CAS No:97164-57-3 (free base); 149261-27-8 (carboxylic acid)||Chemical Formula:C19H24N6O5S2||Molecular Weight:480.55800||Exact Mass:480.12496||(6R,7R)-7-((E)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido)-3-((1-methylpyrrolidin-1-ium-1-yl)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate