CAS No:64953-12-4 ||Chemical Formula:C20H18N6Na2O9S||Molecular Weight:564.43654||Exact Mass:564.06514 ||sodium (6R,7R)-7-(2-carboxylato-2-(4-hydroxyphenyl)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate