CAS No:75007-70-4||Chemical Formula:C19H20N6O7S||Molecular Weight:
476.46400||Exact Mass:476.11140||(6R,7R)-7-(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-carboxylic acid