Document:

Exhibit 4.8

 

THIS NOTE AND THE SECURITIES ISSUABLE UPON
THE CONVERSION HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”),
OR UNDER THE SECURITIES LAWS OF ANY STATES IN THE UNITED STATES. THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY
AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS PERMITTED UNDER THE ACT AND THE APPLICABLE STATE SECURITIES LAWS,
PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL IN FORM AND
SUBSTANCE SATISFACTORY TO THE ISSUER TO THE EFFECT THAT ANY PROPOSED TRANSFER OR RESALE IS IN COMPLIANCE WITH THE ACT AND ANY APPLICABLE
STATE SECURITIES LAWS.

 

SECURED
CONVERTIBLE PROMISSORY NOTE

 

	Date of Note:	October 24, 2019
	 	 
	Principal Amount of Note:	US $2,930,000

 

For value received
Citta, Inc., a Delaware corporation (the “Company”),
promises to pay to the undersigned holder or such party’s assigns (the “Holder”) the Principal
Amount with simple interest on the outstanding Principal Amount at the rate of 6% per annum (the “Interest Rate”).
Interest shall commence on the Effective Date and shall continue on the outstanding Principal Amount until paid in full or converted.
Interest shall be computed on the basis of a year of 365 days for the actual number of days elapsed. The Balance shall be due and
payable upon written request of Holder on or after the date that is the due date of the last Monthly Balance Payment (defined herein)
(the “Maturity Date”).

 

1.            Definitions

 

“Amortization
Trigger” shall mean the earliest to occur of the following: (i) the Conversion Trigger, (ii) the
Company having continuous positive cash flow for two (2) consecutive calendar quarters, or (iii) the second (2nd)
anniversary of the issuance of this Note.

 

“Amortization
Trigger Date” shall mean the date in which the Amortization Trigger occurs.

 

“Accrued
Interest” shall mean, at the applicable time, the sum of all the then accrued but unpaid interest under this Note.

 

“APA”
means that certain asset purchase agreement between the Company and Holder, dated _____, 2019.

 

“Balance”
shall mean, at the applicable time, the sum of all then outstanding Principal Amount plus the Accrued Interest.

 

“Collateral”
is all of the Company’s right, title and interest in and to the following personal property (as such terms are defined under
the UCC): all goods, equipment, inventory, contract rights or rights to payment of money, leases, license agreements, franchise
agreements, general intangibles (including payment intangibles), accounts (including health-care receivables), documents, instruments
(including any promissory notes), chattel paper (whether tangible or electronic), cash, deposit accounts, fixtures, letters of
credit rights (whether or not the letter of credit is evidenced by a writing), securities, and all other investment property, supporting
obligations, and financial assets, whether now owned or hereafter acquired, wherever located.

 

    

     

    

 

“Conversion
Trigger” means the consummation of an equity investment in the Company’s capital stock, with proceeds of at
least US $10,000,000.00 (including the amount covered by a conversion of any outstanding convertible notes and debts into shares
of capital stock of the Company under the aforesaid equity investment transaction or series of transactions).

 

“Effective
Date” shall mean the date as set forth above.

 

“Net
Proceeds” shall mean the gross cash amount received by the Company in consideration for granting licenses to third
parties to use the Purchased Assets (as defined in the APA), less all direct costs related to the sale of such license(s), including,
without limitation, legal costs, consulting costs (including, by way of example, in respect of consulting services received from
any former Fifth Dimension Ltd. employee or consultant), and/or equipment costs.

 

“Note”
mean this secured convertible promissory note.

 

“Principal
Amount” shall mean US $2,930,000 plus any amount of Trigger Date Accrued Interest added thereto.

 

“Trigger
Date Accrued Interest” shall mean the amount equal to the Accrued Interest as of the Amortization Trigger Date.

 

“UCC”
means the Uniform Commercial Code as the same is, from time to time, in effect in the State of New York, US; provided that in the
event that, by reason of mandatory provisions of law, any or all of the attachment, perfection or priority of, or remedies with
respect to, Lender’s lien on any Collateral is governed by the Uniform Commercial Code as the same is, from time to time,
in effect in a jurisdiction other than the State of New York, US, then the term “UCC” shall mean the Uniform Commercial
Code as in effect, from time to time, in such other jurisdiction solely for purposes of the provisions thereof relating to such
attachment, perfection, priority or remedies and for purposes of definitions related to such provisions.

 

2.            Repayment.

 

(a)            Interest-Only
Payment Schedule. Commencing on the first day of the month after the Amortization Trigger Date, the Company shall commence
payment of the Trigger Date Accrued Interest in twelve (12) monthly installments (the “Monthly Trigger Payments”),
with each additional Monthly Trigger Payment due on the 1st day of each month thereafter. Notwithstanding the foregoing,
if the Amortization Trigger Date is the second (2nd) anniversary of the issuance of this Note, only fifty percent (50%) of the
Trigger Date Accrued Interest shall be payable over such twelve (12) month period and the remaining fifty percent (50%) of the
Trigger Date Accrued Interest shall be added to the Principal Amount as of the Amortization Trigger Date.

 

(b)            Principal
and Interest Repayment Schedule. Commencing on the first day of the month after the last Monthly Trigger Payment was due, the
Balance of the Note shall be repaid in equal, fully-amortized monthly installments (each, a “Monthly Balance Payment”)
over a period equal to thirty-six (36) months, with each Monthly Balance Payment due on first day of each month.

 

(c)            Prepayment.
The Company may prepay all or a portion of this Note, and apply such payment to the Accrued Interest or outstanding Principal Amount,
in any manner it chooses, at its discretion, at any time, without the consent of the Holder, and without any penalties or fees;
provided, however, that prior to any such prepayment prior to the occurrence of Conversion Trigger, the Company shall
grant Holder the right to convert all or part of the Balance into shares of Common Stock of the Company at a pre-money valuation
to be mutually agreed by the parties hereto, acting in good faith.

 

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(d)            Acceleration
of Repayment. In the event that, prior to the Maturity Date, and solely to the extent that the Balance has not been fully
repaid or converted pursuant to Section 3 hereunder, the Company closes a technology license or multiple licenses for
the use of any of the assets it purchased from the Holder under the APA, in the intelligence, police, security or law
enforcement industries, or other similar industries, the Company shall be required to repay Holder, within thirty (30) days
of the close of such licensing transaction, an amount, up to and on account of the Balance, equal to sixty percent (60%) of
the Net Proceeds received by the Company pursuant to such transaction (the “Licensing Fee”). In
addition, to the extent that the Licensing Fee exceeds the Balance, Holder shall additionally be entitled to receive 50% of
such excess amount. Any amounts paid by the Company to Holder pursuant to the Licensing Fee shall be applied (i) first
to repayment of outstanding Principal Amount, and (ii) second to the payment of Accrued Interest.

 

(e)            Change
of Control. If there occurs a merger or consolidation of the Company, sale or licensing of all or substantially all of
the assets of the Company, or other transaction a result of which the equity holders of the Company immediately prior to such merger,
consolidation, sale, license or other transaction do not own, immediately following the consummation thereof, a majority of the
voting power of the surviving or acquiring entity on account of their equity interests in the Company immediately prior to such
transaction (a “Sale of the Company”), then at the election of the Holder the Balance may become immediately
due and payable. Before Holder shall be entitled to receive payment pursuant to this paragraph, the Holder shall surrender this
Note, duly endorsed, at the principal offices of the Company or any transfer agent of the Company.

 

3.            Conversion.

 

(a)            Conversion
upon a Qualified Financing. Upon the occurrence of a Conversion Trigger on or before the Maturity Date (a “Qualified
Financing”), then Holder shall be entitled to, but not obligated to, convert the Balance of this Note, in whole or
in part, into the securities sold in the Qualified Financing (“Equity Securities”) at a conversion price
equal to (x) the cash price paid per share for Equity Securities by the investors in the Qualified Financing (the “Investors”)
multiplied by (y) 0.80, by providing written notice to the Company (a “Conversion Notice”). The
issuance of Equity Securities pursuant to the conversion of this Note shall be upon and subject to the same terms and conditions
applicable to Equity Securities sold in the Qualified Financing. The Conversion Notice must set forth the amount of the Balance
that will be converted pursuant to this Section 3(a) and must be provided within ten (10) business
days of receipt of written notice from the Company of a Qualified Financing. Notwithstanding this paragraph, if the conversion
price of this Note as determined pursuant to this paragraph (the “Conversion Price”) is less than the
price per share at which Equity Securities are issued in the Qualified Financing, the Company may, solely at its option, elect
to convert this Note into shares of a newly created series of preferred stock having the identical rights, privileges, preferences
and restrictions as the Equity Securities issued in the Qualified Financing, and otherwise on the same terms and conditions, other
than with respect to (if applicable): (i) the per share liquidation preference and the conversion price for purposes of price-based
anti-dilution protection, which will equal the Conversion Price; and (ii) the per share dividend, which will be the same percentage
of the Conversion Price as applied to determine the per share dividends of the Investors in the Qualified Financing relative to
the purchase price paid by the Investors.

 

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(b)            Procedure
for Conversion. In connection with any conversion of this Note into capital stock, the Holder shall surrender this Note to
the Company and deliver to the Company any documentation reasonably required by the Company (including, in the case of a Qualified
Financing, all financing documents executed by the Investors in connection with such Qualified Financing; provided, however, that
such financing documents shall not require the Holder, whether as part of such Qualified Financing or any future transaction, to
enter into any restrictive covenant or provide any joint and several indemnity or any indemnity in excess of the amount payable
to the Holder as a result of such future transaction).  The Company shall not be required to issue or deliver the capital
stock into which this Note may convert until the Holder has surrendered this Note to the Company and delivered to the Company any
such documentation.  Upon the conversion of this Note into capital stock pursuant to the terms hereof, in lieu of any fractional
shares to which the Holder would otherwise be entitled, the Company shall pay the Holder cash equal to such fraction multiplied
by the price at which this Note converts.

 

4.            Representations
and Warranties.

 

(a)            Representations
and Warranties of the Company. The Company hereby represents and warrants to the Holder as of the date the first Note was issued
as follows:

 

(i)            Organization,
Good Standing and Qualification. The Company is a corporation duly organized, validly existing and in good standing under the
laws of the State of Delaware. The Company has the requisite corporate power to own and operate its properties and assets and to
carry on its business as now conducted and as proposed to be conducted. The Company is duly qualified and is authorized to do business
and is in good standing as a foreign corporation in all jurisdictions in which the nature of its activities and of its properties
(both owned and leased) makes such qualification necessary, except for those jurisdictions in which failure to do so would not
have a material adverse effect on the Company or its business (a “Material Adverse Effect”).

 

(ii)            Corporate
Power. The Company has all requisite corporate power to issue this Note and to carry out and perform its obligations under
this Note. The Company’s Board of Directors (the “Board”) has approved the issuance of this Note
based upon a reasonable belief that the issuance of this Note is appropriate for the Company after reasonable inquiry concerning
the Company’s financing objectives and financial situation.

 

(iii)            Authorization.
All corporate action on the part of the Company, the Board and the Company’s stockholders necessary for the issuance and
delivery of this Note has been taken. This Note constitutes a valid and binding obligation of the Company enforceable in accordance
with its terms, subject to laws of general application relating to bankruptcy, insolvency, the relief of debtors and, with respect
to rights to indemnity, subject to federal and state securities laws. Any securities issued upon conversion of this Note (the “Conversion
Securities”), when issued in compliance with the provisions of this Note, will be validly issued, fully paid, nonassessable,
free of any liens or encumbrances and issued in compliance with all applicable federal and securities laws.

 

(iv)            Governmental
Consents. All consents, approvals, orders or authorizations of, or registrations, qualifications, designations, declarations
or filings with, any governmental authority required on the part of the Company in connection with issuance of this Note has been
obtained.

 

(v)            Compliance
with Laws. To its knowledge, the Company is not in violation of any applicable statute, rule, regulation, order or restriction
of any domestic or foreign government or any instrumentality or agency thereof in respect of the conduct of its business or the
ownership of its properties, which violation of which would have a Material Adverse Effect.

 

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(vi)            Compliance
with Other Instruments. The Company is not in violation or default of any term of its certificate of incorporation or bylaws,
or of any provision of any mortgage, indenture or contract to which it is a party and by which it is bound or of any judgment,
decree, order or writ, other than such violation(s) that would not have a Material Adverse Effect. The execution, delivery
and performance of this Note will not result in any such violation or be in conflict with, or constitute, with or without the passage
of time and giving of notice, either a default under any such provision, instrument, judgment, decree, order or writ or an event
that results in the creation of any lien, charge or encumbrance upon any assets of the Company or the suspension, revocation, impairment,
forfeiture, or nonrenewal of any material permit, license, authorization or approval applicable to the Company, its business or
operations or any of its assets or properties. Without limiting the foregoing, the Company has obtained all waivers reasonably
necessary with respect to any preemptive rights, rights of first refusal or similar rights, including any notice or offering periods
provided for as part of any such rights, in order for the Company to consummate the transactions contemplated hereunder without
any third party obtaining any rights to cause the Company to offer or issue any securities of the Company as a result of the consummation
of the transactions contemplated hereunder.

 

(vii)            No
 “Bad Actor” Disqualification. The Company has exercised reasonable care to determine whether any Company
Covered Person (as defined below) is subject to any of the “bad actor” disqualifications described in
Rule 506(d)(1)(i) through (viii), as modified by Rules 506(d)(2) and (d)(3), under the Act
(“Disqualification Events”). To the Company’s knowledge, no Company Covered Person is subject
to a Disqualification Event. The Company has complied, to the extent required, with any disclosure obligations under
Rule 506(e) under the Act. For purposes of this Note, “Company Covered Persons” are those
persons specified in Rule 506(d)(1) under the Act; provided, however, that Company Covered Persons do not include
(a) any Holder, or (b) any person or entity that is deemed to be an affiliated issuer of the Company solely as a
result of the relationship between the Company and any Holder.

 

(viii)            Offering.
Assuming the accuracy of the representations and warranties of the Holder contained in subsection (b) below, the offer,
issue, and sale of this Note and the Conversion Securities (collectively, the “Securities”) are and will
be exempt from the registration and prospectus delivery requirements of the Act, and have been registered or qualified (or are
exempt from registration and qualification) under the registration, permit or qualification requirements of all applicable state
securities laws.

 

(b)            Representations
and Warranties of the Holder. The Holder hereby represents and warrants to the Company as of the date hereof as follows:

 

(i)            Purchase
for Own Account. The Holder is acquiring the Securities solely for the Holder’s own account and beneficial interest for
investment and not for sale or with a view to distribution of the Securities or any part thereof, has no present intention of selling
(in connection with a distribution or otherwise), granting any participation in, or otherwise distributing the same, and does not
presently have reason to anticipate a change in such intention.

 

(ii)            Information
and Sophistication. Without lessening or obviating the representations and warranties of the Company set forth in subsection
(a) above, the Holder hereby: (A) acknowledges that the Holder has received all the information the Holder has requested
from the Company and the Holder considers necessary or appropriate for deciding whether to acquire the Securities, (B) represents
that the Holder has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions
of the offering of the Securities and to obtain any additional information necessary to verify the accuracy of the information
given the Holder and (C) further represents that the Holder has such knowledge and experience in financial and business matters
that the Holder is capable of evaluating the merits and risk of this investment.

 

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(iii)            Ability
to Bear Economic Risk. The Holder acknowledges that investment in the Securities involves a high degree of risk, and represents
that the Holder is able, without materially impairing the Holder’s financial condition, to hold the Securities for an indefinite
period of time and to suffer a complete loss of the Holder’s investment.

 

(iv)            Further
Limitations on Disposition. Without in any way limiting the representations set forth above, the Holder further agrees not
to make any disposition of all or any portion of the Securities unless and until:

 

(1)            There
is then in effect a registration statement under the Act covering such proposed disposition and such disposition is made in accordance
with such registration statement; or

 

(2)            The
Holder shall have notified the Company of the proposed disposition and furnished the Company with a detailed statement of the circumstances
surrounding the proposed disposition, and if reasonably requested by the Company, the Holder shall have furnished the Company with
an opinion of counsel, reasonably satisfactory to the Company, that such disposition will not require registration under the Act
or any applicable state securities laws; provided that no such opinion shall be required for dispositions in compliance with Rule 144
under the Act, except in unusual circumstances.

 

(3)            Notwithstanding
the provisions of paragraphs (1) and (2) above, no such registration statement or opinion of counsel shall be necessary
for a transfer by the Holder to a partner (or retired partner) or member (or retired member) of the Holder in accordance with partnership
or limited liability company interests, or transfers by gift, will or intestate succession to any spouse or lineal descendants
or ancestors, if all transferees agree in writing to be subject to the terms hereof to the same extent as if they were the Holders
hereunder.

 

(v)            Accredited
Investor Status. The Holder is an “accredited investor” as such term is defined in Rule 501 under the Act.

 

(vi)            No
 “Bad Actor” Disqualification. The Holder represents and warrants that neither (A) the Holder nor (B) any
entity that controls the Holder or is under the control of, or under common control with, the Holder, is subject to any Disqualification
Event, except for Disqualification Events covered by Rule 506(d)(2)(ii) or (iii) or (d)(3) under the Act and
disclosed in writing in reasonable detail to the Company. The Holder represents that the Holder has exercised reasonable care to
determine the accuracy of the representation made by the Holder in this paragraph, and agrees to notify the Company if the Holder
becomes aware of any fact that makes the representation given by the Holder hereunder inaccurate.

 

(vii)            Foreign
Investors. If the Holder is not a United States person (as defined by Section 7701(a)(30) of the Internal Revenue Code
of 1986, as amended (the “Code”)), the Holder hereby represents that he, she or it has satisfied itself
as to the full observance of the laws of the Holder’s jurisdiction in connection with any invitation to subscribe for the
Securities or any use of this Note, including (A) the legal requirements within the Holder’s jurisdiction for the purchase
of the Securities, (B) any foreign exchange restrictions applicable to such purchase, (C) any governmental or other consents
that may need to be obtained, and (D) the income tax and other tax consequences, if any, that may be relevant to the purchase,
holding, redemption, sale or transfer of the Securities. The Holder’s subscription, payment for and continued beneficial
ownership of the Securities will not violate any applicable securities or other laws of the Holder’s jurisdiction.

 

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(viii)            Forward-Looking
Statements. With respect to any forecasts, projections of results and other forward-looking statements and information provided
to the Holder, the Holder acknowledges that such statements were prepared based upon assumptions deemed reasonable by the Company
at the time of preparation. There is no assurance that such statements will prove accurate, and the Company has no obligation to
update such statements.

 

5.            Events
of Default.

 

(a)            If
there shall be any Event of Default (as defined below) hereunder, at the option and upon the declaration of the Holder and upon
written notice to the Company (which election and notice shall not be required in the case of an Event of Default under subsection
(ii) or (iii) below), this Note shall accelerate and the Balance shall become due and payable within five (5) days
thereof (the “Drop Dead Date”). The occurrence of any one or more of the following shall constitute an
 “Event of Default”:

 

(i)            The
Company fails to pay timely any of the Balance on the date the same becomes due and payable and such failure continues for five
(5) days after written notice thereof is delivered to the Company;

 

(ii)            The
Company fails or neglects to perform, keep or observe any material term, provision, condition, covenant, or agreement contained
in this Note (including, without limitation, under Section 6), and to the extent such failure is capable of being cured, such
failure continues for ten (10) days after written notice thereof is delivered to the Company;

 

(iii)            The
Company files any petition or action for relief under any bankruptcy, reorganization, insolvency or moratorium law or any other
law for the relief of, or relating to, debtors, now or hereafter in effect, or makes any assignment for the benefit of creditors
or takes any corporate action in furtherance of any of the foregoing; or

 

(iv)            An
involuntary petition is filed against the Company (unless such petition is dismissed or discharged within 60 days under any bankruptcy
statute now or hereafter in effect, or a custodian, receiver, trustee or assignee for the benefit of creditors (or other similar
official) is appointed to take possession, custody or control of any property of the Company).

 

(b)            In
the event of any Event of Default hereunder, the Company shall pay all reasonable attorneys’ fees and court costs incurred
by the Holder in enforcing and collecting this Note following the Drop Dead Date.

 

6.            Security.

 

(a)            As
security for the payment and performance when due (whether at stated maturity, by acceleration, conversion or otherwise) of the
amounts due hereunder, the Company hereby grants, assigns, conveys, mortgages, pledges, hypothecates and transfers to Holder a
continuing first-ranking security interest in the Collateral; provided, however, that it is hereby agreed that Company
may, at its discretion, continue to manage and utilize its assets, and, for the avoidance of doubt, the aforementioned security
interest shall not trigger any consent requirements in respect of the Company’s corporate financing efforts, as long as the
first-ranking status of the aforementioned security interest is preserved. The Company hereby authorizes Holder to file a form
UCC-1 with the Secretary of State of the State of Delaware upon the execution of this Note.

 

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(b)            The
Company hereby represents and warrants to the Holder that (i) except for the interest of the Holder, the Company is the sole
owner of the Collateral free from any and all liens, security interests, encumbrances, claims, interests or restrictions of any
nature whatsoever (collectively, “Claims”), (ii) the security interest granted to the Holder pursuant
to this Note is, and shall at all times be, a valid, perfected, first priority security interest in the Collateral, and (iii) the
Company has the absolute right to pledge, sell, transfer and create a security interest in the Collateral, free and clear of any
and all Claims, other than those created by this Note.

 

(c)            The
Company hereby covenants and agrees with the Holder that so long as this Note remains in effect, (i) it will give written
notice to the Holder of any levy or attachment, execution or other process against the Collateral, and (b) at its own cost
and expense, it will take any and all actions reasonably necessary to defend the Collateral against the claims and demands of all
persons other than Holder and to defend the security interest of the Holder in the Collateral and the priority thereof against
any lien of any nature.

 

(d)            Each
party agrees that, from time to time, at its own expense, it will promptly execute and deliver all further instruments and documents,
and take all further action, that may be necessary or that may be reasonably required, in order to perfect, preserve and protect
any security interest granted or purported to be granted hereby or to enable such party to exercise and enforce his, her or its
rights and remedies hereunder.

 

(e)            So
long as this Note remains in effect, (i) the Company shall not transfer, assign or otherwise dispose of the Collateral without
the Holder’s prior written consent, except with respect to Collateral licensed, sold or used in the ordinary course of business,
and (ii) the Company shall not create, permit or suffer to exist any claim to or interest in or lien on encumbrance upon the
Collateral, other than any lien that does not alter or conflict with the first-ranking priority status of the security interest
granted in this Note.

 

(f)            Upon
the occurrence and subject to the continuation of an Event of Default, the Holder may, following the Drop Dead Date, at its
election, without notice of its election unless otherwise provided herein and without demand, do any one or more of the
following all of which are authorized by the Company: (i) make such payments and do such acts as the Holder considers
necessary or reasonable to protect its security interest in the Collateral; and (ii) exercise all rights and remedies of
a secured party under the Uniform Commercial Code as in effect from time to time in the State of New York (the
 “Code”).

 

(g)            The
Holder’s rights and remedies under this Note and all other agreements shall be cumulative. The Holder shall have all other
rights and remedies not inconsistent herewith as are provided by the Code, by any other law, or in equity. No exercise by the Holder
of one right or remedy shall be deemed an election, and no waiver by the Holder of any default on the Company’s part shall
be deemed a continuing waiver. No delay by the Holder shall constitute a waiver, election, or acquiescence by it.

 

(h)            The
Company hereby irrevocably nominates and appoints the Holder as its attorney-in-fact for the following purposes, following the
Drop Dead Date: (i) to do all acts and things which the Holder may deem necessary or advisable to perfect and continue perfected
the security interests created by this Note and, upon the occurrence and during the continuance of an Event of Default, to preserve,
process, develop, maintain and protect the Collateral; (ii) upon the occurrence and during the continuance of an Event of
Default, to do any and every act which any the Company is obligated to do under this Note, at the expense of the Company so obligated
and without any obligation to do so; (iii) to prepare, sign, file and/or record, for the Company, in the name of the Company,
any financing statement, application for registration, or like paper, and to take any other action deemed by the Holder necessary
or desirable in order to perfect or maintain perfected the security interests granted hereby; and (iv) upon the occurrence
and during the continuance of an Event of Default, to execute any and all papers and instruments and do all other things necessary
or desirable to preserve and protect the Collateral and to protect the Holder’s security interests therein; provided, however,
that the Holder shall be under no obligation whatsoever to take any of the foregoing actions, and, absent gross negligence, bad
faith or actual malice, the Holder shall have no liability or responsibility for any act taken or omission with respect thereto.

 

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7.            Rights
and Remedies. If an Event of Default occurs and solely to the extent it continues, Holder may, following the Drop
Dead Date, without notice or demand do any or all of the following: (i) accelerate and declare all of the Loans and
other Obligations to be immediately due and payable (but if an Event of Default described in Section 5(a)(ii) or
(iii) occurs, all Obligations are immediately due and payable without any action by Holder); (ii) stop advancing
money or extending credit for the Company’ benefit under this Agreement or any other agreement between the Company and
Holder; (iii) settle or adjust disputes and claims directly with account debtors for amounts, on terms and in any order
that Holder considers advisable; (iv) make any payments and do any acts it considers necessary or reasonable to protect
its security interest in the Collateral (and the Company will reasonably cooperate with Holder accordingly); (v) apply
to the amounts owing hereunder any balances and deposits of the Company that Holder holds or any amount held by Holder owing
to or for the credit or the account of the Company; (vi) increase the then-existing interest rate by an additional five
(5) percent per annum; (vii) ship, reclaim, recover, store, finish, maintain, repair, prepare for sale, advertise
for sale and sell or otherwise dispose the Collateral; (viii) deliver a notice of exclusive control, any entitlement
order, or other directions or instructions pursuant to any agreement providing control of any Collateral; and/or
(ix) exercise any other rights and remedies permitted by applicable law. Effective only when an Event of Default occurs
and solely to the extent it continues, the Company irrevocably appoints Holder as its lawful attorney to, following the Drop
Dead Date: (a) endorse the Company's name on any checks or other forms of payment or security; (b) sign the
Company's name on any invoice or bill of lading for any account or drafts against account debtors; (c) make, settle, and
adjust all claims related to the Company’s insurance policies; (d) settle and adjust disputes and claims for
amounts and on terms Holder determines reasonable; and (e) transfer the Collateral into the name of Holder or a third
party as the UCC permits. Effective only when an Event of Default occurs and solely to the extent it continues, Holder may
exercise the power of attorney to sign the Company’s name on any documents necessary to perfect or continue the
perfection of any security interest. Holder’s appointment as the Company’s attorney in fact, and all of
Holder’s rights and powers, coupled with an interest, are irrevocable until all amounts owing hereunder have been fully
repaid. All of Holder’s rights and remedies under this Agreement or any other agreement between Holder and the Company
are cumulative. The Company waives demand, notice of default or dishonor, notice of payment and nonpayment, notice of any
default, nonpayment at maturity, release, compromise, settlement, extension, or renewal of accounts, documents, instruments,
chattel paper, and guarantees held by Holder on which the Company is liable.

 

8.            Miscellaneous
Provisions.

 

(a)            Waivers.
The Company hereby waives demand, notice, presentment, protest and notice of dishonor.

 

(b)            Further
Assurances. The Holder agrees and covenants that at any time and from time to time the Holder will promptly execute and deliver
to the Company such further instruments and documents and take such further action as the Company may reasonably require in order
to carry out the full intent and purpose of this Note and to comply with state or federal securities laws or other regulatory approvals.

 

(c)            Transfers
of Note. This Note may be transferred only upon its surrender to the Company for registration of transfer, duly endorsed, or
accompanied by a duly executed written instrument of transfer in form satisfactory to the Company. Thereupon, this Note shall be
reissued to, and registered in the name of, the transferee, or a new Note for like principal amount and interest shall be issued
to, and registered in the name of, the transferee. Interest and principal shall be paid solely to the registered holder of this
Note. Such payment shall constitute full discharge of the Company’s obligation to pay such interest and principal.

 

    9

     

    

 

(d)            Market
Standoff. To the extent requested by the Company or an underwriter of securities of the Company, the Holder and any permitted
transferee thereof shall not, without the prior written consent of the managing underwriters in the IPO (as hereafter defined),
offer, sell, make any short sale of, grant or sell any option for the purchase of, lend, pledge, otherwise transfer or dispose
of (directly or indirectly), enter into any swap or other arrangement that transfers to another, in whole or in part, any of the
economic consequences of ownership (whether any such transaction is described above or is to be settled by delivery of Securities
or other securities, in cash, or otherwise), any Securities or other shares of stock of the Company then owned by the Holder or
any transferee thereof, or enter into an agreement to do any of the foregoing, for up to 180 days following the effective date
of the registration statement of the initial public offering of the Company (the “IPO”) filed under the
Securities Act. For purposes of this paragraph, “Company” includes any wholly owned subsidiary of the
Company into which the Company merges or consolidates. The Company may place restrictive legends on the certificates representing
the shares subject to this paragraph and may impose stop transfer instructions with respect to the Securities and such other shares
of stock of the Holder and any transferee thereof (and the shares or securities of every other person subject to the foregoing
restriction) until the end of such period. The Holder and any transferee thereof shall enter into any agreement reasonably required
by the underwriters to the IPO to implement the foregoing within any reasonable timeframe so requested. The underwriters for any
IPO are intended third party beneficiaries of this paragraph and shall have the right, power and authority to enforce the provisions
of this paragraph as though they were parties hereto.

 

(e)            Amendment
and Waiver. Any term of this Note may be amended or waived with the written consent of the Company and the Holder.

 

(f)            Governing
Law; Exclusive Jurisdiction. This Note shall be governed by and construed under the laws of the State of New York, as applied
to agreements among New York residents, made and to be performed entirely within the State of New York, without giving effect to
conflicts of laws principles. Any dispute in respect of this Note shall be subject to the exclusive jurisdiction of the competent
state and federal courts located within New York, NY.

 

(g)            Binding
Agreement. The terms and conditions of this Note shall inure to the benefit of and be binding upon the respective successors
and assigns of the parties. Nothing in this Note, expressed or implied, is intended to confer upon any third party any rights,
remedies, obligations or liabilities under or by reason of this Note, except as expressly provided in this Note.

 

(h)            Counterparts;
Manner of Delivery. This Note may be executed in two or more counterparts, each of which shall be deemed an original, but all
of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including
pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act or other
applicable law) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered
and be valid and effective for all purposes.

 

(i)            Titles
and Subtitles. The titles and subtitles used in this Note are used for convenience only and are not to be considered in construing
or interpreting this Note.

 

    10

     

    

 

(j)            Notices.
All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (i) upon personal delivery
to the party to be notified, (ii) when sent by confirmed electronic mail or facsimile if sent during normal business hours
of the recipient, if not, then on the next business day, (iii) five (5) days after having been sent by registered or
certified mail, return receipt requested, postage prepaid, or (iv) one day after deposit with a nationally recognized overnight
courier, specifying next day delivery, with written verification of receipt. All communications to a party shall be sent to the
party’s address set forth on the signature page hereto or in this subsection or at such other address(es) as such party
may designate by ten (10) days’ advance written notice to the other party hereto. All communications to the Company
shall be sent to CITTA, Inc. 1185 Avenue of the Americas, Suite 301, New York, NY, Attention: President, electronic mail:
egonzalez@marpaihealth.com, with a copy (which shall not constitute notice) to Pearl Cohen Zedek Latzer Baratz L.L.P., 50 Congress
Street, Suite 1040, Boston, MA 02109, Attention: Oded Kadosh, electronic mail: okadosh@pearlcohen.com.

 

(k)            Expenses.
The Company and the Holder shall each bear its respective expenses and legal fees incurred with respect to the negotiation, execution
and delivery of this Note and the transactions contemplated herein.

 

(l)            Delays
or Omissions. It is agreed that no delay or omission to exercise any right, power or remedy accruing to the Holder, upon any
breach or default of the Company under this Note shall impair any such right, power or remedy, nor shall it be construed to be
a waiver of any such breach or default, or any acquiescence therein, or of or in any similar breach or default thereafter occurring;
nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter
occurring. It is further agreed that any waiver, permit, consent or approval of any kind or character by the Holder of any breach
or default under this Note, or any waiver by the Holder of any provisions or conditions of this Note, must be in writing and shall
be effective only to the extent specifically set forth in writing and that all remedies, either under this Note, or by law or otherwise
afforded to the Holder, shall be cumulative and not alternative. This Note shall be void and of no force or effect in the event
that the Holder fails to remit the full principal amount to the Company within five (5) calendar days of the date of this
Note.

 

(m)            Right
of Offset. The Parties agree that the Balance shall be subject to set-off and reduction by the Company pursuant to the provisions
of Section 7.06 of the APA.

 

(n)            Entire
Agreement. This Note constitutes the full and entire understanding and agreement between the parties with regard to the subjects
hereof, and no party shall be liable or bound to any other party in any manner by any representations, warranties, covenants and
agreements except as specifically set forth herein.

 

(o)            Exculpation
among Holders. The Holder acknowledges that the Holder is not relying on any person, firm or corporation, other than the Company
and its officers and Board members, in making its investment or decision to invest in the Company.

 

(p)            Broker’s
Fees. Each party hereto represents and warrants that no agent, broker, investment banker, person or firm acting on behalf
of or under the authority of such party hereto is or will be entitled to any broker’s or finder’s fee or any
other commission directly or indirectly in connection with the transactions contemplated herein. Each party hereto further
agrees to indemnify each other party for any claims, losses or expenses incurred by such other party as a result of the
representation in this subsection being untrue.

 

(q)            Costs
of Collection. The Company agrees to pay all of the Holder’s reasonable costs of collection, including, without limitation,
reasonable attorneys’ fees, whether or not suit is filed, and all reasonable costs of suit and preparation for suit (whether
at trial or appellate level), in the event any payment of principal, interest or other amount is not paid when due and constitutes
an Event of Default.

 

[Signature page follows]

 

    11

     

    

 

The parties have executed this Secured
Convertible Promissory Note as of the Effective Date.

 

	 	COMPANY:
	 	 
	
         

         

         
	CITTA, Inc. 
	 	By:	/s/ Edmundo Gonzalez
	 	 	Name:   	Edmundo Gonzalez
	 	 	Title:	CEO
	 	 	 
	 	E-mail:	egonzalez@marpaihealth.com
	 	 
	 	Address:	
        1185 Avenue of
        the Americas, Suite 301

        New York,
NY 10036

 

	 	HOLDER:
	 	 
	Name of Holder:	SQN Venture Income Fund, L.P.
	 	 
	 	By:	/s/ Ryan McCalley
	 	 	Name:	Ryan McCalley
	 	 	Title:	Managing Partner
	 	 
	 	E-mail:	rmccalley@sqnvp.com
	 	 
	 	Address:	100 Arboretum Dr. Suite 105
	 	 	Portsmouth, NH  03801-7833
	 	 	 

 

    12Exhibit
4.9

 

NOTE PURCHASE AGREEMENT

 

THIS NOTE PURCHASE
AGREEMENT (the “Purchase Agreement”) is dated as of September 16, 2019, by and among CITTA, Inc., a Delaware
corporation (the “Company”), and those individuals and/or entities listed in Exhibit A attached
hereto (each a “Lender” and together the “Lenders”).

 

WHEREAS, the Company
desires to raise up to two million dollars (US$2,000,000.00) (the “Loan Amount”) via a convertible note financing
from the Lenders and the Lenders wish to loan the Company the Loan Amount subject to the terms and conditions of this Purchase
Agreement and the convertible promissory note attached hereto as Exhibit B (each a “Note” and together
the “Notes”);

 

NOW, THEREFORE, in
consideration of the premises and the mutual covenants herein contained, and other good and valuable consideration the receipt
and sufficiency of which is hereby acknowledged, the undersigned parties hereby agree as follows:

 

1.                   Amount
and Terms of the Notes. The Lenders undertake to lend to the Company the Loan Amount, in the proportions as set forth opposite
each Lender’s name in Exhibit A, against the issuance of the Notes. The Loan Amount shall bear a cumulative annual
interest as specified in the Note and shall have such maturity date set forth therein.

 

2.                   Closing.

 

(a)                Initial
Closing. Subject to the terms and conditions of this Purchase Agreement, the initial closing of the sale and purchase of the
Notes hereunder shall take place remotely via the exchange of documents and signatures on such date and time as determined by
the Company (the “Initial Closing”). At the Initial Closing, the Company shall deliver a Note to each Lender
participating therein in the original principal amount set forth opposite each Lender’s name in Exhibit A and each
Lender shall immediately pay its respective portion of the Loan Amount as set forth opposite each Lender’s Name in Exhibit
A by way of check or wire transfer pursuant to the instructions provided by the Company to the Lenders prior to the Initial
Closing.

 

(b)                Additional
Closings. Following the Initial Closing, at any time and from time to time during and up to one hundred twenty (120) days
following the Initial Closing (the “Additional Closing Period”), the Company may, at one or more additional
closings as determined by the Company (each an “Additional Closing” and together with the Initial Closing,
a “Closing”), without obtaining the signature, consent or permission of any of the Lenders in the Initial Closing
or any prior Additional Closing, issue additional Notes to other investors (the “New Lenders”) up to the portion
of the Loan Amount remaining after the Initial Closing on the same terms and conditions as set forth herein. The New Lenders may
include persons or entities who are already Lenders under this Purchase Agreement and each New Lender shall execute and deliver
a signature page to this Purchase Agreement and the Note to the Company, becoming a party to, and bound by, this Agreement to
the same extent as if the New Lender had been a Lender at the Initial Closing and each such New Lender shall be deemed to be a
Lender for purposes under this Agreement as of the date of the applicable Additional Closing. The Company, in its sole discretion,
may shorten the Additional Closing Period.

 

3.                  
Representations and Warranties of the Company. The Company represents and warrants to the Lenders as follows:

 

(a)                The Company is duly organized and existing in good standing under the laws of State of Delaware, and has the power to own its properties
and to carry on its business as now conducted.

 

(b)                The Company has full power, authority and legal right to enter into this Purchase Agreement and each Note and to perform all
of its obligations thereunder. The Company has duly executed and delivered this Purchase Agreement and each Note. This
Purchase Agreement and the Note constitute the legal, valid, and binding obligation of the Company enforceable in accordance
with their respective terms.

 

(c)                All of the shares of the Company to be issued to the Lender upon the conversion of each Note (if converted) shall be, when issued,
duly authorized, validly issued, fully paid, non-assessable free and clear of all liens, pledges, security interests, charges and
encumbrances and registered in the name of the Lender on the stock ledger of the Company.

 

     

     

    

 

4.                  
Representations and Warranties of the Lender. Each Lender represents and warrants to the Company that:

 

(a)                The Lender has sufficient knowledge and experience in investing in companies similar to the Company in terms of the Company’s
stage of development so as to be able to evaluate the risks and merits of its investment in the Company and it is able financially
to bear the risks thereof;

 

(b)               The Lender is entering into this Purchase Agreement and acquiring the Note for the Lender’s own account for the purpose of
investment and not with a view to or for sale in connection with any distribution thereof other than in compliance with the Securities
Act and applicable state securities laws; and

 

5.                  
Each Lender understands that (i) each Note has not been registered under the Securities Act by reason of its issuance in
a transaction exempt from the registration requirements of the Securities Act pursuant to Section 4(2) thereof or Rule 504, 505
or 506 promulgated under the Securities Act, (ii) each Note must be held indefinitely unless a subsequent disposition thereof is
registered under the Securities Act or is exempt from such registration, and (iii) each Note will bear a legend substantially to
such effect.

 

6.                  
Conversion. The Notes shall be convertible pursuant to the terms contained therein.

 

7.                  
Miscellaneous.

 

7.1              
Entire Purchase Agreement. This Purchase Agreement constitutes the entire understanding of the parties hereto with
respect to the subject matter hereof and supersedes all prior written and oral understandings of such parties with regard thereto.
This Purchase Agreement and the attached Note may be modified, amended, or any term hereof waived with the written consent of the
Company and a majority in interest of the Lenders. Any amendment effected in accordance with this Section 7.1 shall be binding
upon all parties of this Purchase Agreement and their respective successors and assignees.

 

7.2              
Governing Law; Jurisdiction. This Purchase Agreement shall be governed by and construed according to the laws of
the State of New York without regard to the conflict of laws provisions thereof. Any dispute arising under or in relation to this
Purchase Agreement shall be resolved in the competent courts of the State of New York, and each of the parties hereby submits irrevocably
to the jurisdiction of such court.

 

7.3               Notices. All notices or other communications hereunder shall be in writing and shall be given in person, by registered
mail (registered air mail if mailed internationally), by an overnight courier service which obtains a receipt to evidence delivery,
or by facsimile transmission (provided that written confirmation of receipt is provided), addressed as set forth below:

 

If to the Company:            CITTA, Inc.

1185 Avenue of the Americas, Suite
301

New York, NY 10036

Attn: Edmundo Gonzalez, Secretary

 

     

     

    

 

With a copy to:

Pearl Cohen Zedek Latzer
LLP

50 Congress Street, Suite 1040

Boston, MA 02109

Fax: (617) 228-5720

Attn: Oded Kadosh, Esq.

 

If to the Lender:                 to the address
as set forth in Exhibit A

 

or such other address
as any party may designate to the other in accordance with the aforesaid procedure. All notices and other communications delivered
in person or by courier service shall be deemed to have been given as of one business day after sending thereof, those given by
facsimile transmission with confirmed answer back (provided that such date is a business day in the country of receipt and if not,
the next business day) and all notices and other communications sent by registered mail shall be deemed given ten (10) days after
posting.

 

7.4               Assignment. This Purchase Agreement may not be assigned by any Lender without the prior written consent of the Company.
The Company may assign this Purchase Agreement without the prior written consent of the Lenders. Notwithstanding the foregoing,
this Purchase Agreement shall be binding upon the successors, assigns and representatives of each party.

 

7.5               No
Waiver. No delay or omission to exercise any right, power, or remedy accruing to any party upon any breach or default under
this Purchase Agreement, shall be deemed a waiver of any other breach or default theretofore or thereafter occurring. All remedies,
either under this Purchase Agreement or by law or otherwise afforded to any of the parties, shall be cumulative and not alternative.

 

7.6               Severability.
If any provision of this Purchase Agreement is held by a court of competent jurisdiction to be unenforceable under applicable
law, then such provision shall be excluded from this Purchase Agreement and the remainder of this Purchase Agreement shall be
interpreted as if such provision were so excluded and shall be enforceable in accordance with its terms; provided, however, that
in such event this Purchase Agreement shall be interpreted so as to give effect, to the greatest extent consistent with and permitted
by applicable law, to the meaning and intention of the excluded provision as determined by such court of competent jurisdiction.

 

7.7               Counterparts.
This Purchase Agreement may be executed in any number of counterparts, each of which shall be deemed an original but all of which
together shall constitute one and the same instrument.

 

7.8               Further
Assurances. Each of the parties hereto shall perform such further acts and execute such further documents as may reasonably
be necessary to carry out and give full effect to the provisions of this Purchase Agreement and the intentions of the parties
as reflected thereby.

 

7.9               Headings.
All article and section headings herein are inserted for convenience only and shall not modify or affect the construction or interpretation
of any provision of this Purchase Agreement.

 

7.10             Expenses.
Each Lender will bear its own fees and expenses incurred in the transactions contemplated herein.

 

     

     

    

 

IN WITNESS WHEREOF, the
parties have executed this Note Purchase Agreement as of the date first above written.

 

	THE COMPANY:	 
	 	 	 
	CITTA, INC.	 
	 	 	 
	By:	 /s/ Edmundo Gonzalez	 
	 	 	 
	Name: 	Edmundo Gonzalez	 
	 	 	 
	Title:	President & Secretary	 
	 	 	 

 

[Company signature page to the Purchase
Agreement of CITTA, Inc.]

 

     

     

    

 

IN WITNESS WHEREOF, the
parties have executed this Note Purchase Agreement as of the date first above written.

 

	THE LENDER:
	 	 	 
	Pishinano Holdings Co. Limited.
	 	 	 
	By:	/s/ Kyriakos Kyriakou, Chrystalla Jiallourou	 
	 	 	 
	Name: 	Kyriakos Kyriakou, Chrystalla Jiallourou	 
	 	 	 
	Title:	Directors	 

 

[Lender signature page to the Purchase
Agreement of CITTA, Inc.]

 

     

     

    

 

Exhibit A

 

Lenders (As of September 16, 2019)

 

	Name	Address	Loan Amount
	HILLCOUR INVESTMENT FUND, LLC	
        One Urban Centre, Suite, 100

        4830 W. Kennedy Blvd., Tampa, Fl. 33609
	$1,000,000.00
	Weatherford Holdings, LLC	100 N Tampa Street, Suite 2320, Tampa, FL 33602	$100,000.00
	Pishinano Holdings Co. Limited.	 	$200,000.00
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	TOTAL:	 	$1,300,000.00

 

     

     

    

 

Exhibit B

 

THIS NOTE AND THE SECURITIES
ISSUABLE UPON THE CONVERSION HEREOF HAVE NOT BEEN REGISTERED, INCLUDING UNDER THE SECURITIES ACT OF 1933. THEY MAY NOT BE SOLD,
OFFERED FOR SALE, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT (1) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT,
AND (2) SUBJECT TO THE PROVISIONS OF ANY OTHER APPLICABLE LAW AND OF THE THEN CURRENT BY-LAWS AND CERTIFICATE OF INCORPORATION
OF THE COMPANY.

 

CONVERTIBLE PROMISSORY NOTE

 

	$200,000 (the “Loan Amount”)	September 16, 2019
	8% Annual Interest	(the “Note Date”)

 

THIS NOTE is issued
pursuant to the terms of that certain Note Purchase Agreement by and among CITTA, Inc. (the “Company”) and Pishinano
Holdings Co. Limited (the “Lender”) and dated September 16, 2019 (the “Purchase Agreement”).
Capitalized terms not elsewhere defined herein shall have the meanings set forth in the Purchase Agreement.

 

FOR VALUE RECEIVED,
the Company hereby promises to pay to the order of the Lender, the principal sum of the Loan Amount, together with interest thereon.
This Note shall bear a simple interest rate of eight percent (8%) per annum based on a 365 day year. The obligation to pay interest
on this Note shall be cumulative.

 

1.                  
Maturity Date. If not otherwise converted pursuant to Section 3, the outstanding principal balance and unpaid accrued
interest on this Note shall be due two (2) years from the Note Date (the “Maturity Date”) or prior thereto upon
the Lender’s first written request following an Event of Default of the Company. The Maturity Date may be extended upon mutual
consent of the Company and the Lender.

 

2.                  
Note Repayment. All repayments shall be made in lawful money of the United States of America by wire transfer to
a bank account to be designated by the Lender. All Notes outstanding under the Purchase Agreement shall rank equally without preference
or priority of any kind with respect to one another, and all payments with respect to any of the Notes that have not been converted
shall be applied ratably in proportion to the Loan Amounts represented thereby. The Company shall be entitled to repay all or any
portion of the principal or accrued interest outstanding under the Notes upon prior written notice to the Lender.

 

3.                  
Conversion.

 

3.1               Automatic
Conversion upon Qualified Financing. Notwithstanding the foregoing, at the closing of the Qualified Financing (as
hereinafter defined), the outstanding principal balance and unpaid accrued interest on this Note shall be automatically
converted into the most senior class of shares of the Company issued in such Qualified Financing (the
 “Shares”) at a price per share equal to the lower of: (i) 80% of the original price per unit of such
Shares or (ii) a maximum company pre-money valuation of eight million dollars (US$8,000,000) on a fully diluted basis (in
each case, the “Conversion Price”). The exact number of Shares to be issued to Lender upon conversion will
be equal to the aggregate outstanding principal and unpaid accrued interest due on this Note, divided by the Exercise Price.
The issuance of such shares upon conversion of this Note shall be contingent upon execution and delivery by the Lender of the
agreements executed and delivered by investors in the Qualified Financing. The Lender shall thereupon receive all of the
rights, preferences and privileges granted to other investors in the Qualified Financing, including but not limited to any
registration and piggyback rights. “Qualified Financing” shall mean the next transaction or series of
related transactions following the date of the Purchase Agreement in which the Company issues and sells Shares to investors,
which may be existing stockholders of the Company, with gross proceeds to the Company of at least two
million dollars (US$2,000,000), excluding the conversion of Notes. 

 

     

     

    

 

 

3.2               Discretionary
Conversion. Unless otherwise automatically converted in a Qualified Financing, at any time prior to the Maturity Date (or
any time after the Maturity Date with the consent of the Company and including prior to a Change of Control that occurs before
a Qualified Financing) the Lender shall be entitled, by written notice to the Company, to convert the outstanding principal balance
and unpaid accrued interest on this Note, in whole or in part, into the most senior class of stock of the Company then outstanding,
at a conversion price based upon a maximum company pre-money valuation of eight million dollars (US$8,000,000) on a fully diluted
basis. The shares issued upon said conversion shall have all preferential and associated rights with said class and given to the
investors in the applicable round of financing, and shall be identical in all terms except for said price. Any election to convert
the Note pursuant to this Section 3.2 will be made in writing and delivered to the Company.

 

3.3               Repayment Upon Change of Control. In the event the Company consummates a Change of Control (as defined below) prior
to the Maturity Date and prior to the conversion or repayment of this Note, then this Note shall become due and payable upon the
date of consummation of such Change of Control (and following the Company’s receipt of proceeds from a Change of Control)
in an amount equal to the greater of: (i) one and one half times (1.5x) the Loan Amount, plus any accrued and unpaid interest;
or (ii) the net proceeds to be received by Lender if Lender had converted this Note based on a price per share based on a pre-money
valuation of the Company equal to $8,000,000, as calculated on a fully diluted basis, immediately prior to the Change of Control.
The Company will notify Lender in writing of a Change of Control at least five (5) days before the anticipated closing of such
Change of Control. A “Change of Control” means the sale, conveyance, exclusive license outside of the ordinary
course of business, or other disposition of all or substantially all of the Company’s property or business, the Company’s
merger with or into or consolidation with any other corporation, limited liability company or other entity (other than a wholly
owned subsidiary of the Company) or the sale or disposition of a majority of the voting securities of the Company; provided that
the term “Change of Control” shall not include (a) a merger or reorganization of the Company effected exclusively for
the purpose of changing the domicile of the Company or tax-free reorganization, (b) an equity financing in which the Company is
the surviving corporation, or (c) a transaction in which the stockholders of the Company immediately prior to the transaction own
50% or more of the voting or economic power of the surviving corporation immediately following the transaction in substantially
the same proportions as existed immediately prior to the transaction.

 

4.                   Unsecured
Obligation. The Lender hereby acknowledges and agrees that the obligations of the Company hereunder (including, without limitation,
in respect of repayment of the Loan Amount and the accrued but unpaid interest thereon) shall be an unsecured obligation of the
Company in all respects.

 

5.                  
Governing Law; Venue. This Note and all acts and transactions pursuant hereto and the rights and obligations of the
parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of New York without regard
to the conflict of law provisions. The competent courts of the State of New York shall have exclusive jurisdiction to resolve all
disputes arising from or in connection with this Note or the Purchase Agreement.

 

6.                   Transfer;
Successors and Assigns. The Lender may not sell, assign, pledge, dispose of or otherwise transfer (collectively, “Transfer”)
this Note, unless the Lender obtains the Company’s prior written approval (such approval to be provided in the Company’s
sole and absolute discretion).

 

     

     

    

 

7.                  
Notices. The notice provision of the Purchase Agreement shall apply to this Note.

 

8.                  
Amendments, Modifications. Any amendment or modification of this Note shall require the prior written consent of
the Company and the Lender.

 

9.                  
Miscellaneous. The Company hereby expressly waives presentment, demand for payment, dishonor, notice of dishonor,
protest, notice of protest and any other formality.

 

10.                 Stock
Reclassifications; Stock Splits, Combinations and Dividends. If the Shares issuable upon the conversion of this Note shall
be changed into the same or different number of Shares of any class or classes of stock, whether by reclassification, stock split,
stock dividend, or similar event, then and in each such event, the Lender, shall have the right thereafter to convert all or any
portion of this Note into the kind and amount of Shares and property receivable upon such capital reorganization, reclassification
or other change which the Lender would have received had this Note been converted immediately prior to such capital reorganization,
reclassification or other change.

 

11.                Adjustments.
The Company will make an appropriate adjustment to the number of Shares issuable upon conversion and/or the Conversion Price thereof
upon any stock split, combination, dividend, distribution, recapitalization, reorganization, or similar event affecting the Company’s
capital stock other than cash dividends paid or payable from retained earnings (collectively, a "Stock Event"),
so that the Lender will receive, upon conversion, all Shares, dividends, rights and benefits to which the Lender would have been
entitled had Lender converted this Note prior to such Stock Event. The form of this Note need not be changed by reason of any
such adjustment. Any successor entity to the Company will execute and deliver to the Lender a supplement hereto acknowledging
such entity's obligations under this Note. The Company will make adjustments as soon as practicable following any Stock Event,
and immediately thereafter give notice to the Lender of all facts and calculations associated with such adjustment. Stock Event
adjustments may be waived by the Lender, in its sole and absolute discretion.

 

12.                Default.
If there shall be any Event of Default (as defined below) hereunder, at the option and upon the declaration of the Lender of this
Note and upon written notice to the Company (which election and notice shall not be required in the case of an Event of Default
under Section 12(b) or 12(c)), this Note shall accelerate and all Loan Amount and unpaid accrued interest shall become due, payable
and collectible. The occurrence of any one or more of the following shall constitute an “Event of Default”
hereunder:

 

(a)            
The Company fails to pay timely any of the Loan Amount due under this Note on the date the same becomes due and payable
or any accrued interest or other amounts due under this Note on the date the same becomes due and payable or within five (5) business
days thereafter;

 

(b)            
The Company files any petition or action for relief under any bankruptcy, reorganization, insolvency or moratorium law or
any other law for the relief of, or relating to, debtors, now or hereafter in effect, or makes any assignment for the benefit of
creditors or takes any corporate action in furtherance of any of the foregoing; or

 

(c)            
An involuntary petition is filed against the Company (unless such petition is dismissed or discharged within sixty (60)
days) under any bankruptcy statute now or hereafter in effect, or a custodian, receiver, trustee, assignee for the benefit of
creditors (or other similar official) is appointed to take possession, custody or control of any property of the Company and is
not removed within sixty (60) days from the date of such appointment.

 

     

     

    

 

		14.	     Default Remedies.
	 	 	 

(a)              If
an Event of Default (other than an insolvency Event of Default) has occurred and is continuing, the Lender, by notice to the Company,
may declare the Loan Amount of this Note and all accrued interest thereon to be immediately due and payable, and upon any such
declaration, such Loan Amount and accrued interest shall thereupon become due and payable immediately within five (5) business
days from the Lender’s written request. In the event the Company fails to pay all outstanding Amounts within this five (5)
business day period, the interest rate on the unpaid and outstanding Loan Amount of this Note shall be increased to, and this
Note shall bear interest at, a monthly rate equal to one and a half percent (1.5%) or to the maximum rate permitted by law (the
 "Default Rate") from the expiration of the five (5) business day period until such unpaid and outstanding Loan
Amount of this Note is repaid in full. If an insolvency Event of Default has occurred, the Loan Amount of this Note and accrued
Interest thereon will become immediately due and payable without any declaration or any act on the part of any Lender. Such declaration
of acceleration may be rescinded and past defaults may be waived by the Lender.

 

(b)             No course
of dealing or delay or failure on the part of the Lender to exercise any right under this Section shall operate as a waiver of
such right or otherwise prejudice the Lender’s rights, powers and remedies. The Company will pay or reimburse the Lender,
to the extent permitted by law, for all reasonable costs and expenses, including but not limited to reasonable attorneys’
fees, incurred by the Lender in collecting any sums due on this Note or in otherwise enforcing any of the Lender's rights hereunder.

 

(c)              No right
or remedy herein conferred upon the Lender is intended to be exclusive of any other right or remedy contained herein or existing
at law, in equity, by statute or otherwise, and every such right or remedy shall be cumulative and shall be in addition to every
other such right or remedy contained herein and therein or now or hereafter existing at law, in equity, by statute or otherwise.

 

15.                Indemnity.
The Company agrees to indemnify and hold the Lender harmless from and against any and all suits, actions, proceedings, claims,
damages, losses, liabilities and expenses of any kind and nature whatsoever (including attorneys' fees and disbursements and other
costs of investigation or defense) that may be instituted or asserted against or incurred by the Lender as the result of credit
having been extended, suspended or terminated under this Note or with respect to the execution, delivery, enforcement, performance
and administration of, or in any other way arising out of or relating to, this Note or the transactions referred to herein and
any actions or omissions with respect to any of the foregoing, except to the extent that the Lender is finally determined by a
court of competent jurisdiction to have resulted solely from the gross negligence or willful misconduct of the Lender.

 

16.                Replacement
of Note. If the Lender of record loses this Note, the Company shall issue an identical replacement Note to the Lender upon
the Lender’s delivery to the Company of an executed lost note affidavit stating the facts surrounding such loss of this Note
and an executed indemnity agreement indemnifying and holding harmless the Company against any losses incurred or liabilities suffered
by the Company or claims against the Company by any other holders or transferees of this Note related to or from the issuance of
the replacement Note by the Company, which lost note affidavit and indemnity agreement shall be in a form reasonably satisfactory
to the Company.

 

17.                Reinstatement.
This Note shall continue to be effective, or be reinstated, as applicable, if at any time payment of all or any part hereof
is rescinded or must otherwise be returned or restored by the Lender upon the insolvency, bankruptcy, dissolution,
liquidation or reorganization of the Company, as though such payments had not been made.

 

     

     

    

 

18.                Additional
Covenants. Until this Note is paid in full, the Company shall not without the prior written consent of the Lender (such consent
which shall not be unreasonably delayed, withheld, or conditioned): (i) issue any securities other than strictly pursuant to a
Qualified Financing or pursuant to a duly adopted Stock Incentive Plan; (ii) incur or agree to incur any indebtedness that is senior
to this Note (except for the SQN Note as hereinafter defined) ; (iii) make any loans to, or assume or guarantee any debt or other
obligations of another person or entity in excess of $10,000; (iv) enter into or modify any affiliated party transaction or pay
current officers and directors in excess of that which has previously been disclosed in writing to the Lender; (v) place any liens
or encumbrances on, or cause any liens or encumbrances to be placed on, or transfer, convey, assign, pledge or grant any security
interests in, the capital stock or assets or properties of the Company other than those liens that may be granted to SQN under
the SQN Note; or (vi) declare or pay any dividends or distributions on its capital stock until this Note is paid in full.

 

19.                Financial
Statements. So long as this Note is outstanding, the Company shall furnish to the Lender:

 

(a)         Monthly
Reports. Within thirty (30) days following the end of each fiscal month of the Company, a copy of the consolidated and consolidating
balance sheet, income statement and statement of cash flow (the "Financial Statements") of the Company and its
subsidiaries, internally prepared for such fiscal month in accordance with generally accepted accounting principles in the United
States, consistently applied, setting forth in comparative form the corresponding figures for that date and period, accompanied
by a certificate executed by the Chief Executive Officer or Chief Financial Offer of the Company certifying that (i) such Financial
Statements are complete, true and correct and (ii) to his or her actual knowledge, the Company is not in default of any of its
covenants made hereunder.

 

(b)         Annual
Reports. Within ninety (90) days following the close of each fiscal year of the Company, the Financial Statements for such
fiscal year certified by an officer of the Company without qualification in reasonable detail, setting forth in comparative form
the corresponding figures for the corresponding date and period in the preceding fiscal year, and accompanied by other detailed
reports from such accountants to the Company (including, without limitation, any management letters) in connection with each annual
or interim audit or review of the books of the Company by such accountants. In the event the Board of Directors of the Company
approves the annual Financial Statements to be audited, the Lender shall be provided with Financial Statements audited by an independent
certified public accounting firm reasonably acceptable to the Lender.

 

20.                Seniority.
The Lender hereby confirms and acknowledges that this Note shall rank pari passu in seniority with any other Note issued under
the Purchase Agreement. The Lender further confirms and acknowledges that this Note shall rank junior in all respects (including
in respect of payment) to that certain promissory note that may be issued by the Company to SQN Venture Income Fund, L.P., or an
affiliate thereof (“SQN”) in the aggregate amount of up to $3,000,000 (the “SQN Note”) in
respect of the Company purchasing certain assets of SQN (the “SQN Transaction”). Nothing herein shall obligate
the Company to consummate the SQN Transaction or issue the SQN Note but in the event the SQN Transaction is consummated, and the
SQN Note is issued by the Company in connection therewith, the SQN Note, and any lien granted to SQN thereunder, shall be deemed
senior and first ranking in all respects to this Note. The Lender hereby consents to the SQN Transaction and the senior SQN Note
and undertakes to execute any document, or take any action, reasonably requested by the Company or SQN to subordinate this Note
to the SQN Note.

 

     

     

    

 

[Remainder of Page
Intentionally Left Blank]

 

IN WITNESS WHEREOF, the
Company has executed this Note as of the date first above written.

 

	 	THE COMPANY:
	 	 	 
	 	CITTA, INC.
	 	 	 
	 	By: 	/s/ Edmundo Gonzalez
	 	 	 
	 	Name:  	Edmundo Gonzalez
	 	 	 
	 	Title:	President & Secretary

 

	Approved and Agreed:	 
	 	 	 
	THE LENDER:
	 	 	 
	Pishinano Holdings Co. Limited.	 	 

 

	By:	/s/ Kyriakos Kyriakou, Chrystalla Jiallourou	 
	 	 	 
	Name:  	Kyriakos Kyriakou, Chrystalla Jiallourou	 
	 	 	 
	Title: 	Directors	 

 

[SIGNATURE PAGE TO CONVERTIBLE PROMISSORY
NOTE]

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