allyl (4R,5S,6S)-3-(((3S,5S)-1-((allyloxy)carbonyl)-5-(2-(ethylsulfonamido)-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

allyl (4R,5S,6S)-3-(((3S,5S)-1-((allyloxy)carbonyl)-5-(1-(methoxyimino)-2-((N-propylsulfamoyl)amino)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-[1-(methoxyimino)-2-(carbamoyaminol)ethyl]-4-tritylthio-1-(allyloxycarbonyl)pyrrolidine

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

(4R,5S,6S)-3-((3S,5S)-1-Allyloxycarbonyl-5-{1-[(E)-methoxyimino]-2-nitro-ethyl}-pyrrolidin-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester