4-(二氟亚甲基)-L-脯氨酸甲酯

(4S)-4-羟基-L-脯氨酸甲酯

(2S,4R)-1-(tert-Butoxycarbonyl)-4-methoxypyrrolidine-2-carboxylic acid

(S)-1-(叔丁氧基羰基)-2-甲基-4-亚甲基吡咯烷-2-羧酸

methyl 1N-tert-butoxycarbonyl-4-exomethylene-pyrrolidine-(2R)-carboxylate