(2S,4S)-2-(4-Hydroxyimino-piperidine-1-carbonyl)-4-tritylsulfanyl-pyrrolidine-1-carboxylic acid allyl ester

allyl (4R,5S,6S)-3-(((3S,5S)-1-((allyloxy)carbonyl)-5-(2-(dimethylamino)-1-(methoxyimino)ethyl)pyrrolidin-3-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

(2S,4S)-2-[(4-hydroxyimino-3-ethoxycarbonylpyrrolidinyl)carbonyl]-4-tritylthio-1-(allyloxycarbonyl)pyrrolidine

(2S,4S)-2-(2-Carbamoyl-1-hydroxy-ethyl)-4-tritylsulfanyl-pyrrolidine-1-carboxylic acid allyl ester

allyl (4R,5S,6S)-3-(((3S,5S)-5-(2-acetamido-1-(methoxyimino)ethyl)-1-((allyloxy)carbonyl)pyrrolidin-3-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate