Synonyms: 1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid,3-[[5-[[(aminosulfonyl)amino]methyl]-3-pyrrolidinyl]thio]-6-(1-hydroxyethyl)-4-methyl-7-oxo-,[4R-[3(3S*,5S*),4a,5b,6b(R*)]]-;Doribax;1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid,3-[[(3S,5S)-5-[[(aminosulfonyl)amino]methyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-,(4R,5S,6S)-;S 4661;