(1R,5R,6S,8R,3'S,5'S)-2-{5'-[(E)-2-(3-allyloxycarbonyl-5-isoxazolo)ethenyl]-1-allyloxycarbonylpyrrolidin-3'-ylthio}-6-(1-hydroxyethyl)-1-methylcarbapen-2-em-3 -carboxylate

(4R,5S,6S)-3-{(3S,5S)-1-Allyloxycarbonyl-5-[(E)-2-(5-allyloxycarbonyl-isoxazol-3-yl)-vinyl]-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

allyl (4R,5S,6S)-3-(((3S,5S)-1-((allyloxy)carbonyl)-5-(((tert-butoxycarbonyl)(sulfamoyl)amino)methyl)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)-6-((R)-1-Hydroxy-ethyl)-3-{(3S,5S)-5-[(Z)-2-(3-hydroxymethyl-isoxazol-5-yl)-vinyl]-pyrrolidin-3-ylsulfanyl}-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

(4R,5S,6S)-6-((R)-1-Hydroxy-ethyl)-3-{(3S,5S)-5-[(E)-2-(3-hydroxymethyl-isoxazol-5-yl)-vinyl]-pyrrolidin-3-ylsulfanyl}-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid