(4S)-4-(Difluoromethyl)-1-{[(2-methyl-2-propanyl)oxy]carbonyl}-L- proline

(2S)-n-boc-顺式-4-溴-l-脯氨酸叔丁酯

methyl 1-benzoylpyrrolidine-2-carboxylate

1-丁基吡咯

1-叔丁氧羰基-(4R)-羟基-2-脯氨酸乙脂