CAS No:34444-01-4||Chemical Formula:C18H17N6NaO5S2||Molecular Weight:484.48077||Exact Mass:484.05995 ||sodium (6R,7R)-7-((R)-2-hydroxy-2-phenylacetamido)-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate