EX-10.3



 Exhibit 10.3 

NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE
SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS. THIS
SECURITY AND THE SECURITIES ISSUABLE UPON CONVERSION OF THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES. 

Original Issue Date: November 28, 2016 
 Original Conversion
Price (subject to adjustment herein): $0.64 
 $2,028,767 

6% CONVERTIBLE DEBENTURE 

DUE NOVEMBER 28, 2019 

THIS 6% CONVERTIBLE DEBENTURE is one or more of a series of duly authorized and validly issued 6% Convertible Debentures of Microbot Medical
Inc. (formerly known as Stemcells, Inc.), a Delaware corporation (the “Company”), having its principal place of business at 5 Hamada Street, Yokneam 2069204 Israel, designated as its 6% Convertible Debenture due November 28,
2019 (this debenture, the “Debenture” and, collectively with the other debentures of such series, the “Debentures”). 

FOR VALUE RECEIVED, the Company promises to pay to Alpha Capital Anstalt or its registered assigns (the “Holder”), or shall
have paid pursuant to the terms hereunder, the principal sum of $2,028,767 on November 28, 2019 (the “Maturity Date”) or such earlier date as this Debenture is required or permitted to be repaid as provided hereunder, and to pay
interest to the Holder on the aggregate unconverted and then outstanding principal amount of this Debenture in accordance with the provisions hereof. This Debenture is subject to the following additional provisions: 

Section 1. Definitions. For the purposes hereof, in addition to the terms defined elsewhere in this Debenture,
(a) capitalized terms not otherwise defined herein shall have the meanings set forth in the Exchange Agreement and (b) the following terms shall have the following meanings: 

“Alternate Consideration” shall have the meaning set forth in Section 5(e). 

  
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 “Bankruptcy Event” means any of the following events:
(a) the Company or any Significant Subsidiary (as such term is defined in Rule 1-02(w) of Regulation S-X) thereof commences a case or other proceeding under any bankruptcy, reorganization, arrangement, adjustment of debt, relief of debtors,
dissolution, insolvency or liquidation or similar law of any jurisdiction relating to the Company or any Significant Subsidiary thereof, (b) there is commenced against the Company or any Significant Subsidiary thereof any such case or
proceeding that is not dismissed within 60 days after commencement, (c) the Company or any Significant Subsidiary thereof is adjudicated insolvent or bankrupt or any order of relief or other order approving any such case or proceeding is
entered, (d) the Company or any Significant Subsidiary thereof suffers any appointment of any custodian or the like for it or any substantial part of its property that is not discharged or stayed within 60 calendar days after such appointment,
(e) the Company or any Significant Subsidiary thereof makes a general assignment for the benefit of creditors, (f) the Company or any Significant Subsidiary thereof calls a meeting of its creditors with a view to arranging a composition,
adjustment or restructuring of its debts, (g) the Company or any Significant Subsidiary thereof admits in writing that it is generally unable to pay its debts as they become due, (h) the Company or any Significant Subsidiary thereof, by
any act or failure to act, expressly indicates its consent to, approval of or acquiescence in any of the foregoing or takes any corporate or other action for the purpose of effecting any of the foregoing. 

“Beneficial Ownership Limitation” shall have the meaning set forth in Section 4(d). 

“Business Day” means any day except any Saturday, any Sunday, any day which is a federal legal holiday in the
United States or any day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close. 

“Buy-In” shall have the meaning set forth in Section 4(c)(v). 

“Change of Control Transaction” means the occurrence after the date hereof of any of (a) an acquisition
after the date hereof by an individual or legal entity or “group” (as described in Rule 13d-5(b)(1) promulgated under the Exchange Act) of effective control (whether through legal or beneficial ownership of capital stock of the Company, by
contract or otherwise) of in excess of 33% of the voting securities of the Company (other than by means of conversion or exercise of the Debentures and the Securities issued together with the Debentures), (b) the Company merges into or
consolidates with any other Person, or any Person merges into or consolidates with the Company and, after giving effect to such transaction, the stockholders of the Company immediately prior to such transaction own less than 66% of the aggregate
voting power of the Company or the successor entity of such transaction, (c) the Company sells or transfers all or substantially all of its assets to another Person and the stockholders of the Company immediately prior


  
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to such transaction own less than 66% of the aggregate voting power of the acquiring entity immediately after the transaction, (d) a replacement at one time or within a three year period of
more than one-half of the members of the Board of Directors which is not approved by a majority of those individuals who are members of the Board of Directors on the Original Issue Date (or by those individuals who are serving as members of the
Board of Directors on any date whose nomination to the Board of Directors was approved by a majority of the members of the Board of Directors who are members on the date hereof), or (e) the execution by the Company of an agreement to which the
Company is a party or by which it is bound, providing for any of the events set forth in clauses (a) through (d) above. 

“Conversion” shall have the meaning ascribed to such term in Section 4. 

“Conversion Date” shall have the meaning set forth in Section 4(a). 

“Conversion Price” shall have the meaning set forth in Section 4(b). 

“Conversion Schedule” means the Conversion Schedule in the form of Schedule 1 attached hereto. 

“Conversion Shares” means, collectively, the shares of Common Stock issuable upon conversion of this Debenture
in accordance with the terms hereof. 
 “Debenture Register” shall have the meaning set forth in
Section 2(c). 
 “Event of Default” shall have the meaning set forth in Section 8(a). 

“Equity Conditions” means, during the period in question, (a) the Company shall have duly honored all
conversions and redemptions scheduled to occur or occurring by virtue of one or more Notices of Conversion of the Holder, if any, (b) the Company shall have paid all liquidated damages and other amounts owing to the Holder in respect of this
Debenture, (c)(i) there is an effective Registration statement pursuant to which the Holder is permitted to utilize the prospectus thereunder to resell all of the shares of Common Stock issuable pursuant to the Transaction Documents (and the Company
believes, in good faith, that such effectiveness will continue uninterrupted for the foreseeable future) or (ii) all of the Conversion Shares issuable pursuant to the Transaction Documents (and shares issuable in lieu of cash payments of
interest) may be resold pursuant to Rule 144 without volume or manner-of-sale restrictions or current public information requirements as determined by the counsel to the Company as set forth in a written opinion letter to such effect, addressed and
acceptable to the Transfer Agent and the Holder, (d) the Common Stock is trading on a Trading Market and all of the shares issuable pursuant to the Transaction Documents are listed or quoted for trading on such Trading Market (and the Company
believes, in good faith, that trading of the Common Stock on a Trading Market will continue uninterrupted for the foreseeable future), (e) there is a sufficient number of authorized but unissued and otherwise unreserved shares of Common Stock
for the issuance of all of the shares then issuable pursuant to the Transaction Documents, 

  
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(f) there is no existing Event of Default and no existing event which, with the passage of time or the giving of notice, would constitute an Event of Default, (g) the shares issuable upon
conversion in full of the Optional Redemption Amount) to the Holder would not violate the limitations set forth in Section 4(d) and Section 4(e) herein, (h) there has been no public announcement of a pending or proposed Fundamental
Transaction or Change of Control Transaction that has not been consummated, (i) the applicable Holder is not in possession of any information provided by the Company, any of its Subsidiaries, or any of their officers, directors, employees,
agents or Affiliates, that constitutes, or may constitute, material non-public information and (j) for each Trading Day in a period of 30 consecutive Trading Days prior to the applicable date in question, the daily trading volume for the Common
Stock on the principal Trading Market exceeds $250,000 per Trading Day. 
 “Exchange Agreement” means the
Securities Exchange Agreement, dated as of November 28, 2016 among the Company and the original Holders, as amended, modified or supplemented from time to time in accordance with its terms. 

“Fundamental Transaction” shall have the meaning set forth in Section 5(e). 

“Issuable Maximum” shall have the meaning set forth in Section 4(e). 

“Late Fees” shall have the meaning set forth in Section 2(d). 

“Mandatory Default Amount” means the sum of (a) the greater of (i) the outstanding principal amount
of this Debenture, plus all accrued and unpaid interest hereon, divided by the Conversion Price on the date the Mandatory Default Amount is either (A) demanded (if demand or notice is required to create an Event of Default) or otherwise due or
(B) paid in full, whichever has a lower Conversion Price, multiplied by the VWAP on the date the Mandatory Default Amount is either (x) demanded or otherwise due or (y) paid in full, whichever has a higher VWAP, or (ii) 130% of
the outstanding principal amount of this Debenture, plus 100% of accrued and unpaid interest hereon, and (b) all other amounts, costs, expenses and liquidated damages due in respect of this Debenture. 

“New York Courts” shall have the meaning set forth in Section 9(d). 

“Notice of Conversion” shall have the meaning set forth in Section 4(a). 

“Optional Redemption” shall have the meaning set forth in Section 6(a). 

“Optional Redemption Amount” means the sum of (a) 120% of the then outstanding principal amount of the
Debenture, (b) accrued but unpaid interest and (c) all liquidated damages and other amounts due in respect of the Debenture. 

“Optional Redemption Date” shall have the meaning set forth in Section 6(a). 

  
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 “Optional Redemption Notice” shall have the meaning set forth in
Section 6(a). 
 “Optional Redemption Notice Date” shall have the meaning set forth in
Section 6(a). 
 “Optional Redemption Period” shall have the meaning set forth in Section 6(a).

 “Original Issue Date” means the date of the first issuance of the Debentures, regardless of any transfers
of any Debenture and regardless of the number of instruments which may be issued to evidence such Debentures. 

“Permitted Indebtedness” means (a) the indebtedness evidenced by the Debentures, (b) the
indebtedness existing on the Original Issue Date or described in the Company’s filings with the Securities and Exchange Commission, (c) lease obligations and purchase money indebtedness of up to $250,000, in the aggregate, incurred in
connection with the acquisition of capital assets and lease obligations with respect to newly acquired or leased assets and (d) indebtedness that (i) is expressly subordinate to the Debentures pursuant to a written subordination agreement
with the Purchasers that is acceptable to each Purchaser in its sole and absolute discretion and (ii) matures at a date later than the 91st day following the Maturity Date. 

“Permitted Lien” means the individual and collective reference to the following: (a) Liens for taxes,
assessments and other governmental charges or levies not yet due or Liens for taxes, assessments and other governmental charges or levies being contested in good faith and by appropriate proceedings for which adequate reserves (in the good faith
judgment of the management of the Company) have been established in accordance with GAAP, (b) Liens imposed by law which were incurred in the ordinary course of the Company’s business, such as carriers’, warehousemen’s and
mechanics’ Liens, statutory landlords’ Liens, and other similar Liens arising in the ordinary course of the Company’s business, and which (x) do not individually or in the aggregate materially detract from the value of such
property or assets or materially impair the use thereof in the operation of the business of the Company and its consolidated Subsidiaries or (y) are being contested in good faith by appropriate proceedings, which proceedings have the effect of
preventing for the foreseeable future the forfeiture or sale of the property or asset subject to such Lien, (c) Liens incurred in connection with Permitted Indebtedness under clauses (a), (b) and (d)/(e) thereunder, and (d) Liens
incurred in connection with Permitted Indebtedness under clause (c) thereunder, provided that such Liens are not secured by assets of the Company or its Subsidiaries other than the assets so acquired or leased. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated
thereunder. 
 “Share Delivery Date” shall have the meaning set forth in Section 4(c)(ii). 

“Successor Entity” shall have the meaning set forth in Section 5(e). 

  
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 “Trading Day” means a day on which the principal Trading Market
is open for trading. 
 “Trading Market” means any of the following markets or exchanges on which the Common
Stock is listed or quoted for trading on the date in question: the NYSE MKT, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock Exchange, OTCQB or OTCQX (or any successors to any of the
foregoing). 
 “VWAP” means, for any date, the price determined by the first of the following clauses that
applies: (a) if the Common Stock is then listed or quoted on a Trading Market, the daily volume weighted average price of the Common Stock for such date (or the nearest preceding date) on the Trading Market on which the Common Stock is then
listed or quoted as reported by Bloomberg L.P. (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading Market, the volume weighted average price of the Common Stock
for such date (or the nearest preceding date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common Stock are then reported in the “Pink
Sheets” published by OTC Markets, Inc. (or a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common Stock so reported, or (d) in all other cases, the fair market
value of a share of Common Stock as determined by an independent appraiser selected in good faith by the Purchasers of a majority in interest of the Securities then outstanding and reasonably acceptable to the Company, the fees and expenses of which
shall be paid by the Company. 
 Section 2. Interest. 

a) Payment of Interest in Cash or Kind. The Company shall pay interest to the Holder on the aggregate unconverted and
then outstanding principal amount of this Debenture at the rate of 6% per annum, payable on each Conversion Date (as to that principal amount then being converted) and on the Maturity Date (each such date, an “Interest Payment
Date”) (if any Interest Payment Date is not a Business Day, then the applicable payment shall be due on the next succeeding Business Day), in cash. 

b) Interest Calculations. Interest shall be calculated on the basis of a 360-day year, consisting of twelve 30 calendar
day periods, and shall accrue daily commencing on the Original Issue Date until payment in full of the outstanding principal, together with all accrued and unpaid interest, liquidated damages and other amounts which may become due hereunder, has
been made. 
 c) Late Fee. All overdue accrued and unpaid interest to be paid hereunder shall entail a late fee at an
interest rate equal to the lesser of 18% per annum or the maximum rate permitted by applicable law (the “Late Fees”) which shall accrue daily from the date such interest is due hereunder through and including the date of actual
payment in full. 

  
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 d) Prepayment. Except as otherwise set forth in this Debenture, the
Company may not prepay any portion of the principal amount of this Debenture without the prior written consent of the Holder. The Company may prepay in cash any accrued but unpaid interest at any time without the prior written consent of the Holder.

 Section 3. Registration of Transfers and Exchanges. 

a) Different Denominations. This Debenture is exchangeable for an equal aggregate principal amount of Debentures of
different authorized denominations, as requested by the Holder surrendering the same. No service charge will be payable for such registration of transfer or exchange. 

b) Investment Representations. This Debenture has been issued subject to certain investment representations of the
original Holder set forth in the Exchange Agreement and may be transferred or exchanged only in compliance with the Exchange Agreement and applicable federal and state securities laws and regulations. 

c) Reliance on Debenture Register. Prior to due presentment for transfer to the Company of this Debenture, the Company
and any agent of the Company may treat the Person in whose name this Debenture is duly registered on the Debenture Register as the owner hereof for the purpose of receiving payment as herein provided and for all other purposes, whether or not this
Debenture is overdue, and neither the Company nor any such agent shall be affected by notice to the contrary. 
 Section 4.
Conversion. 
 a) Voluntary Conversion. At any time after the one-year anniversary of the Original Issue Date
until this Debenture is no longer outstanding, this Debenture shall be convertible, in whole or in part, into shares of Common Stock at the option of the Holder, at any time and from time to time (subject to the conversion limitations set forth in
Section 4(d) and Section 4(e) hereof). The Holder shall effect conversions by delivering to the Company a Notice of Conversion, the form of which is attached hereto as Annex A (each, a “Notice of Conversion”),
specifying therein the principal amount of this Debenture to be converted and the date on which such conversion shall be effected (such date, the “Conversion Date”). If no Conversion Date is specified in a Notice of Conversion, the
Conversion Date shall be the date that such Notice of Conversion is deemed delivered hereunder. No ink-original Notice of Conversion shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of
Conversion form be required. To effect conversions hereunder, the Holder shall not be required to physically surrender this Debenture to the Company unless the entire principal amount of this Debenture, plus all accrued and unpaid interest thereon,
has been so converted in which case the Holder shall surrender this Debenture as promptly as is reasonably practicable after such conversion without delaying the Company’s obligation to deliver the shares on the Share Delivery Date. Conversions
hereunder shall have the effect of lowering the outstanding principal amount of this Debenture in an amount equal 

  
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to the applicable conversion. The Holder and the Company shall maintain records showing the principal amount(s) converted and the date of such conversion(s). The Company may deliver an objection
to any Notice of Conversion within one (1) Business Day of delivery of such Notice of Conversion. In the event of any dispute or discrepancy, the records of the Holder shall be controlling and determinative in the absence of manifest error.
The Holder, and any assignee by acceptance of this Debenture, acknowledge and agree that, by reason of the provisions of this paragraph, following conversion of a portion of this Debenture, the unpaid and unconverted principal amount of this
Debenture may be less than the amount stated on the face hereof. 
 b) Conversion Price. The conversion price in
effect on any Conversion Date shall be equal to $0.64, subject to adjustment herein (the “Conversion Price”). 

c) Mechanics of Conversion. 

i. Conversion Shares Issuable Upon Conversion of Principal Amount. The number of Conversion Shares issuable upon a
conversion hereunder shall be determined by the quotient obtained by dividing (x) the outstanding principal amount of this Debenture to be converted by (y) the Conversion Price. 

ii. Delivery of Conversion Shares Upon Conversion. Not later than the earlier of (i) three (3) Trading Days
and (ii) the number of Trading Days comprising the Standard Settlement Period (as defined below) after each Conversion Date (the “Share Delivery Date”), the Company shall deliver, or cause to be delivered, to the Holder
(A) the Conversion Shares which, on or after the earlier of (i) the six month anniversary of the Original Issue Date or (ii) the Effective Date, shall be free of restrictive legends and trading restrictions (other than those which may
then be required by the Exchange Agreement) representing the number of Conversion Shares being acquired upon the conversion of this Debenture and (B) a bank check in the amount of accrued and unpaid interest. On or after the earlier of
(i) the six month anniversary of the Original Issue Date or (ii) the Effective Date, the Company shall deliver any Conversion Shares required to be delivered by the Company under this Section 4(c) electronically through the Depository
Trust Company or another established clearing corporation performing similar functions. As used herein, “Standard Settlement Period” means the standard settlement period, expressed in a number of Trading Days, on the Company’s
primary Trading Market with respect to the Common Stock as in effect on the date of delivery of the Notice of Conversion. 

iii. Failure to Deliver Conversion Shares. If, in the case of any Notice of Conversion, such Conversion Shares are not
delivered to or as directed by the applicable Holder by the Share Delivery Date, the Holder shall be entitled to elect by written notice to the Company at any time on or before its receipt of such Conversion Shares, to rescind such Conversion, in
which event the Company 

  
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shall promptly return to the Holder any original Debenture delivered to the Company and the Holder shall promptly return to the Company the Conversion Shares issued to such Holder pursuant to the
rescinded Conversion Notice. 
 iv. Obligation Absolute; Partial Liquidated Damages. The Company’s obligations to
issue and deliver the Conversion Shares upon conversion of this Debenture in accordance with the terms hereof are absolute and unconditional, irrespective of any action or inaction by the Holder to enforce the same, any waiver or consent with
respect to any provision hereof, the recovery of any judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or any breach or alleged breach by the Holder or any other Person
of any obligation to the Company or any violation or alleged violation of law by the Holder or any other Person, and irrespective of any other circumstance which might otherwise limit such obligation of the Company to the Holder in connection with
the issuance of such Conversion Shares; provided, however, that such delivery shall not operate as a waiver by the Company of any such action the Company may have against the Holder. In the event the Holder of this Debenture shall
elect to convert any or all of the outstanding principal amount hereof, the Company may not refuse conversion based on any claim that the Holder or anyone associated or affiliated with the Holder has been engaged in any violation of law, agreement
or for any other reason, unless an injunction from a court, on notice to Holder, restraining and or enjoining conversion of all or part of this Debenture shall have been sought and obtained, and the Company posts a surety bond for the benefit of the
Holder in the amount of 150% of the outstanding principal amount of this Debenture, which is subject to the injunction, which bond shall remain in effect until the completion of arbitration/litigation of the underlying dispute and the proceeds of
which shall be payable to the Holder to the extent it obtains judgment. In the absence of such injunction, the Company shall issue Conversion Shares or, if applicable, cash, upon a properly noticed conversion. If the Company fails for any reason to
deliver to the Holder such Conversion Shares pursuant to Section 4(c)(ii) by the Share Delivery Date, the Company shall pay to the Holder, in cash, as liquidated damages and not as a penalty, for each $1,000 of principal amount being converted,
$10 per Trading Day (increasing to $20 per Trading Day on the fifth (5th) Trading Day after such liquidated damages begin to accrue) for each Trading Day after such Share Delivery Date until
such Conversion Shares are delivered or Holder rescinds such conversion. Nothing herein shall limit a Holder’s right to pursue actual damages or declare an Event of Default pursuant to Section 8 hereof for the Company’s failure to
deliver Conversion Shares within the period specified herein and the Holder shall have the right to pursue all remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive
relief. The exercise of any such rights shall not prohibit the Holder from seeking to enforce damages pursuant to any other Section hereof or under applicable law. 

  
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 v. Compensation for Buy-In on Failure to Timely Deliver Conversion Shares Upon
Conversion. In addition to any other rights available to the Holder, if the Company fails for any reason to deliver to the Holder such Conversion Shares by the Share Delivery Date pursuant to Section 4(c)(ii), and if after such Share
Delivery Date the Holder is required by its brokerage firm to purchase (in an open market transaction or otherwise), or the Holder’s brokerage firm otherwise purchases, shares of Common Stock to deliver in satisfaction of a sale by the Holder
of the Conversion Shares which the Holder was entitled to receive upon the conversion relating to such Share Delivery Date (a “Buy-In”), then the Company shall (A) pay in cash to the Holder (in addition to any other remedies
available to or elected by the Holder) the amount, if any, by which (x) the Holder’s total purchase price (including any brokerage commissions) for the Common Stock so purchased exceeds (y) the product of (1) the aggregate number
of shares of Common Stock that the Holder was entitled to receive from the conversion at issue multiplied by (2) the actual sale price at which the sell order giving rise to such purchase obligation was executed (including any brokerage
commissions) and (B) at the option of the Holder, either reissue (if surrendered) this Debenture in a principal amount equal to the principal amount of the attempted conversion (in which case such conversion shall be deemed rescinded) or
deliver to the Holder the number of shares of Common Stock that would have been issued if the Company had timely complied with its delivery requirements under Section 4(c)(ii). For example, if the Holder purchases Common Stock having a total
purchase price of $11,000 to cover a Buy-In with respect to an attempted conversion of this Debenture with respect to which the actual sale price of the Conversion Shares (including any brokerage commissions) giving rise to such purchase obligation
was a total of $10,000 under clause (A) of the immediately preceding sentence, the Company shall be required to pay the Holder $1,000. The Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect
of the Buy-In and, upon request of the Company, evidence of the amount of such loss. Nothing herein shall limit a Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree
of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver Conversion Shares upon conversion of this Debenture as required pursuant to the terms hereof. 

vi. Reservation of Shares Issuable Upon Conversion. The Company covenants that it will at all times reserve and keep
available out of its authorized and unissued shares of Common Stock for the sole purpose of issuance upon conversion of this Debenture and payment of interest on this Debenture, each as herein provided, free from preemptive rights or any other
actual contingent purchase rights of Persons other than the Holder (and the other holders of the Debentures), not less than such aggregate number of shares of the Common Stock as shall (subject to the terms and conditions set forth in the Exchange
Agreement) be issuable (taking into account the adjustments and restrictions of Section 5) 

  
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upon the conversion of the then outstanding principal amount of this Debenture and payment of interest hereunder. The Company covenants that all shares of Common Stock that shall be so issuable
shall, upon issue, be duly authorized, validly issued, fully paid and nonassessable. 
 vii. Fractional Shares. No
fractional shares or scrip representing fractional shares shall be issued upon the conversion of this Debenture. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such conversion, the Company shall at its
election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Conversion Price or round up to the next whole share. 

viii. Transfer Taxes and Expenses. The issuance of Conversion Shares on conversion of this Debenture shall be made
without charge to the Holder hereof for any documentary stamp or similar taxes that may be payable in respect of the issue or delivery of such Conversion Shares, provided that the Company shall not be required to pay any tax that may be payable in
respect of any transfer involved in the issuance and delivery of any such Conversion Shares upon conversion in a name other than that of the Holder of this Debenture so converted and the Company shall not be required to issue or deliver such
Conversion Shares unless or until the Person or Persons requesting the issuance thereof shall have paid to the Company the amount of such tax or shall have established to the satisfaction of the Company that such tax has been paid. The Company shall
pay all Transfer Agent fees required for same-day processing of any Notice of Conversion and all fees to the Depository Trust Company (or another established clearing corporation performing similar functions) required for same-day electronic
delivery of the Conversion Shares. 
 d) Holder’s Conversion Limitations. The Company shall not effect any
conversion of this Debenture, and a Holder shall not have the right to convert any portion of this Debenture, to the extent that after giving effect to the conversion set forth on the applicable Notice of Conversion, the Holder (together with the
Holder’s Affiliates, and any other Persons acting as a group together with the Holder or any of the Holder’s Affiliates (such Persons, “Attribution Parties”)) would beneficially own in excess of the Beneficial Ownership
Limitation (as defined below). For purposes of the foregoing sentence, the number of shares of Common Stock beneficially owned by the Holder and its Affiliates and Attribution Parties shall include the number of shares of Common Stock issuable
upon conversion of this Debenture with respect to which such determination is being made, but shall exclude the number of shares of Common Stock which are issuable upon (i) conversion of the remaining, unconverted principal amount of this
Debenture beneficially owned by the Holder or any of its Affiliates or Attribution Parties and (ii) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company subject to a limitation on conversion or
exercise analogous to the limitation contained herein (including, without limitation, any other Debentures or the Warrants) beneficially owned by the Holder or any of its Affiliates or Attribution
Parties.

  
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Except as set forth in the preceding sentence, for purposes of this Section 4(d), beneficial ownership shall be calculated in accordance with Section 13(d) of the Exchange Act and the
rules and regulations promulgated thereunder. To the extent that the limitation contained in this Section 4(d) applies, the determination of whether this Debenture is convertible (in relation to other securities owned by the Holder together
with any Affiliates and Attribution Parties) and of which principal amount of this Debenture is convertible shall be in the sole discretion of the Holder, and the submission of a Notice of Conversion shall be deemed to be the Holder’s
determination of whether this Debenture may be converted (in relation to other securities owned by the Holder together with any Affiliates or Attribution Parties) and which principal amount of this Debenture is convertible, in each case subject to
the Beneficial Ownership Limitation. To ensure compliance with this restriction, the Holder will be deemed to represent to the Company each time it delivers a Notice of Conversion that such Notice of Conversion has not violated the restrictions set
forth in this paragraph and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a determination as to any group status as contemplated above shall be determined in accordance with
Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. For purposes of this Section 4(d), in determining the number of outstanding shares of Common Stock, the Holder may rely on the number of outstanding
shares of Common Stock as stated in the most recent of the following: (i) the Company’s most recent periodic or annual report filed with the Commission, as the case may be, (ii) a more recent public announcement by the Company, or
(iii) a more recent written notice by the Company or the Company’s transfer agent setting forth the number of shares of Common Stock outstanding. Upon the written or oral request of a Holder, the Company shall within two Trading Days
confirm orally and in writing to the Holder the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities
of the Company, including this Debenture, by the Holder or its Affiliates since the date as of which such number of outstanding shares of Common Stock was reported. The “Beneficial Ownership Limitation” shall be 4.99% of the number
of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock issuable upon conversion of this Debenture held by the Holder. The Holder, upon notice to the Company, may increase or decrease the
Beneficial Ownership Limitation provisions of this Section 4(d), provided that the Beneficial Ownership Limitation in no event exceeds 9.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance
of shares of Common Stock upon conversion of this Debenture held by the Holder and the Beneficial Ownership Limitation provisions of this Section 4(d) shall continue to apply. Any increase in the Beneficial Ownership Limitation will not be
effective until the 61st day after such notice is delivered to the Company. The Beneficial Ownership Limitation provisions of this paragraph shall be construed and implemented in a manner
otherwise than in strict conformity with the terms of this Section 4(d) to correct this paragraph (or any portion hereof) which may be defective or inconsistent with the intended Beneficial Ownership Limitation contained herein or to make
changes or supplements necessary or desirable to properly give effect to such limitation. The limitations contained in this paragraph shall apply to a successor holder of this Debenture. 

  
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 e) Issuance Limitations. Notwithstanding anything herein to the contrary,
if the Company has not obtained Shareholder Approval, then the Company may not issue, upon conversion of this Debenture, a number of shares of Common Stock which, when aggregated with any shares of Common Stock issued on or after the Original Issue
Date and prior to such Conversion Date in connection with the conversion of any Debentures issued pursuant to the Exchange Agreement, would exceed 7,247,222 shares of Common Stock (subject to adjustment for forward and reverse stock splits,
recapitalizations and the like) (such number of shares, the “Issuable Maximum”). Each Holder shall be entitled to a portion of the Issuable Maximum equal to the quotient obtained by dividing (x) the original principal amount of
the Holder’s Debenture by (y) the aggregate original principal amount of all Debentures issued on the Original Issue Date to all Holders. In addition, each Holder may allocate its pro-rata portion of the Issuable Maximum among Debentures
held by it in its sole discretion. Such portion shall be adjusted upward ratably in the event a Holder no longer holds any Debentures and the amount of shares issued to the Holder pursuant to the Holder’s Debentures was less than the
Holder’s pro-rata share of the Issuable Maximum. 
 Section 5. Certain Adjustments. 

a) Stock Dividends and Stock Splits. If the Company, at any time while this Debenture is outstanding: (i) pays a
stock dividend or otherwise makes a distribution or distributions payable in shares of Common Stock on shares of Common Stock or any Common Stock Equivalents (which, for avoidance of doubt, shall not include any shares of Common Stock issued by the
Company upon conversion of, or payment of interest on, the Debentures), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way of a reverse stock split) outstanding shares of
Common Stock into a smaller number of shares or (iv) issues, in the event of a reclassification of shares of the Common Stock, any shares of capital stock of the Company, then the Conversion Price shall be multiplied by a fraction of which the
numerator shall be the number of shares of Common Stock (excluding any treasury shares of the Company) outstanding immediately before such event, and of which the denominator shall be the number of shares of Common Stock outstanding immediately
after such event. Any adjustment made pursuant to this Section shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective immediately
after the effective date in the case of a subdivision, combination or re-classification. The Holder acknowledges and agrees that the Conversion Price in Section 4(b) takes into account the reverse stock
split of the Company’s common stock on or immediately after the Original Issue Date. 

  
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 b) [Intentionally Omitted]. 

c) [Intentionally Omitted.]. 

d) [Intentionally Omitted.] 

e) Fundamental Transaction. If, at any time while this Debenture is outstanding, (i) the Company, directly or
indirectly, in one or more related transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company, directly or indirectly, effects any sale, lease, license, assignment, transfer, conveyance or
other disposition of all or substantially all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange offer (whether by the Company or another Person) is completed
pursuant to which holders of Common Stock are permitted to sell, tender or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of the outstanding Common Stock, (iv) the Company,
directly or indirectly, in one or more related transactions effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is effectively converted into or
exchanged for other securities, cash or property, (v) the Company, directly or indirectly, in one or more related transactions consummates a stock or share purchase agreement or other business combination (including, without limitation, a
reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than 50% of the outstanding shares of Common Stock (not including any shares of Common Stock held by the other Person or
other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination) (each a “Fundamental Transaction”), then, upon any
subsequent conversion of this Debenture, the Holder shall have the right to receive, for each Conversion Share that would have been issuable upon such conversion immediately prior to the occurrence of such Fundamental Transaction (without regard to
any limitation in Section 4(d) and Section 4(e) on the conversion of this Debenture), the number of shares of Common Stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and any additional
consideration (the “Alternate Consideration”) receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which this Debenture is convertible immediately prior to such Fundamental
Transaction (without regard to any limitation in Section 4(d) and Section 4(e) on the conversion of this Debenture). For purposes of any such conversion, the determination of the Conversion Price shall be appropriately adjusted to apply to
such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one (1) share of Common Stock in such Fundamental Transaction, and the Company shall apportion the Conversion Price among the Alternate
Consideration in a reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock are given any choice as to the securities, cash or property to be received in a Fundamental
Transaction, then the Holder shall be given the same choice as to the Alternate Consideration it receives upon any 

  
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conversion of this Debenture following such Fundamental Transaction. The Company shall cause any successor entity in a Fundamental Transaction in which the Company is not the survivor (the
“Successor Entity”) to assume in writing all of the obligations of the Company under this Debenture and the other Transaction Documents (as defined in the Exchange Agreement) in accordance with the provisions of this
Section 5(e) pursuant to written agreements in form and substance reasonably satisfactory to the Holder and approved by the Holder (without unreasonable delay) prior to such Fundamental Transaction and shall, at the option of the holder of this
Debenture, deliver to the Holder in exchange for this Debenture a security of the Successor Entity evidenced by a written instrument substantially similar in form and substance to this Debenture which is convertible for a corresponding number of
shares of capital stock of such Successor Entity (or its parent entity) equivalent to the shares of Common Stock acquirable and receivable upon conversion of this Debenture (without regard to any limitations on the conversion of this Debenture)
prior to such Fundamental Transaction, and with a conversion price which applies the conversion price hereunder to such shares of capital stock (but taking into account the relative value of the shares of Common Stock pursuant to such Fundamental
Transaction and the value of such shares of capital stock, such number of shares of capital stock and such conversion price being for the purpose of protecting the economic value of this Debenture immediately prior to the consummation of such
Fundamental Transaction), and which is reasonably satisfactory in form and substance to the Holder. Upon the occurrence of any such Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and after the
date of such Fundamental Transaction, the provisions of this Debenture and the other Transaction Documents referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and
shall assume all of the obligations of the Company under this Debenture and the other Transaction Documents with the same effect as if such Successor Entity had been named as the Company herein. 

f) Calculations. All calculations under this Section 5 shall be made to the nearest cent or the nearest 1/100th of
a share, as the case may be. For purposes of this Section 5, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the sum of the number of shares of Common Stock (excluding any treasury shares of
the Company) issued and outstanding. 
 g) Notice to the Holder. 

i. Adjustment to Conversion Price. Whenever the Conversion Price is adjusted pursuant to any provision of this
Section 5, the Company shall promptly deliver to each Holder a notice setting forth the Conversion Price after such adjustment and setting forth a brief statement of the facts requiring such adjustment. 

ii. Notice to Allow Conversion by Holder. If (A) the Company shall declare a dividend (or any other distribution in
whatever form) on the Common 

  
 15 








 
Stock, (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the Common Stock, (C) the Company shall authorize the granting to all holders of the
Common Stock of rights or warrants to subscribe for or purchase any shares of capital stock of any class or of any rights, (D) the approval of any stockholders of the Company shall be required in connection with any reclassification of the
Common Stock, any consolidation or merger to which the Company is a party, any sale or transfer of all or substantially all of the assets of the Company, or any compulsory share exchange whereby the Common Stock is converted into other securities,
cash or property or (E) the Company shall authorize the voluntary or involuntary dissolution, liquidation or winding up of the affairs of the Company, then, in each case, the Company shall cause to be filed at each office or agency maintained
for the purpose of conversion of this Debenture, and shall cause to be delivered to the Holder at its last address as it shall appear upon the Debenture Register, at least twenty (20) calendar days prior to the applicable record or effective
date hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the holders of
the Common Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date on which such reclassification, consolidation, merger, sale, transfer or share exchange is expected
to become effective or close, and the date as of which it is expected that holders of the Common Stock of record shall be entitled to exchange their shares of the Common Stock for securities, cash or other property deliverable upon such
reclassification, consolidation, merger, sale, transfer or share exchange, provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the corporate action required to be
specified in such notice. To the extent that any notice provided hereunder constitutes, or contains, material, non-public information regarding the Company or any of the Subsidiaries, the Company shall simultaneously file such notice with the
Commission pursuant to a Current Report on Form 8-K. The Holder shall remain entitled to convert this Debenture during the 20-day period commencing on the date of such notice through the effective date of the event triggering such notice except as
may otherwise be expressly set forth herein. 
 Section 6. Redemption; Forced Conversion at Maturity. 

a) Optional Redemption at Election of Company. Subject to the provisions of this Section 6(a), at any time after
the 12-month anniversary of the Effective Date, the Company may deliver a notice to the Holder (an “Optional Redemption Notice” and the date such notice is deemed delivered hereunder, the “Optional Redemption Notice
Date”) of its irrevocable election to redeem some or all of the then outstanding principal amount of this Debenture for cash in an amount equal to the Optional Redemption Amount on the
30th Trading Day following the Optional Redemption Notice Date (such date, the “Optional Redemption Date”, such 30 Trading Day period, the “Optional Redemption 


  
 16 








 
Period” and such redemption, the “Optional Redemption”). The Optional Redemption Amount is payable in full on the Optional Redemption Date. The Company may only
effect an Optional Redemption if each of the Equity Conditions shall have been met (unless waived in writing by the Holder) on each Trading Day during the period commencing on the Optional Redemption Notice Date through to the Optional Redemption
Date and through and including the date payment of the Optional Redemption Amount is actually made in full. If any of the Equity Conditions shall cease to be satisfied at any time during the Optional Redemption Period, then the Holder may elect to
nullify the Optional Redemption Notice by notice to the Company within 3 Trading Days after the first day on which any such Equity Condition has not been met (provided that if, by a provision of the Transaction Documents, the Company is obligated to
notify the Holder of the non-existence of an Equity Condition, such notice period shall be extended to the third Trading Day after proper notice from the Company) in which case the Optional Redemption Notice shall be null and void, ab
initio. The Company covenants and agrees that it will honor all Notices of Conversion tendered from the time of delivery of the Optional Redemption Notice through the date all amounts owing thereon are due and paid in full. The Company’s
determination to pay an Optional Redemption in cash shall be applied ratably to all of the holders of the then outstanding Debentures based on their (or their predecessor’s) initial purchases of Debentures pursuant to the Exchange Agreement.

 b) Redemption Procedure. The payment of cash pursuant to an Optional Redemption shall be payable on the Optional
Redemption Date. If any portion of the payment pursuant to an Optional Redemption shall not be paid by the Company by the applicable due date, interest shall accrue thereon at an interest rate equal to the lesser of 18% per annum or the maximum
rate permitted by applicable law until such amount is paid in full. Notwithstanding anything herein contained to the contrary, if any portion of the Optional Redemption Amount remains unpaid after such date, the Holder may elect, by written notice
to the Company given at any time thereafter, to invalidate such Optional Redemption, ab initio, and, with respect to the Company’s failure to honor the Optional Redemption, the Company shall have no further right to exercise
such Optional Redemption. Notwithstanding anything to the contrary in this Section 6, the Company’s determination to redeem in cash or its elections under Section 6(b) shall be applied ratably among the Holders of Debentures. The
Holder may elect to convert the outstanding principal amount of the Debenture pursuant to Section 4 prior to actual payment in cash for any redemption under this Section 6 by the delivery of a Notice of Conversion to the Company. 

c) Forced Conversion. Notwithstanding anything herein to the contrary, on the Maturity Date, the Company may, upon 30
Trading Days’ prior written notice to the Holder (a “Forced Conversion Notice” and the date such notice is delivered to the Holder, the “Forced Conversion Notice Date”), cause the Holder to convert all or part
of the then outstanding principal amount of this Debenture plus, if so specified in the Forced Conversion Notice, accrued but unpaid interest, liquidated damages and other amounts owing to the Holder under this Debenture, it being agreed that the
“Conversion Date” for 

  
 17 








 
purposes of Section 4 shall be deemed to occur on the Maturity Date. The Company may not deliver a Forced Conversion Notice, and any Forced Conversion Notice delivered by the Company shall
not be effective, unless all of the Equity Conditions are met (unless waived in writing by the Holder) on each Trading Day occurring from the Forced Conversion Notice Date through the Maturity Date. Any Forced Conversion shall be applied ratably to
all Holders based on their initial purchases of Debentures pursuant to the Exchange Agreement, provided that any voluntary conversions by a Holder shall be applied against the Holder’s pro rata allocation, thereby decreasing the aggregate
amount forcibly converted hereunder if only a portion of this Debenture is forcibly converted. For purposes of clarification, a Forced Conversion shall be subject to all of the provisions of Section 4, including, without limitation, the
provision requiring payment of liquidated damages and limitations on conversions. 
 Section 7. Negative Covenants. As
long as any portion of this Debenture remains outstanding, unless the holders of at least 67% in principal amount of the then outstanding Debentures shall have otherwise given prior written consent, the Company shall not, and shall not permit any of
the Subsidiaries to, directly or indirectly: 
 a) other than Permitted Indebtedness, enter into, create, incur, assume,
guarantee or suffer to exist any indebtedness for borrowed money of any kind, including, but not limited to, a guarantee, on or with respect to any of its property or assets now owned or hereafter acquired or any interest therein or any income or
profits therefrom; 
 b) other than Permitted Liens, enter into, create, incur, assume or suffer to exist any Liens of any
kind, on or with respect to any of its property or assets now owned or hereafter acquired or any interest therein or any income or profits therefrom; 

c) amend its charter documents, including, without limitation, its certificate of incorporation and bylaws, in any manner that
materially and adversely affects any rights of the Holder; 
 d) repay, repurchase or offer to repay, repurchase or otherwise
acquire more than a de minimis number of shares of its Common Stock or Common Stock Equivalents other than as to (i) the Conversion Shares or Warrant Shares as permitted or required under the Transaction Documents and
(ii) repurchases of Common Stock or Common Stock Equivalents of departing officers and directors of the Company, provided that such repurchases shall not exceed an aggregate of $100,000 for all officers and directors during the term of this
Debenture; 
 e) repay, repurchase or offer to repay, repurchase or otherwise acquire any indebtedness for borrowed money,
other than the Debentures if on a pro-rata basis, other than regularly scheduled principal and interest payments as such terms are in effect as of the Original Issue Date, provided that such payments shall not be permitted if, at such time, or after
giving effect to such payment, any Event of Default exist or occur; 

  
 18 








 f) pay cash dividends or distributions on any equity securities of the Company;

 g) enter into any transaction with any Affiliate of the Company which would be required to be disclosed in any public
filing with the Commission, unless such transaction is made on an arm’s-length basis and expressly approved by a majority of the disinterested directors of the Company (even if less than a quorum otherwise required for board approval); or 

h) enter into any agreement with respect to any of the foregoing. 

Section 8. Events of Default. 

a) “Event of Default” means, wherever used herein, any of the following events (whatever the reason for such
event and whether such event shall be voluntary or involuntary or effected by operation of law or pursuant to any judgment, decree or order of any court, or any order, rule or regulation of any administrative or governmental body): 

i. any default in the payment of (A) the principal amount of any Debenture or (B) interest, liquidated damages and
other amounts owing to a Holder on any Debenture, as and when the same shall become due and payable (whether on a Conversion Date or the Maturity Date or by acceleration or otherwise) which default, solely in the case of an interest payment or other
default under clause (B) above, is not cured within 3 Trading Days; 
 ii. the Company shall fail to observe or perform
any other covenant or agreement contained in the Debentures (other than a breach by the Company of its obligations to deliver shares of Common Stock to the Holder upon conversion, which breach is addressed in clause (ix) below) or in any
Transaction Document, which failure is not cured, if possible to cure, within the earlier to occur of (A) 5 Trading Days after notice of such failure sent by the Holder or by any other Holder to the Company and (B) 10 Trading Days after
the Company has become or should have become aware of such failure; 
 iii. a default or event of default (subject to any
grace or cure period provided in the applicable agreement, document or instrument) shall occur under (A) any of the Transaction Documents or (B) any other material agreement, lease, document or instrument to which the Company or any
Subsidiary is obligated (and not covered by clause (vi) below); 
 iv. any representation or warranty made in this
Debenture, any other Transaction Documents, any written statement pursuant hereto or thereto or any other report, financial statement or certificate made or delivered to the Holder or any other Holder shall be untrue or incorrect in any material
respect as of the date when made or deemed made; 

  
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 v. the Company or any Significant Subsidiary (as such term is defined in Rule
1-02(w) of Regulation S-X) shall be subject to a Bankruptcy Event; 
 vi. the Company or any Subsidiary shall default on any
of its obligations under any mortgage, credit agreement or other facility, indenture agreement, factoring agreement or other instrument under which there may be issued, or by which there may be secured or evidenced, any indebtedness for borrowed
money or money due under any long term leasing or factoring arrangement that (a) involves an obligation greater than $150,000, whether such indebtedness now exists or shall hereafter be created, and (b) results in such indebtedness
becoming or being declared due and payable prior to the date on which it would otherwise become due and payable; 
 vii. the
Common Stock shall not be eligible for listing or quotation for trading on a Trading Market and shall not be eligible to resume listing or quotation for trading thereon within five Trading Days; 

viii. the Company shall be a party to any Change of Control Transaction or Fundamental Transaction or shall agree to sell or
dispose of all or in excess of 33% of its assets in one transaction or a series of related transactions (whether or not such sale would constitute a Change of Control Transaction); 

ix. the Company shall fail for any reason to deliver Conversion Shares to a Holder prior to the fifth Trading Day after a
Conversion Date pursuant to Section 4(c) or the Company shall provide at any time notice to the Holder, including by way of public announcement, of the Company’s intention to not honor requests for conversions of any Debentures in
accordance with the terms hereof; 
 x. any Person shall breach any agreement delivered to the initial Holders pursuant to
Section 2.2 of the Exchange Agreement; 
 xi. the electronic transfer by the Company of shares of Common Stock through
the Depository Trust Company or another established clearing corporation is no longer available or is subject to a “chill”; or 

xii. any monetary judgment, writ or similar final process shall be entered or filed against the Company, any subsidiary or any
of their respective property or other assets for more than $150,000, and such judgment, writ or similar final process shall remain unvacated, unbonded or unstayed for a period of 45 calendar days; 

  
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 b) Remedies Upon Event of Default. If any Event of Default occurs, the
outstanding principal amount of this Debenture, plus accrued but unpaid interest, liquidated damages and other amounts owing in respect thereof through the date of acceleration, shall become, at the Holder’s election, immediately due and
payable in cash at the Mandatory Default Amount. Commencing 5 days after the occurrence of any Event of Default that results in the eventual acceleration of this Debenture, the interest rate on this Debenture shall accrue at an interest rate equal
to the lesser of 18% per annum or the maximum rate permitted under applicable law. Upon the payment in full of the Mandatory Default Amount, the Holder shall promptly surrender this Debenture to or as directed by the Company. In connection with
such acceleration described herein, the Holder need not provide, and the Company hereby waives, any presentment, demand, protest or other notice of any kind, and the Holder may immediately and without expiration of any grace period enforce any and
all of its rights and remedies hereunder and all other remedies available to it under applicable law. Such acceleration may be rescinded and annulled by Holder at any time prior to payment hereunder and the Holder shall have all rights as a holder
of the Debenture until such time, if any, as the Holder receives full payment pursuant to this Section 8(b). No such rescission or annulment shall affect any subsequent Event of Default or impair any right consequent thereon. 

Section 9. Miscellaneous. 

a) Notices. Any and all notices or other communications or deliveries to be provided by the Holder hereunder, including,
without limitation, any Notice of Conversion, shall be in writing and delivered personally, by facsimile, by email attachment, or sent by a nationally recognized overnight courier service, addressed to the Company, at the address set forth above, or
such other facsimile number, email address, or address as the Company may specify for such purposes by notice to the Holder delivered in accordance with this Section 9(a). Any and all notices or other communications or deliveries to be
provided by the Company hereunder shall be in writing and delivered personally, by facsimile, by email attachment, or sent by a nationally recognized overnight courier service addressed to each Holder at the facsimile number, email address or
address of the Holder appearing on the books of the Company, or if no such facsimile number or email attachment or address appears on the books of the Company, at the principal place of business of such Holder, as set forth in the Exchange
Agreement. Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number or
email attachment to the email address set forth on the signature pages attached hereto prior to 5:30 p.m. (New York City time) on any date, (ii) the next Trading Day after the date of transmission, if such notice or communication is delivered
via facsimile at the facsimile number or email attachment to the email address set forth on the signature pages attached hereto on a day that is not a Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the second
Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service or (iv) upon actual receipt by the party to whom such notice is required to be given. 

  
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 b) Absolute Obligation. Except as expressly provided herein, no provision
of this Debenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of, liquidated damages and accrued interest, as applicable, on this Debenture at the time, place, and rate, and in the
coin or currency, herein prescribed. This Debenture is a direct debt obligation of the Company. This Debenture ranks pari passu with all other Debentures now or hereafter issued under the terms set forth herein. 

c) Lost or Mutilated Debenture. If this Debenture shall be mutilated, lost, stolen or destroyed, the Company shall
execute and deliver, in exchange and substitution for and upon cancellation of a mutilated Debenture, or in lieu of or in substitution for a lost, stolen or destroyed Debenture, a new Debenture for the principal amount of this Debenture so
mutilated, lost, stolen or destroyed, but only upon receipt of evidence of such loss, theft or destruction of such Debenture, and of the ownership hereof, reasonably satisfactory to the Company. 

d) Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Debenture
shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflict of laws thereof. Each party agrees that all legal proceedings concerning the interpretation,
enforcement and defense of the transactions contemplated by any of the Transaction Documents (whether brought against a party hereto or its respective Affiliates, directors, officers, shareholders, employees or agents) shall be commenced in the
state and federal courts sitting in the City of New York, Borough of Manhattan (the “New York Courts”). Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the New York Courts for the adjudication of any
dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in
any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of such New York Courts, or such New York Courts are improper or inconvenient venue for such proceeding. Each party hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for
notices to it under this Debenture and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any other manner
permitted by applicable law. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Debenture or the transactions
contemplated hereby. If any party shall commence an action or proceeding to enforce any provisions of this Debenture, then the prevailing party in such action or proceeding shall be reimbursed by the other party for its attorneys fees and other
costs and expenses incurred in the investigation, preparation and prosecution of such action or proceeding. 

  
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 e) Waiver. Any waiver by the Company or the Holder of a breach of any
provision of this Debenture shall not operate as or be construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Debenture. The failure of the Company or the Holder to insist upon strict adherence
to any term of this Debenture on one or more occasions shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Debenture on any other occasion. Any waiver
by the Company or the Holder must be in writing. 
 f) Severability. If any provision of this Debenture is invalid,
illegal or unenforceable, the balance of this Debenture shall remain in effect, and if any provision is inapplicable to any Person or circumstance, it shall nevertheless remain applicable to all other Persons and circumstances. If it shall be found
that any interest or other amount deemed interest due hereunder violates the applicable law governing usury, the applicable rate of interest due hereunder shall automatically be lowered to equal the maximum rate of interest permitted under
applicable law. The Company covenants (to the extent that it may lawfully do so) that it shall not at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay, extension or usury law or other law
which would prohibit or forgive the Company from paying all or any portion of the principal of or interest on this Debenture as contemplated herein, wherever enacted, now or at any time hereafter in force, or which may affect the covenants or the
performance of this Debenture, and the Company (to the extent it may lawfully do so) hereby expressly waives all benefits or advantage of any such law, and covenants that it will not, by resort to any such law, hinder, delay or impede the execution
of any power herein granted to the Holder, but will suffer and permit the execution of every such as though no such law has been enacted. 

g) Remedies, Characterizations, Other Obligations, Breaches and Injunctive Relief. The remedies provided in this
Debenture shall be cumulative and in addition to all other remedies available under this Debenture and any of the other Transaction Documents at law or in equity (including a decree of specific performance and/or other injunctive relief), and
nothing herein shall limit the Holder’s right to pursue actual and consequential damages for any failure by the Company to comply with the terms of this Debenture. The Company covenants to the Holder that there shall be no characterization
concerning this instrument other than as expressly provided herein. Amounts set forth or provided for herein with respect to payments, conversion and the like (and the computation thereof) shall be the amounts to be received by the Holder and shall
not, except as expressly provided herein, be subject to any other obligation of the Company (or the performance thereof). The Company acknowledges that a breach by it of its obligations hereunder will cause irreparable harm to the Holder and that
the remedy at law for any such breach may be inadequate. The Company therefore agrees that, in the event of any such breach or threatened breach, the Holder shall be entitled, in addition to 

  
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all other available remedies, to an injunction restraining any such breach or any such threatened breach, without the necessity of showing economic loss and without any bond or other security
being required. The Company shall provide all information and documentation to the Holder that is requested by the Holder to enable the Holder to confirm the Company’s compliance with the terms and conditions of this Debenture. 

h) Next Business Day. Whenever any payment or other obligation hereunder shall be due on a day other than a Business
Day, such payment shall be made on the next succeeding Business Day. 
 i) Headings. The headings contained herein are
for convenience only, do not constitute a part of this Debenture and shall not be deemed to limit or affect any of the provisions hereof. 

Section 10. Disclosure. Upon receipt or delivery by the Company of any notice in accordance with the terms of this Debenture,
unless the Company has in good faith determined that the matters relating to such notice do not constitute material, nonpublic information relating to the Company or its Subsidiaries, the Company shall within four (4) Business Days after such
receipt or delivery publicly disclose such material, nonpublic information on a Current Report on Form 8-K or otherwise. In the event that the Company believes that a notice contains material, non-public information relating to the Company or its
Subsidiaries, the Company so shall indicate to the Holder contemporaneously with delivery of such notice, and in the absence of any such indication, the Holder shall be allowed to presume that all matters relating to such notice do not constitute
material, nonpublic information relating to the Company or its Subsidiaries. 
 ********************* 

(Signature Pages Follow) 

  
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 IN WITNESS WHEREOF, the Company has caused this Debenture to be duly executed by a duly
authorized officer as of the date first above indicated. 
  

			
	MICROBOT MEDICAL INC. (F/K/A STEMCELLS, INC.)
		
	By:	 	 /s/ Harel Gadot

		 	Name: Harel Gadot
		 	Title:   Chairman and CEO
	
	Facsimile No. for delivery of Notices:                         




  
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 ANNEX A 

NOTICE OF CONVERSION 
 The
undersigned hereby elects to convert principal under the 6% Convertible Debenture due November 28, 2019 of Microbot Medical Inc., a Delaware corporation (the “Company”), into shares of common stock (the “Common
Stock”), of the Company according to the conditions hereof, as of the date written below. If shares of Common Stock are to be issued in the name of a person other than the undersigned, the undersigned will pay all transfer taxes payable
with respect thereto and is delivering herewith such certificates and opinions as reasonably requested by the Company in accordance therewith. No fee will be charged to the holder for any conversion, except for such transfer taxes, if any. 

By the delivery of this Notice of Conversion the undersigned represents and warrants to the Company that its ownership of the Common Stock
does not exceed the amounts specified under Section 4 of this Debenture, as determined in accordance with Section 13(d) of the Exchange Act. 

The undersigned agrees to comply with the prospectus delivery requirements under the applicable securities laws in connection with any
transfer of the aforesaid shares of Common Stock. 
  

			
	Conversion calculations:	  	
		
		  	Date to Effect Conversion:
		
		  	Principal Amount of Debenture to be Converted:
		
		  	Payment of Interest:
		
		  	Number of shares of Common Stock to be issued:
		
		  	Signature:
		
		  	Name:
		
		  	Address for Delivery of Common Stock Certificates:
		
		  	Or
		
		  	DWAC Instructions:
		
		  	Broker No:                       
		  	Account No:                     


  
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 Schedule 1 

CONVERSION SCHEDULE 
 The 6% Convertible
Debentures due on November 28, 2019 in the aggregate principal amount of $2,028,767 are issued by Microbot Medical Inc., a Delaware corporation. This Conversion Schedule reflects conversions made under Section 4 of the above referenced
Debenture. 
 Dated:                     

  

							
	 Date of Conversion

(or for first entry,
 Original Issue
Date)
	 	 Amount of

Conversion
	 	 Aggregate

Principal
 Amount

Remaining
 Subsequent to

Conversion
 (or original

Principal
 Amount)
	 	 Company Attest

		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	
		 		 		 	


  
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