definiens: means : ( a ) any Terminated Compound that is not a Terminated AZCompound or any Unexercised Option Compound, in each case for which a Major Metabolite ( i ) is a CollaborationCompound or Candidate Drug, ( ii ) is an Additional Compound with respect to a Collaboration Compound or CandidateDrug or ( iii ) is the same as a Major Metabolite of ( A ) a Collaboration Compound, ( B ) a Candidate Drug ( other than aLicensed Derivative ) or ( C ) to the extent Known by [COMPANY], a Licensed Derivative or an Additional Compound withrespect to a Collaboration Compound or a Candidate Drug, in each case ( ( A ), ( B ) and ( C ) ) that satisfies Section 1.9(a)(iii ), 1.9(b)(iii ), 1.9(c)(iii ) or 1.9(d)(iii ), whichever is applicable to the Terminated Compound or Unexercised OptionCompound, as applicable ; ( b ) any metabolite of any Terminated AZ Compound, any Partially - Terminated Product or [ * * * * * * * * ], [ * * * * * * * * ] or [ * * * * * * * * ] that ( i ) is a Collaboration Compound or Candidate Drug, ( ii ) is an Additional Compoundwith respect to a Collaboration Compound or Candidate Drug or ( iii ) is the same as a Major Metabolite of ( A ) aCollaboration Compound, ( B ) a Candidate Drug ( other than a Licensed Derivative ) or ( C ) to the extent Known byTargacept, a Licensed Derivative or an Additional Compound with respect to a Collaboration Compound or a CandidateDrug, in each case ( ( A ), ( B ) and ( C ) ) that satisfies Section 1.9(a)(iii ), 1.9(b)(iii ), 1.9(c)(iii ) or 1.9(d)(iii ), whichever isapplicable to the Terminated AZ Compound, Partially - Terminated Product or [ * * * * * * * * ], [ * * * * * * * * ] or [ * * * * * * * * ], asapplicable ; and ( c ) any Prodrug of an Unexercised Option Compound that is made, developed or conceived by or onbehalf of [COMPANY] prior to Initiation of a Phase II Clinical Trial of such Unexercised Option Compound . For purposesof clarity, the [ * * * * * * * * ], which is known by [COMPANY] as of the Execution Date as [ * * * * * * * * ], shall not be an ExcludedZone Compound