1,2-Pyrrolidinedicarboxylic acid, 4-phenyl-, 1-(1,1-dimethylethyl) ester, (2S,4S)-
1,2-Pyrrolidinedicarboxylic acid, 4-phenyl-, 1-(1,1-dimethylethyl) ester, (2S-trans)-
1-(1,1-Dimethylethyl) (2S,4S)-4-phenyl-1,2-pyrrolidinedicarboxylate
(2S,4S)-1-(tert-Butoxycarbonyl)-4-phenylpyrrolidine-2-carboxylic acid