(2013/04/13)
(4R,5S,6S)-3-[[(3S,5S)-N-(4-nitrobenzyloxycarbonyl)-5-[(4-aminosulfonylphen-1-yl)methyl]carbamoyl]-3-pyrrolidinyl]thio-6-[(R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid (4-nitrobenzyl)methyl ester
mafenide acetate
(2S,4S)-5-p-nitrobenzyloxycarbonyl-2-thia-5-azabicyclo<2.2.1>heptan-3-one