(R)-β-(Cbz-氨基)-γ-丁内酯

二甲胺

(S)-Cbz-3-氨基-Y-丁内酯

N-[(3R)-四氢-2,5-二氧代-3-呋喃基]氨基甲酸苄酯

(R)-3-(benzyloxycarbonylamino)-4-hydroxybutanoic acid