CAS No:N/A||Chemical Formula:C18H18N6O9S3||Molecular Weight:558.02974||Exact Mass:558.56532||(6R,7R)-7-((R)-2-hydroxy-2-phenylacetamido)-8-oxo-3-(((1-(sulfomethyl)-1H-tetrazol-5-yl)thio)methyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5-oxide