CONVERTIBLE DEBENTURE INDENTURE DATED AS OF THE 2ND convertible debenture indenture dated as of the

CONVERTIBLE DEBENTURE INDENTURE

DATED AS OF THE 2ND DAY OF SEPTEMBER, 2016

AMONG

ABBA MEDIX GROUP INC.

AND

COMPUTERSHARE TRUST COMPANY OF CANADA

PROVIDING FOR THE ISSUE OF DEBENTURES

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TABLE OF CONTENTS

Page

ARTICLE 1 INTERPRETATION ............................................................................................................................. 1 1.1 Definitions......................................................................................................................................... 1 1.2 Meaning of "Outstanding" ................................................................................................................ 6 1.3 Interpretation ..................................................................................................................................... 6 1.4 Headings, Etc. ................................................................................................................................... 7 1.5 Time of Essence ................................................................................................................................ 7 1.6 Monetary References ........................................................................................................................ 7 1.7 Invalidity, Etc. ................................................................................................................................... 7 1.8 Language ........................................................................................................................................... 7 1.9 Successors and Assigns ..................................................................................................................... 7 1.10 Severability ....................................................................................................................................... 7 1.11 Entire Agreement .............................................................................................................................. 7 1.12 Benefits of Indenture ......................................................................................................................... 8 1.13 Applicable Law and Attornment ....................................................................................................... 8 1.14 Currency of Payment ........................................................................................................................ 8 1.15 Non-Business Days ........................................................................................................................... 8 1.16 Accounting Terms ............................................................................................................................. 8 1.17 Calculations ....................................................................................................................................... 8 1.18 Schedules .......................................................................................................................................... 8

ARTICLE 2 THE DEBENTURES ............................................................................................................................. 9 2.1 Form and Terms of Debentures ......................................................................................................... 9 2.2 Execution of Debentures ................................................................................................................. 14 2.3 Certification .................................................................................................................................... 14 2.4 Issue of Global Debentures ............................................................................................................. 14 2.5 Mutilation, Loss, Theft or Destruction ............................................................................................ 15 2.6 Concerning Interest ......................................................................................................................... 15 2.7 Debentures to Rank Pari Passu ....................................................................................................... 16 2.8 Payments of Amounts Due on Maturity .......................................................................................... 16 2.9 Payment of Interest ......................................................................................................................... 16 2.10 Withholding Tax ............................................................................................................................. 17

ARTICLE 3 REGISTRATION, TRANSFER, EXCHANGE AND OWNERSHIP ............................................ 17 3.1 Fully Registered Debentures ........................................................................................................... 17 3.2 Global Debentures .......................................................................................................................... 18 3.3 Transferee Entitled to Registration ................................................................................................. 19 3.4 No Notice of Trusts ......................................................................................................................... 19 3.5 Registers Open for Inspection ......................................................................................................... 19 3.6 Exchanges of Debentures ................................................................................................................ 19 3.7 Closing of Registers ........................................................................................................................ 20 3.8 Charges for Registration, Transfer and Exchange ........................................................................... 20 3.9 Ownership of Debentures ................................................................................................................ 20

ARTICLE 4 REDEMPTION AND PURCHASE OF DEBENTURES AND CERTAIN PAYMENTS ON MATURITY ............................................................................................................................................................... 21

4.1 Applicability of Article ................................................................................................................... 21 4.2 Partial Redemption .......................................................................................................................... 21 4.3 Notice of Redemption ..................................................................................................................... 22 4.4 Debentures Due on Redemption Dates ........................................................................................... 22 4.5 Deposit of Redemption Monies or Common Shares ....................................................................... 22 4.6 Right to Repay Redemption Price in Common Shares ................................................................... 22 4.7 Failure to Surrender Debentures Called for Redemption ................................................................ 25

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4.8 Cancellation of Debentures Redeemed ........................................................................................... 25 4.9 Purchase of Debentures by the Corporation .................................................................................... 25 4.10 Deposit of Maturity Monies ............................................................................................................ 26

ARTICLE 5 SECURITY FOR DEBENTURES ..................................................................................................... 26 5.1 Security for Debentures and Negative Pledge ................................................................................. 26 5.2 Possession Before Default .............................................................................................................. 26 5.3 Delivery of Pledged Securities ........................................................................................................ 27 5.4 Security Effective Notwithstanding Date of Issue .......................................................................... 27 5.5 Registration of Security .................................................................................................................. 27 The Corporation shall: ................................................................................................................................... 27 5.6 Reservation of Last Day of Leasehold Terms ................................................................................. 28 5.7 Covenants as to Security ................................................................................................................. 28 5.8 Defeasance ...................................................................................................................................... 28 5.9 Security Subject to Applicable Agreement ..................................................................................... 29

ARTICLE 6 CONVERSION OF DEBENTURES .................................................................................................. 29 6.1 Applicability of Article ................................................................................................................... 29 6.2 Notice of Expiry of Conversion Privilege ....................................................................................... 29 6.3 Revival of Right to Convert ............