特戊酸碘甲酯

(3S,4S)-3-[(R)-1-hydroxyethyl]-4-[(R)-1-[[(R)-2-oxopyrrolidin-4-ylthio]carbonyl]ethyl]-2-azetidinone

(3S,4S)-4-[(R)-1-[[(R)-2-oxopyrrolidin-4-ylthio]carbonyl]ethyl]-1-[[(pivaloyloxy)methyloxy]oxalyl]-3-[(R)-1-(trimethylsilyloxy)ethyl]-2-azetidinone

(2-(diethoxy(ethyl)-l⁵-phosphanylidene)-2-((3S,4S)-2-oxo-4-((R)-1-oxo-1-(((R)-5-oxopyrrolidin-3-yl)thio)propan-2-yl)-3-((R)-1-((trimethylsilyl)oxy)ethyl)azetidin-1-yl)acetoxy)methyl pivalate