(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

butyl (2R,4R)-4-diphenylphosphanyl-2-(diphenylphosphanylmethyl)pyrrolidine-1-carboxylate

(2R,4S)-4-羟基-2-(羟甲基)-1-吡咯烷羧酸叔丁酯