(2S,4S)-2-(tert-butoxycarbonyl)amino-4-bromomethyl-γ-butyrolactone

(2S,4R)-2-tert-butoxycarbonylamino-4-hydroxymethyl-4-butanolide

(2S,4S)-2-(tert-butoxycarbonyl)amino-3,4-epoxypentanoic acid methyl ester

(2R,5S,7R)-2-(tert-butyl)-4-oxo-3-oxa-1-azabicyclo[3.3.0]oct-7-yl acetate

N-Boc-反式-4-羟基-L-脯氨酸甲酯