definiens: shall mean : [ * * * ] ; ( c ) any other compound, the manufacture, use or sale ofwhich is claimed generically or specifically in any of the patents and patent applications listed onExhibit D, and ( d ) any and all pharmaceutically active derivatives of any compound described inclause ( a ), clause ( b ) or clause ( c ) above, including, any prodrug, metabolite, ester, salt, hydrate, solvate, polymorph, isomer or enantiomer thereof, including compositions containing suchcompound, prodrug or metabolites, or esters, salts, hydrates, solvates, polymorphs, isomers orenantiomers of any compound described in clause ( a ), clause ( b ) or clause ( c ) above, whetherexisting on the Closing Date or generated or synthesized by or on behalf of Purchaser or any ofits Affiliates or licensees after the Closing