CAS No:153832-38-3||Chemical Formula:C22H23N3Na2O7S||Molecular Weight:519.47954||Exact Mass: 519.10521||(4R,5S,6S)-3-[[(3S,5S)-5-[[(3-Carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt