二碳酸二叔丁酯

1-O-benzyl 2-O-methyl (2R,4S)-4-hydroxypiperidine-1,2-dicarboxylate

甲基(2R,4S)-4-羟基-2-哌啶羧酸酯

N-Cbz-D-烯丙基甘氨酸

(R)-methyl 2-[N-(benzyloxycarbonyl)amino]-4-pentenoate