(2S,5R,6R)-3,3-DiMethyl-6-((R)-2-(3-(3-(Methylsulfonyl)-2-oxoiMidazolidine-1-carbonyl)ureido)-2-phenylacetaMido)-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, sodiuM salt Chebi:52067 Sodium (2S,5R,6R)-3,3-dimethyl-6-{[(2R)-2-({[3-(methylsulfonyl)-2-oxoimidazolidin-1-yl]carbonyl}amino)-2-phenylacetyl]amino}-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate Sodium 6beta-{(2R)-2-[3-(methanesulfonyl)-2-oxoimidazolidine-1-carboxamido]-2-phenylacetamido}-2,2-dimethylpenam-3alpha-carboxylate Sodium 6beta-{(2R)-2-[3-(methanesulfonyl)-2-oxoimidazolidine-1-carboxamido]-2-phenylacetamido}penicillanate Mezlocillin Sodium (350 mg) sodium 3,3-dimethyl-6-[[2-[[(3-methylsulfonyl-2-oxo-1-imidazolidinyl)-oxomethyl]amino]-1-oxo-2-phenylethyl]amino]-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 3,3-dimethyl-6-[[2-[(3-methylsulfonyl-2-oxo-imidazolidin-1-yl)carbonylamino]-2-phenyl-acetyl]amino]-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid sodium salt