(2R,5R,6R,7R)-6,7-epoxy-2-phenyl-3-oxa-1-aza-bicyclo<3.3.0>octane-8-one

(R)-[(4R,5S)-4-(1-Ethoxy-ethoxymethyl)-2-oxo-oxazolidin-5-yl]-hydroxy-acetic acid methyl ester

(2R,3S)-N-benzyl-3-hydroxy-2-hydroxymethylpyrrolidine

(2S,5R)-4-benzoyloxy-1-tert-butoxycarbonyl-2-cyano-5-hydroxymethylpyrrolidine

(2R,3R,4R)-N-benzyl-4-(N-tert-butoxycarbonyl)amino-2,3-epoxy-5-[(1-ethoxy)ethoxy]pentanamide

(2R,3R,4R)-N-benzyloxy-4-(N-tert-butoxycarbonyl)amino-2,3-epoxy-5-[(1-ethoxy)ethoxy]pentanamide

tert-butyl (2R,3S,4R)-4-tert-butoxycarboxamido-2-tert-butyldiphenylsilyloxymethyl-3-hydroxy-pyrrolidine-1-carboxylate

(4S,5R)-4-benzoyloxy-5-(1-ethoxyethoxymethyl)pyrrolidin-2-one

tert-butyl (2R,3S,4R)-4-tert-butoxycarboxamido-3-hydroxy-2-hydroxymethylpyrrolidine-1-carboxylate

tert-butyl (2R,3R,4R)-4-azido-2-tert-butyldiphenylsilyloxymethyl-3-hydroxy-pyrrolidine-1-carboxylate

(4S,5R)-4-benzoyloxy-1-tert-butoxycarbonyl-5-(1-ethoxyethoxymethyl)-pyrrolidin-2-one

tert-butyl (2R,3R,4S)-2-tert-butyldiphenylsilyloxymethyl-3,4-epoxypyrrolidine-1-carboxylate

(2R,5R,6S)-6-benzoyloxy-2-phenyl-3-oxa-1-azabicyclo[3.3.0]octane-8-one

methyl (2R,3R,4R)-4-(N-tert-butoxycarbonyl)amino-2,3-epoxy-5-[(1-ethoxy)ethoxy]pentanoate

tert-butyl (2R,3S,4R)-4-tert-butoxycarboxamido-2-tert-butyldiphenylsilyloxymethyl-3-mesyloxy-pyrrolidine-1-carboxylate

(4S,5R)-4-benzoyloxy-5-hydroxymethylpyrrolidin-2-one

反-3-羟基-L-脯氨酸

(4S,5R)-5-azidomethyl-4-(tert-butyldiphenylsilyloxy)pyrrolidin-2-one

(2R,3S)-tert-butyl 3-hydroxy-2-(hydroxymethyl)pyrrolidine-1-carboxylate