including each preliminary
prospectus) and any prospectus filed under Rule 424 under the Securities Act as each such seller may reasonably request in order
to facilitate the disposition of the Registrable Securities owned by such seller;

 

(iv)        register
or qualify such Registrable Securities under such other securities or “blue sky” laws of such jurisdictions as any
seller of Registrable Securities may reasonably request, and to continue such qualification in effect in such jurisdiction for
as long as permissible pursuant to the laws of such jurisdiction, or for as long as any such seller requests or until all of such
Registrable Securities are sold, whichever is shortest, and do any and all other acts and things which may be reasonably necessary
or advisable to enable any such seller to consummate the disposition in such jurisdictions of the Registrable Securities owned
by such seller; provided, however, that the Company shall not be required to (x) qualify generally to do business in any jurisdiction
where it would not otherwise be required to qualify but for this Section 7(a)(iv), (y) subject itself to taxation in any such jurisdiction
or (z) consent to general service of process in any such jurisdiction;

 

(v)         notify
each seller of Registrable Securities at any time when a prospectus relating thereto is required to be delivered under the Securities
Act, upon discovery that, or upon the happening of any event as a result of which, the prospectus included in such Registration
Statement contains an untrue statement of a material fact or omits to state any material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under which they were made, not misleading and the Company
shall promptly prepare a supplement or amendment to such prospectus and furnish to each seller of Registrable Securities a reasonable
number of copies of such supplement to or an amendment of such prospectus as may be necessary so that, after delivery to the purchasers
of such Registrable Securities, such prospectus shall not contain an untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they
were made, not misleading;

 

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(vi)        enter
into and perform customary agreements (including an underwriting agreement in customary form with the Approved Underwriter or Company
Underwriter, if any, selected as provided in Section 3, Section 4 or Section 5, as the case may be) and take such other actions
as are reasonably required in order to expedite or facilitate the disposition of such Registrable Securities, including causing
its officers to participate in “road shows” and other information meetings organized by the Approved Underwriter or
Company Underwriter;

 

(vii)       make
available at reasonable times for inspection by any seller of Registrable Securities, any managing underwriter participating in
any disposition of such Registrable Securities pursuant to a Registration Statement, Holders’ Counsel and any attorney or
accountant retained by any such seller or any managing underwriter (each, an “Inspector” and collectively, the “Inspectors”),
all financial and other records, pertinent corporate documents and properties of the Company and its subsidiaries (collectively,
the “Records”) as shall be reasonably necessary to enable them to exercise their due diligence responsibility, and
cause the Company’s and its subsidiaries’ officers, directors and employees, and the independent public accountants
of the Company, to supply all information reasonably requested by any such Inspector in connection with such Registration Statement.
Records that the Company determines, in good faith, to be confidential and which it notifies the Inspectors are confidential shall
not be disclosed by the Inspectors (and the Inspectors shall confirm their agreement in writing in advance to the Company if the
Company shall so request) unless (x) the disclosure of such Records is necessary, in the Company’s judgment, to avoid or
correct a misstatement or omission in the Registration Statement, (y) the release of such Records is ordered pursuant to a subpoena
or other order from a court of competent jurisdiction after exhaustion of all appeals therefrom or (z) the information in such
Records was known to the Inspectors on a non-confidential basis prior to its disclosure by the Company or has been made generally
available to the public. Each seller of Registrable Securities agrees that it shall, upon learning that disclosure of such Records
is sought in a court of competent jurisdiction, give notice to the Company and allow the Company, at the Company’s expense,
to undertake appropriate action to prevent disclosure of the Records deemed confidential;

 

(viii)      if
such sale is pursuant to an underwritten offering, obtain a “cold comfort” letters dated the effective date of the
Registration Statement and the date of the closing under the underwriting agreement from the Company’s independent public
accountants in customary form and covering such matters of the type customarily covered by “cold comfort” letters as
the managing underwriter reasonably requests;

 

(ix)         furnish,
at the request of any seller of Registrable Securities on the date such securities are delivered to the underwriters for sale
pursuant to such registration or, if such securities are not being sold through underwriters, on the date the Registration
Statement with respect to such securities becomes effective, an opinion, dated such date, of counsel representing the Company
for the purposes of such registration, addressed to the underwriters, if any, and to the seller making such request, covering
such legal matters with respect to the registration in respect of which such opinion is being given as the underwriters, if
any, and such seller may reasonably request and are customarily included in such opinions;

 

    	11

    	 

    

 

(x)          comply
with all applicable rules and regulations of the Commission, and make available to its security holders, as soon as reasonably
practicable but no later than fifteen (15) months after the effective date of the Registration Statement, an earnings statement
covering a period of twelve (12) months beginning after the effective date of the Registration Statement, in a manner which satisfies
the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder;

 

(xi)         cause
all such Registrable Securities to be listed on each securities exchange on which similar securities issued by the Company are
then listed, provided that the applicable listing requirements are satisfied;

 

(xii)        cooperate
with each seller of Registrable Securities and each underwriter participating in the disposition of such Registrable Securities
and their respective counsel in connection with any filings required to be made with FINRA;

 

(xiii)       use
its commercially reasonable efforts to cause the Registrable Securities covered by such Registration Statement to be registered
with or approved by such other governmental agencies or authorities as may be reasonably necessary by virtue of the business and
operations of the Company to enable the seller or sellers of Registrable Securities to consummate the disposition of such Registrable
Securities;

 

(xiv)      keep
each seller of Registrable Securities advised as to all material developments of any registration under Sections 3, 4 or 5 hereunder;

 

(xv)       provide officers’
certificates and other customary closing documents; and

 

(xvi)      take
all other steps reasonably necessary to effect the registration of the Registrable Securities contemplated hereby and reasonably
cooperate with the holders of such Registrable Securities to facilitate the disposition of such Registrable Securities pursuant
thereto.

 

(b)          Seller
Information. The Company may require each seller of Registrable Securities as to which any registration is being effected
to furnish, and such seller shall furnish, to the Company such information required to be included in such Registration Statement
by applicable securities laws or otherwise necessary or desirable in connection with the disposition of such Registrable Securities
as the Company may from time to time reasonably request in writing. If any seller of Registrable Securities fails to provide such
information required to be included in such Registration Statement by applicable securities laws or otherwise necessary or desirable
in connection with the disposition of such Registrable Securities in a timely manner after written request therefor, the Company
may exclude such seller’s Registrable Securities from a registration under Sections 3, 4 or 5 hereof.

 

    	12

    	 

    

 

(c)          Notice
to Discontinue. Each Designated Holders agrees, severally and not jointly, that, upon receipt of any notice from the Company
of the happening of any event of the kind described in Section 7(a)(v), such Designated Holder shall forthwith discontinue disposition
of Registrable Securities pursuant to the Registration Statement covering such Registrable Securities until such Designated Holder’s
receipt of the copies of the supplemented or amended prospectus contemplated by Section 7(a)(v) and, if so directed by the Company,
such Designated Holder shall deliver to the Company (at the Company’s expense) all copies, other than permanent file copies
then in such Designated Holder’s possession, of the prospectus covering such Registrable Securities which is current at
the time of receipt of such notice. If the Company shall give any such notice, the Company shall extend the period during which
such Registration Statement shall be maintained effective pursuant to this Agreement (including, without limitation, the period
referred to in Section 7(a)(ii)) by the number of days during the period from and including the date of the giving of such notice
pursuant to Section 7(a)(v) to and including the date when sellers of such Registrable Securities under such Registration Statement
shall have received the copies of the supplemented or amended prospectus contemplated by and meeting the requirements of Section
7(a)(v).

 

(d)          Registration
Expenses.        The Company shall pay all expenses arising from or incident to its
performance of, or compliance with, this Agreement, including, without limitation, (i) Commission, stock exchange and FINRA registration
and filing fees, (ii) all fees and expenses incurred in complying with securities or “blue sky” laws (including reasonable
fees, charges and disbursements of counsel to any underwriter incurred in connection with “blue sky” qualifications
of the Registrable Securities as may be set forth in any underwriting agreement), (iii) all printing, messenger and delivery expenses
and (iv) the fees, charges and expenses of counsel to the Company and of its independent public accountants and any other accounting
fees, charges and expenses incurred by the Company (including, without limitation, any expenses arising from any “cold comfort”
letters or any special audits incident to or required by any registration or qualification), regardless of whether such Registration
Statement is declared effective. All of the expenses described in the preceding sentence of this Section 7(d) are referred to
herein as “Registration Expenses.” A Designated Holder shall bear the expense of any broker’s commission or
underwriter’s discount or commission relating to registration and sale of its Registrable Securities and shall bear the
fees and expenses of its own counsel.

 

8.           Indemnification;
Contribution.

 

(a)          Indemnification
by the Company.       The Company agrees to indemnify and hold harmless each Designated
Holder, its partners, directors, officers, affiliates, members, employees and each Person who controls (within the meaning of
Section 15 of the Securities Act) such Designated Holder from and against any and all losses, claims, damages, liabilities and
expenses (including, but not limited to, reasonable costs and expenses of legal counsel or otherwise arising from any investigation,
action or proceeding, whether commenced or threatened, in respect to any of the foregoing) (each, a “Liability” and
collectively, “Liabilities”), arising out of or based upon any untrue, or allegedly untrue, statement of a material
fact contained in any Registration Statement, prospectus or preliminary prospectus or notification or offering circular (as amended
or supplemented if the Company shall have furnished any amendments or supplements thereto) or arising out of or based upon any
omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements
therein not misleading under the circumstances such statements were made, except insofar as such Liability arises out of or is
based upon any untrue statement or alleged untrue statement or omission or alleged omission contained in such Registration Statement,
preliminary prospectus or final prospectus in reliance and in conformity with information concerning such Designated Holder furnished
in writing to the Company by such Designated Holder expressly for use therein, including, without limitation, the information
furnished to the Company pursuant to Section 8(b).The Company shall also provide customary indemnities to any underwriters of
the Registrable Securities, their officers, directors and employees and each Person who controls such underwriters (within the
meaning of Section 15 of the Securities Act) to the same extent as provided above with respect to the indemnification of the Designated
Holders of Registrable Securities.

 

    	13

    	 

    

 

(b)          Indemnification
by Designated Holders.         In connection with any Registration Statement
in which a Designated Holder is participating pursuant to Section 3, Section 4 or Section 5 hereof, each such Designated Holder
shall promptly furnish to the Company in writing such information with respect to such Designated Holder as the Company may reasonably
request or as may be required by law for use in connection with any such Registration Statement or prospectus and all information
required to be disclosed in order to make the information previously furnished to the Company by such Designated Holder not materially
misleading or necessary to cause such Registration Statement not to omit a material fact with respect to such Designated Holder
necessary in order to make the statements therein not misleading. Each Designated Holder agrees severally to indemnify and hold
harmless the Company, the other Designated Holders who participate in the Registration Statement, any underwriter retained by
the Company and each Person who controls the Company, the other Designated Holders who participate in the Registration Statement
or such underwriter (within the meaning of Section 15 of the Securities Act) to the same extent as the foregoing indemnity from
the Company to the Designated Holders (including indemnification of their respective partners, directors, officers, members and
employees), but only to the extent that Liabilities arise out of or are based upon a statement or alleged statement or an omission
or alleged omission that was made in reliance upon and in conformity within formation with respect to such Designated Holder furnished
in writing to the Company by such Designated Holder expressly for use in such Registration Statement or prospectus, including,
without limitation, the information furnished to the Company pursuant to this Section 8(b); provided, however, that the total
amount to be indemnified by such Designated Holder pursuant to this Section 8(b) shall be limited to the net proceeds received
by such Designated Holder in the offering to which the Registration Statement or prospectus relates.

 

    	14

    	 

    

 

(c)          Conduct
of Indemnification Proceedings. Any Person entitled to indemnification or contribution hereunder (the “Indemnified
Party”)agrees to give prompt written notice to the indemnifying party (the “Indemnifying Party”) after the
receipt by the Indemnified Party of any written notice of the commencement of any action, suit, proceeding or investigation
or threat thereof made in writing for which the Indemnified Party intends to claim indemnification or contribution pursuant
to this Agreement; provided, however, that the failure so to notify the Indemnifying Party shall not relieve the Indemnifying
Party of any Liability that it may have to the Indemnified Party hereunder (except to the extent that the Indemnifying Party
is materially prejudiced or otherwise forfeits substantive rights or defenses by reason of such failure). If notice of
commencement of any such action is given to the Indemnifying Party as above provided, the Indemnifying Party shall be
entitled to participate in and, to the extent it may wish, jointly with any other Indemnifying Party similarly notified, to
assume the defense of such action at its own expense, with counsel chosen by it and reasonably satisfactory to such
Indemnified Party. Each Indemnified Party shall have the right to employ separate counsel in any such action and participate
in the defense thereof, but the fees and expenses of such counsel shall be paid by the Indemnified Party unless (i) the
Indemnifying Party agrees to pay the same, (ii) the Indemnifying Party fails to assume the defense of such action with
counsel reasonably satisfactory to the Indemnified Party or (iii) the named parties to any such action (including any
impleaded parties) include both the Indemnifying Party and the Indemnified Party and such parties have been advised by
such counsel that either (x) representation of such Indemnified Party and the Indemnifying Party by the same counsel would be
inappropriate under applicable standards of professional conduct or (y) there may be one or more legal defenses available to
the Indemnified Party which are different from or additional to those available to the Indemnifying Party. In any of such
cases, the Indemnifying Party shall not have the right to assume the defense of such action on behalf of such Indemnified
Party, it being understood, however, that the Indemnifying Party shall not be liable for the reasonable fees and expenses of
more than one separate firm of attorneys (in addition to any local counsel) for all Indemnified Parties and all such expenses
shall be reimbursed as incurred. No Indemnifying Party shall be liable for any settlement entered into without its written
consent, which consent shall not be unreasonably withheld. No Indemnifying Party shall, without the consent of such
Indemnified Party, effect any settlement of any pending or threatened proceeding in respect of which such Indemnified Party
is a party and indemnity has been sought hereunder by such Indemnified Party, unless such settlement includes an
unconditional release of such Indemnified Party from all liability for claims that are the subject matter of such proceeding.
Notwithstanding the foregoing, if at any time an Indemnified Party shall have requested the Indemnifying Party to reimburse
the Indemnified Party for fees and expenses of counsel as contemplated by this Section 8, the Indemnifying Party agrees that
it shall be liable for any settlement of any proceeding effected without the Indemnifying Party’s written consent if
(i) such settlement is entered into more than thirty (30) business days after receipt by the Indemnifying Party of the
aforesaid request and (ii) the Indemnifying Party shall not have reimbursed the Indemnified Party in accordance with such
request or contested the reasonableness of such fees and expenses prior to the date of such settlement.

 

(d)          Contribution.
If the indemnification provided for in this Section 8 from the Indemnifying Party is unavailable to an Indemnified Party hereunder
or insufficient to hold harmless an Indemnified Party in respect of any Liabilities referred to herein, then each Indemnifying
Party, in lieu of indemnifying such Indemnified Party, shall contribute to the amount paid or payable by such Indemnified Party
as a result of such Liabilities in such proportion as is appropriate to reflect the relative fault of the Indemnifying Party and
Indemnified Party in connection with the actions which resulted in such Liabilities, as well as any other relevant equitable considerations.
The relative faults of such Indemnifying Party and Indemnified Party shall be determined by reference to, among other things,
whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission
to state a material fact, has been made by, or relates to information supplied by, such Indemnifying Party or Indemnified Party,
and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such action. The
amount paid or payable by a party as a result of the Liabilities referred to above shall be deemed to include, subject to the
limitations set forth in Sections 8(a), 8(b) and 8(c), any legal or other fees, charges or expenses reasonably incurred by such
party in connection with any investigation or proceeding; provided that the total amount to be contributed by any Designated Holder
shall be limited to the net proceeds received by such Designated Holder in the offering.

 

    	15

    	 

    

 

The parties hereto agree
that it would not be just and equitable if contribution pursuant to this Section 8(d) were determined by pro rata allocation or
by any other method of allocation which does not take account of the equitable considerations referred to in the immediately preceding
paragraph. No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be
entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation.

 

9.          Rule
144.        The Company covenants that from and after the IPO Effectiveness Date it
shall (a) file any reports required to be filed by it under the Exchange Act and (b) take such further action as Platinum may
reasonably request (including providing any information necessary to comply with Rule 144 under the Securities Act), all to the
extent required from time to time to enable the Designated Holders to sell Registrable Securities without registration under the
Securities Act within the limitation of the exemptions provided by (i) Rule 144 under the Securities Act, as such rule may be
amended from time to time, or Regulation S under the Securities Act or (ii) any similar rules or regulations hereafter adopted
by the Commission. The Company shall, upon the request of Platinum, deliver to Platinum a written statement as to whether it has
complied with such requirements.

 

10.         Miscellaneous.

 

(a)          Recapitalizations,
Exchanges, etc.     The provisions of this Agreement shall apply to the full extent set forth
herein with respect to (i) the shares of Common Stock, (ii) any and all shares of voting common stock of the Company into which
the shares of Common Stock are converted, exchanged or substituted in any recapitalization or other capital reorganization by
the Company and (iii) any and all equity securities of the Company or any successor or assign of the Company (whether by merger,
consolidation, sale of assets or otherwise) which may be issued in respect of, in conversion of, in exchange for or in substitution
of, the shares of Common Stock and shall be appropriately adjusted for any stock dividends, splits, reverse splits, combinations,
recapitalizations and the like occurring after the date hereof. The Company shall cause any successor or assign (whether by merger,
consolidation, sale of assets or otherwise) to enter into a new registration rights agreement with the Designated Holders on terms
substantially the same as this Agreement as a condition of any such transaction.

 

(b)          No
Inconsistent Agreements. The Company hereby represents and warrants that it has not previously entered into
any agreement granting registration rights to any Person with respect to any securities of the Company. The Company shall not
enter into any agreement with respect to its securities that is inconsistent with the rights granted to the Designated
Holders in this Agreement or grant any additional registration rights to any Person or with respect to any securities that
are not Registrable Securities that provides for the priority in registration of such securities over the Registrable
Securities held by the Designated Holders or which rights are otherwise inconsistent with the rights granted in this
Agreement.

 

    	16

    	 

    

 

(c)          Remedies.       The
Designated Holders, in addition to being entitled to exercise all rights granted by law, including recovery of damages, shall
be entitled to specific performance of their rights under this Agreement. The Company agrees that monetary damages would not be
adequate compensation for any loss incurred by reason of a breach by it of the provisions of this Agreement and hereby agrees
to waive in any action for specific performance the defense that a remedy at law would be adequate.

 

(d)          Amendments
and Waivers.     Except as otherwise provided herein, the provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from the provisions hereof may not be given unless consented
to in writing by the Company, Platinum and the Designated Holders (including Platinum) holding a majority of the Registrable Securities.

 

(e)          Notices.   All
notices, demands and other communications provided for or permitted hereunder shall be made in writing and shall be made by registered
or certified first-class mail, return receipt requested, telecopier, courier service or personal delivery:

 

	 	(i)	if to the Company:
	 	 	 
	 	 	Urigen Pharmaceuticals, Inc.
	 	 	501 Silverside Road PMB #95
	 	 	Wilmington, DE 19809
	 	 	 
	 	 	with a copy to:
	 	 	 
	 	 	Pryor Cashman LLP
	 	 	7 Times Square
	 	 	New York, NY 10036-6569
	 	 	 
	 	(ii)	if to Platinum:
	 	 	 
	 	 	Platinum-Montaur Life Sciences, LLC
	 	 	152 West 57th Street, Fourth Floor
	 	 	New York, NY 10019
	 	 	 
	 	 	with a copy to:
	 	 	 
	 	 	Burak Anderson & Melloni, PLC
	 	 	30 Main Street, Suite 210
	 	 	Burlington, VT 05401
	 	 	 
	 	(iii)	if to any other Designated Holder:
	 	 	 
	 	 	at the address set forth in the books and records of the
Company.

 

    	17

    	 

    

 

All such notices, demands
and other communications shall be deemed to have been duly given when delivered by hand, if personally delivered; one (1) Business
Day after delivered by courier, if delivered by commercial courier service; five (5) Business Days after being deposited in the
mail, postage prepaid, if mailed; and one (1) Business Day after receipt is mechanically acknowledged, if telecopied. Any party
may by notice given in accordance with this Section 10(e) designate another address or Person for receipt of notices hereunder.

 

(f)           Successors
and Assigns; Third Party Beneficiaries. This Agreement shall inure to the benefit of and be binding upon the successors and
assigns of the parties hereto. All of the obligations of the Company and the Designated Holders hereunder shall survive any such
transfer. Except as provided in Section 8, no Person other than the parties hereto and their successors and assigns is intended
to be a beneficiary of this Agreement.

 

(g)          Counterparts.
This Agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

 

(h)          Headings.         The
headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof.

 

(i)           Governing
Law.          THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAW THEREOF.

 

(j)           Severability.
If any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal
or unenforceable in any respect for any reason, the validity, legality and enforceability any such provision in every other respect
and of the remaining provisions hereof shall not be in any way impaired.

 

(k)          Rules
of Construction.         Unless the context otherwise requires, references to
sections or subsections refer to sections or subsections of this Agreement.

 

(l)           Entire
Agreement. This Agreement is intended by the parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter contained herein.
There are no restrictions, promises, representations, warranties or undertakings, other than those set forth or referred to herein.
This Agreement supersedes all prior agreements and understandings among the parties with respect to such subject matter.

 

(m)         Further
Assurances. Each of the parties shall execute such documents and perform such further acts as may be reasonably required or
desirable to carry out or to perform the provisions of this Agreement.

 

    	18

    	 

    

 

(n)          Other
Agreements. Nothing contained in this Agreement shall be deemed to be a waiver of, or release from, any obligations any party
hereto may have under, or any restrictions on the transfer of Registrable Securities or other securities of the Company imposed
by, any other agreement.

 

[Remainder of page intentionally left blank]

 

    	19

    	 

    

 

IN WITNESS WHEREOF, the undersigned have executed,
or have caused to be executed, this Registration Rights Agreement on the date first written above.

 

	 	URIGEN PHARMACEUTICALS, INC.
	 	 	 
	 	By:	/s/ Dan Vickery 
	 	 	Name: Dan Vickery 
	 	 	Title: Chairman 
	 	 
	 	PLATINUM-MONTAUR LIFE SCIENCES, LLC
	 	 	 
	 	By:	/s/ Will Slota 
	 	 	Name: Will Slota
	 	 	Title: Authorized Signature 
	 	 
	 	OTHER HOLDERS 
	 	 	 
	 	By:	 

 

    	20Exhibit 10.5 

 

GUARANTY 

 

GUARANTY (this
“Guaranty”), dated as of June 23, 2014, is by Urigen N.A., Inc., a Delaware corporation with an address of
501 Silverside Road, PMB #95, Wilmington, DE 19809 (the “Guarantor”), in favor of the parties set forth on Annex
A hereto (together with their respective successors and assigns, the “Guaranteed Parties”).

 

WHEREAS, the Guarantor is a subsidiary and affiliate
of Urigen Pharmaceuticals, Inc. (the “Company”);

 

WHEREAS, the Guaranteed
Parties shall, on the date hereof, become the holders of Senior Secured Convertible Promissory Notes from the Company dated as
of the date hereof (as amended, restated, supplemented or otherwise modified, the “Exchange Notes”), pursuant
to the terms of an Exchange and Waiver Agreement (the “Exchange Agreement”), dated as of the date hereof, between
the Guaranteed Party and the Company;

 

WHEREAS, Platinum-Montaur
Life Sciences, LLC (“Platinum”) shall, on the date hereof, become the holder of a Promissory Note from the
Company dated as of the date hereof in the original principal amount of $3,000,000 (the “Bridge Note” and,
together with the Exchange Notes, the “Guaranteed Notes”);

 

WHEREAS, in order to induce
the Guaranteed Parties, including Platinum, to surrender and exchange certain existing promissory notes (the “Surrendered
Notes”) issued by the Company for the Guaranteed Notes, and in order to induce Platinum to extend credit to the Company
evidenced by the Bridge Note, the Guarantor is willing to guaranty the Company’s obligations under the Guaranteed Notes;
and

 

WHEREAS, the issuance of
the Guaranteed Notes will be beneficial to the Guarantor as the Guarantor has guaranteed the payment and performance in full of
the Surrendered Notes, which Surrendered Notes are currently in default.

 

NOW, THEREFORE, in order
to induce the Guaranteed Parties to surrender and exchange the Surrendered Notes for the Guaranteed Notes and induce Platinum to
extend credit evidenced by the Bridge Note, and for other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged by the Guarantor, the Guarantor hereby agrees as follows:

 

Section 1 - Guaranty of Payment and Performance 

 

The Guarantor hereby guarantees
to the Guaranteed Parties the full and punctual payment when due (whether at maturity, by acceleration or otherwise), and the performance,
of all Obligations.

 

As used herein, “Obligations”
means and includes all of the liabilities and obligations (primary, secondary, direct, contingent, sole, joint or several) due
or to become due, or that are now or may be hereafter contracted or acquired, or owing, of the Company to the Guaranteed Parties
under the Guaranteed Notes, whether now or hereafter existing, voluntary or involuntary, direct or indirect, absolute or contingent,
liquidated or unliquidated, whether or not jointly owed with others, and whether or not from time to time decreased or extinguished
and later increased, created or incurred, and all or any portion of such obligations or liabilities that are paid, to the extent
all or any part of such payment is avoided or recovered directly or indirectly from the Guaranteed Parties as a preference, fraudulent
transfer or otherwise.

 

    	 

    	 

    

 

This Guaranty is an absolute, unconditional
and continuing guaranty of the full and punctual payment and performance of the Obligations and not of their collectibility only
and is in no way conditioned upon any requirement that the Guaranteed Parties first attempt to collect any of the Obligations from
the Company or resort to any security or other means of obtaining their payment. Should the Company default in the payment or performance
of any of the Obligations, the obligations of the Guarantor hereunder shall become immediately due and payable to the Guaranteed
Parties, without demand or notice of any nature, all of which are expressly waived by the Guarantor. Payments by the Guarantor
hereunder may be required by the Guaranteed Parties on any number of occasions.

 

Section 2 - Guarantor’s Agreement to Pay.

 

The Guarantor further agrees, as
the principal obligor and not as a guarantor only, to pay to the Guaranteed Parties, on demand, all reasonable costs and expenses
(including court costs and reasonable legal expenses) incurred or expended by the Guaranteed Parties in connection with enforcement
of this Guaranty, together with interest on amounts recoverable under this Guaranty from the time such amounts become due under
this Guaranty until payment, at the rate per annum equal to the default rate set forth in the applicable Guaranteed Note; provided
that if such interest exceeds the maximum amount permitted to be paid under applicable law, then such interest shall be reduced
to such maximum permitted amount.

 

Section 3 - Unlimited Guaranty.

 

The liability of the Guarantor
hereunder shall be unlimited to the extent of the Obligations and the other obligations of the Guarantor hereunder (including,
without limitation, under Section 2 above). The Guarantor hereby covenants not to take any action that would constitute
(or otherwise cause) an Event of Default under the Guaranteed Notes.

 

Section 4 - Waivers by Guarantor; Guaranteed Parties’
Freedom to Act.

 

The Guarantor agrees that the Obligations
will be paid and performed strictly in accordance with their respective terms regardless of any law, regulation or order now or
hereafter in effect in any jurisdiction affecting any of such terms or the rights of the Guaranteed Parties with respect thereto.
The Guarantor waives presentment, demand, protest, notice of acceptance, notice of Obligations incurred and all other notices of
any kind, all defenses which may be available to Company by virtue of any valuation, stay, moratorium law or other similar law
now or hereafter in effect, any right to require the marshalling of assets of the Company, and all suretyship defenses generally.
Without limiting the generality of the foregoing, the Guarantor agrees to the provisions of any instrument evidencing, securing
or otherwise executed in connection with any Obligation and agrees that the obligations of the Guarantor hereunder shall not be
released or discharged, in whole or in part, or otherwise affected by (i) the failure of any Guaranteed Party to assert any claim
or demand or to enforce any right or remedy against the Company; (ii) any extensions or renewals of any Obligation; (iii) any rescissions,
waivers, amendments or modifications of any of the terms or provisions of any agreement evidencing, securing or otherwise executed
in connection with any Obligation (provided, that, the obligations of the Guarantor hereunder shall be appropriately modified to
reflect any amendment or modification of the Obligations); (iv) the substitution or release of any entity primarily or secondarily
liable for any Obligation; (v) the adequacy of any rights any Guaranteed Party may have against any collateral or other means of
obtaining repayment of the Obligations; (vi) the impairment of any collateral securing the Obligations, including without limitation
the failure to perfect or preserve any rights a Guaranteed Party might have in such collateral or the substitution, exchange, surrender,
release, loss or destruction of any such collateral; or (vii) any other act or omission which might in any manner or to any extent
vary the risk of the Guarantor or otherwise operate as a release or discharge of any other guarantor, all of which may be done
without notice to the Guarantor.

 

    	-2-

    	 

    

 

Section 5 - Unenforceability of Obligations
Against Company.

 

If for any reason the Company has
no legal existence or is under no legal obligation to discharge any of the Obligations, or if any of the Obligations have become
irrecoverable from the Company by operation of law or for any other reason, this Guaranty shall nevertheless be binding on the
Guarantor to the same extent as if the Guarantor at all times had been the principal obligor on all such Obligations. In the event
that acceleration of the time for payment of the Obligations is stayed upon the insolvency, bankruptcy or reorganization of the
Company, or for any other reason, all such amounts otherwise subject to acceleration under the terms of any agreement evidencing,
securing or otherwise executed in connection with any Obligation shall be immediately due and payable by the Guarantor.

 

Section 6 - Subrogation; Subordination.

 

Until the payment and performance
in full of all Obligations, the Guarantor shall not exercise any rights against the Company arising as a result of payment by any
Guarantor hereunder, by way of subrogation or otherwise, and will not prove any claim in competition with any Guaranteed Party
or its affiliates in respect of any payment hereunder in bankruptcy or insolvency proceedings of any nature; the Guarantor will
not claim any set-off or counterclaim against the Company in respect of any liability of the Guarantor to the Company; and the
Guarantor waives any benefit of and any right to participate in any collateral which may be held by any Guaranteed Party. The payment
of any amounts due with respect to any indebtedness of the Company now or hereafter held by the Guarantor is hereby subordinated
to the prior payment in full of the Obligations. The Guarantor agrees that after the occurrence of any default in the payment or
performance of the Obligations, after the expiration of any applicable cure period, it will not demand, sue for or otherwise attempt
to collect after such time any such indebtedness of the Company to the Guarantor until the Obligations shall have been paid in
full. If, notwithstanding the foregoing sentence, the Guarantor shall collect, enforce or receive any amounts in respect of such
indebtedness, such amounts shall be collected, enforced and received by the Guarantor as trustee for the Guaranteed Parties and
be paid over to the Guaranteed Parties on account of the Obligations without affecting in any manner the liability of the Guarantor
under the other provisions of this Guaranty.

 

    	-3-

    	 

    

 

Section 7 - Further Assurances.

 

The Guarantor agrees to do all
such things and execute all such documents, as the Guaranteed Party may consider reasonably necessary or desirable to give full
effect to this Guaranty and to perfect and preserve the rights and powers of the Guaranteed Party hereunder.

 

Section 8 - Termination; Reinstatement.

 

This Guaranty shall remain in full
force and effect until the earlier of: (i) the Obligations are paid in full or otherwise satisfied (including by the conversion
in full of the Guaranteed Notes) (other than contingent indemnity obligations), and not subject to any recapture or preference
in bankruptcy or similar proceedings, and the Guaranteed Parties have no further commitment to extend credit to the Company or
(ii) the Guaranteed Parties are given written notice of the Guarantor’s intention to discontinue this Guaranty, notwithstanding
any intermediate or temporary payment or settlement of the whole or any part of the Obligations. No such notice under (ii) above
shall be effective against a Guaranteed Party unless received and acknowledged by an officer of a Guaranteed Party. Without limiting
the generality of the foregoing sentence, the Guarantor will be released from all liability hereunder concurrently with either
the repayment in full of all amounts owed under the Guaranteed Notes or the conversion in full of the Guaranteed Notes. No notice
under (ii) above shall affect any rights of a Guaranteed Party or of any affiliate hereunder with respect to any Obligations incurred
prior to such notice. This Guaranty shall continue to be effective or be reinstated, notwithstanding any notice or termination,
if at any time any payment made or value received with respect to an Obligation is rescinded or must otherwise be returned by a
Guaranteed Party upon the insolvency, bankruptcy or reorganization of the Company, or otherwise, all as though such payment had
not been made or value received.

 

Section 9 - Successors and Assigns.

 

This Guaranty shall be jointly
and severally binding upon the Guarantor, its successors and assigns, and shall inure to the benefit of and be enforceable by the
Guaranteed Parties and its successors, transferees and assigns. Without limiting the generality of the foregoing sentence, the
Guaranteed Parties may assign or otherwise transfer any agreement or any note held by them evidencing, securing or otherwise executed
in connection with the Obligations, or sell participations in any interest therein, to any other person or entity, and such other
person or entity shall thereupon become vested, to the extent set forth in the agreement evidencing such assignment, transfer or
participation, with all the rights in respect thereof granted to the Guaranteed Parties herein.

 

Section 10 - Amendments and Waivers.

 

No amendment or waiver of any provision
of this Guaranty nor consent to any departure by the Guarantor therefrom shall be effective unless the same shall be in writing
and signed by the Guaranteed Parties holding a majority of the unpaid principal amount of the Guaranteed Notes, subject, to the
extent applicable, to the Amended Intercreditor Agreement. No failure on the part of a Guaranteed Party to exercise, and no delay
in exercising, any right hereunder shall operate as a waiver thereof; nor shall any single or partial exercise of any right hereunder
preclude any other or further exercise thereof or the exercise of any other right.

 

    	-4-

    	 

    

 

Section 11 - Notices.

 

All notices and other communications
called for hereunder shall be made in writing and, unless otherwise specifically provided herein, shall be deemed to have been
duly made or given when delivered by hand or mailed first class mail postage prepaid or, in the case of telegraphic or telexed
notice, when transmitted, answer back received, addressed as follows: if to the Guarantor, at the address set forth above, and
if to a Guaranteed Party, at the address set forth in the Exchange Agreement.

 

Section 12 - Governing Law; Consent to Jurisdiction.

 

This Guaranty shall be governed
by, and construed in accordance with, the laws of the State of New York without reference to its conflicts of laws provisions.
The Guarantor agrees that any suit for the enforcement of this Guaranty may be brought in the courts of the State of New York or
any federal court sitting therein and consents to the non-exclusive jurisdiction of such court and to service of process in any
such suit being made upon the Guarantor by mail at the address specified in Section 11 hereof. The Guarantor hereby waives any
objection that it may now or hereafter have to the venue of any such suit or any such court or that such suit was brought in an
inconvenient court. Any enforcement action relating to this Guaranty may be brought by motion for summary judgment in lieu of a
complaint pursuant to Section 3213 of the New York Civil Practice Law and Rules. In no event shall the rate of interest payable
hereunder exceed the maximum rate (if any) permitted by applicable law.

 

Section 13 - WAIVER OF JURY TRIAL.

 

THE GUARANTOR AND, BY THEIR
ACCEPTANCE OF THIS GUARANTY, EACH GUARANTEED PARTY, HEREBY WAIVES TRIAL BY JURY IN ANY LITIGATION IN ANY COURT WITH RESPECT TO,
IN CONNECTION WITH, OR ARISING OUT OF: (A) THIS GUARANTY OR ANY OTHER INSTRUMENT OR DOCUMENT DELIVERED IN CONNECTION WITH THE
OBLIGATIONS; (B) THE VALIDITY, INTERPRETATION, COLLECTION OR ENFORCEMENT THEREOF; OR (C) ANY OTHER CLAIM OR DISPUTE HOWEVER ARISING
BETWEEN THE GUARANTOR AND ANY GUARANTEED PARTY.

 

Section 14 -Certain References.

 

All pronouns and any variations
thereof shall be deemed to refer to the masculine, feminine, neuter, singular or plural, as the identity of the person, persons,
entity or entities may require. The terms “herein”, “hereof” or “hereunder” or similar terms
used in this Guaranty refer to this entire Guaranty and not only to the particular provision in which the term is used.

 

Section 15 - Miscellaneous.

 

This Guaranty, together with the
other Transaction Documents (as defined in the Exchange Agreement) to which the Guarantor is a party, constitutes the entire agreement
of the Guarantor with respect to the matters set forth herein. The rights and remedies herein provided are cumulative and not exclusive
of any remedies provided by law or any other agreement, and this Guaranty shall be in addition to any other guaranty of the Obligations.
The invalidity or unenforceability of any one or more sections of this Guaranty shall not affect the validity or enforceability
of its remaining provisions. Captions are for the ease of reference only and shall not affect the meaning of the relevant provisions.
The meanings of all defined terms used in this Guaranty shall be equally applicable to the singular and plural, masculine, feminine
and generic forms of the terms defined.

 

    	-5-

    	 

    

 

IN WITNESS WHEREOF, the Guarantor has caused
this Guaranty to be executed and delivered as of the date appearing in the introductory paragraph of this Guaranty.

 

	URIGEN N.A., INC.	 
	 	 	 
	By:	/s/ Dan Vickery 	 
	 	Name: Dan Vickery 	 
	 	Title: President 	 

 

[Guaranty]

 

    	 

    	 

    

 

Annex A

 

Platinum-Montaur Life Sciences, LLC

Carlo Di Fonzo

Larry Ebelhar

Robert J. Evans, MD

EGB Advisors, LLC

Lewis Lorenz

Dorothy S Lowry Trust

Pam Marrs

Matt Meenan

Greg Palmer

C. Lowell Parsons

Kellogg Parsons

Jeff Proctor

Dr. Dan Vickery

Ron Woodson

[Cato]

 

[Guaranty]

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