(S)-1-N-苄氧羰基-2-氰基吡咯烷

(2S)-2-(1H-tetrazol-5-yl)-pyrrolidine-1-carboxylic acid benzyl ester

(S)-2-(1H-tetrazol-5-yl)pyrrolydine-1-carboxylic acid tert-butyl ester

Cbz-L-脯氨酸酰胺

N-苄氧羰基-L-脯氨酸