definiens: means ( a ) any compound identified in Exhibit B, ( b ) any other compounddiscovered or developed by each Party alone or jointly with the other Party under the existing MTA or in performanceof the Work Plan, and ( c ) any other compound owned or controlled by Licensor or its Affiliates as of the Effective Dateof this Agreement or discovered, developed, in - licensed or otherwise acquired by Licensor or its Affiliates ( excludingfor clarity, with respect to this sub - clause ( c ), a Third Party that acquires control ( as defined in Section 1.1 ) ofLicensor, whether by merger, acquisition or sale of assets ) during the period commencing on the Effective Date andending [ * ] ( [ * ] ) years after Licensor has completed the activities ascribed to Licensor under the Work Plan, each ofwhich compound is designed to inhibit Chk 1 or is a Qualified Compound and in relation to each of ( a ), ( b ), and ( c ) anyderivative, salt, enantiomer, isomer, solvate, ester, prodrug or metabolite of the foregoing