1-Pyrrolidinecarboxylic acid, 2-[[(aminosulfonyl)[(1,1-dimethylethoxy)carbonyl]amino]methyl]-4-mercapto-, 1,1-dimethylethyl ester, (2S,4S)-
1-Pyrrolidinecarboxylic acid, 2-[[(aminosulfonyl)[(1,1-dimethylethoxy)carbonyl]amino]methyl]-4-mercapto-, 1,1-dimethylethyl ester, (2S-cis)-
1,1-Dimethylethyl (2S,4S)-2-[[(aminosulfonyl)[(1,1-dimethylethoxy)carbonyl]amino]methyl]-4-mercapto-1-pyrrolidinecarboxylate