(2R,4R)-4-氨基-2,4-吡咯烷二甲酸

(2R,4r)-1-苄基-4-氨基-吡咯烷-2,4-二羧酸

(2R,4S)-4-Amino-1-benzyl-pyrrolidine-2,4-dicarboxylic acid diethyl ester

(2R,4S)-1-benzyl-2-ethoxycarbonylpyrrolidine-4-spiro-5'-hydantoin

(2R,4S)-1-Benzyl-4-tert-butoxycarbonylamino-pyrrolidine-2,4-dicarboxylic acid diethyl ester