(R)-4-硝基苄基-2-重氮-4-((2R,3S)-3-((R)-1-羟乙基)-氮杂环丁-4-酮-2-基]-3-氧代戊酸酯

(3S,4R)-3-((1R)-1-((tert-Butyldimethylsilyl)oxy)ethyl)-4-((1R)-1-methyl-3-(p-nitrobenzyloxycarbonyl)-2-oxopropyl)azetidin-2-one

Mg(mono-PNB malonate)2

2-Azetidinebutanoic acid, 3-[(1R)-1-hydroxyethyl]-γ-methyl-β,4-dioxo-, (4-nitrophenyl)methyl ester, (γR,2R,3S)-

(3S,4S)-1-(tert-butoxycarbonylmethyl)-3-[(1R)-1-tert-butyldimethylsilyloxyethyl]-4-[(1R)-1-carboxyethyl]-2-azetidinone