(R)-4-amino-2-chlorobutyric acid

苄基(2S)-1-[(1S)-1-苯基乙基]-2-吖丁啶羧酸酯

(2S)-1-benzoylazetidine-2-carboxylic acid

(2S,1'S)-1-(1'-methyl)benzylazetidine-2-carboxylic acid

dimethyl (1'S)-1-(1'-methyl)benzylazetidine-2,2-dicarboxylate