[(2,2-Dimethylpropanoyl)oxy]methyl (4R,5S,6S)-6-[(1R)-1-hydroxyet hyl]-4-methyl-7-oxo-3-{[(3R)-5-oxo-3-pyrrolidinyl]sulfanyl}-1-aza bicyclo[3.2.0]hept-2-ene-2-carboxylate

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

(pivaloyloxy)methyl (4R,5S,6S)-4-methyl-7-oxo-3-(((R)-5-oxo-1-(triethylsilyl)pyrrolidin-3-yl)thio)-6-((R)-1-((triethylsilyl)oxy)ethyl)-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

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

(4R,5S,6S)-4-Methyl-7-oxo-3-((R)-5-oxo-1-triethylsilanyl-pyrrolidin-3-ylsulfanyl)-6-((R)-1-trimethylsilanyloxy-ethyl)-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2,2-dimethyl-propionyloxymethyl ester

(pivaloyloxy)methyl (1R,5S,6S)-1-methyl-2-[(R)-2-oxo-1-pyrrolidin-4-ylthio]-6-[(R)-1-(trifluoromethylsilyloxy)ethyl]-1-carbapen-2-em-3-carboxylate

(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

(4R,5R,6S)-6-[(1R)-1-trimethylsilyloxyethyl]-3-diphenylphosphoryloxy-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid pivaloyloxymethyl ester

特戊酸碘甲酯

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

(R)-4-巯基-2-吡咯烷酮