definiens: shall mean a compound that falls into at least one of the following : ( a ) Collaboration Compounds for which Development under this Agreement is terminated during the Research Program Term, whether before or after a determination that such Collaboration Compound is a Lead Compound ; ( b ) Collaboration Compounds synthesized by or on behalf of [COMPANY] under this Agreement but never screened during the Research Program Term to determine if such Collaboration Compounds meet the Lead Compound definition ; . ( c ) Collaboration Compounds synthesized by or on behalf of [COMPANY] during the Research Program Term which are not Lead Compounds by definition ; ( d ) Lead Compounds that are not nominated as a PRDC ; or ( e ) Lead Compounds that are nominated as a PRDC, but not subsequently selected by [COMPANY] as a Licensed Compound pursuant to Section 5.3 . For purposes of clarification, a Passed Compound can not be or have been a Licensed Compound