allyl (1R,5R,6S)-2-phenyl-6-<(1R)-1-hydroxyethyl>-1-methylcarbapen-2-em-3-carboxylate

(3S,4S)-3-[(R)-1-(叔丁基二甲基硅氧基)乙基]-4-[(R)-1-羰乙基]-2-氮杂环丁酮

allyl (1R,5R,6S)-2-phenyl-6-<(1R)-1-<(tert-butyldimethylsilyl)oxy>ethyl>-1-methylcarbapen-2-em-3-carboxylate

(3S,4R)-1-<<(allyloxy)carbonyl>(triphenylphosphoranylidene)methyl>-3-<(1R)-1-<(tert-butyldimethylsilyl)oxy>ethyl>-4-<(1R)-1-(phenylcarbonyl)ethyl>azetidin-2-one

(3S,4R)-1-<<(allyloxy)carbonyl>(triphenylphosphoranylidene)methyl>-3-<(1R)-1-<(tert-butyldimethylsilyl)oxy>ethyl>-4-<(1R)-2'-<(pyridylthio)carbonyl>ethyl>azetidin-2-one