1-Cbz-4-氨甲基哌啶

N-苄氧羰基-O-苄基-L-丝氨酸

benzyl 4-acetylbenzoate

叔-丁基-(2S,4R)-N?-(苄氧羰基)-N?-苄氧羰基)-4-羟基鸟氨酸酯

1-Benzyl 2-methyl (2S)-5-oxo-1,2-pyrrolidinedicarboxylate