2-(4-BOC-PIPERAZINYL)-2-(2-CYANO-PHENYL)ACETIC ACID ALPHA-(4-BOC-PIPERAZINYL)-ALPHA-(2-CYANOPHENYL)ACETIC ACID 2-(4-(Tert-Butoxy)Carbonyl piperazinyl)-Alpha-(2-cyano-phenyl)acetic acid 2-{4-[(tert-butoxy)carbonyl]piperazin-1-yl}-2-(2-cyanophenyl)acetic acid 1-Piperazineacetic acid, α-(2-cyanophenyl)-4-[(1,1-dimethylethoxy)carbonyl]- 2-(4-Boc-piperazinyl)-α-(2-cyano-phenyl)acetic acid 2-[4-(t-Butoxycarbonyl)piperazinyl]-2-(2-cyanophenyl)acetic acid a-(2-Cyanophenyl)-4-Boc-1-piperazineacetic acid