(S)-tert-Butyl 4-oxo-2-(thiazolidine-3-carbonyl)pyrrolidine-1-carboxylate

(2S)-4-Oxo-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylic acid tert-butyl ester

1-Pyrrolidinecarboxylic acid, 4-oxo-2-(3-thiazolidinylcarbonyl)-,1,1-dimethylethyl ester, (2S)-

3-((S)-1-tert-butoxycarbonyl-4-oxo-2-pyrrolidinylcarbonyl)-1,3-thiazolidine