CAS No:1315481-36-7||Chemical Formula:C25H27N9O8S2||Molecular Weight:645.66600||Exact Mass:645.14240||(6R,7S)-7-((R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-(4-hydroxyphenyl)acetamido)-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid