N-(benzyloxycarbonyl)-cis-4-carboxy-L-proline dimethyl ester

1-苄甲氧羰基-(4R)-羟基-2-脯氨酸乙脂

N-(benzyloxycarbonyl)-cis-4-cyano-L-proline ethyl ester

(2R, 4r)-4-(甲苯-4-磺酰氧基)-1-[苄氧基羰基]-吡咯烷-2-羧酸乙酯

氯甲酸苄酯