CAS No:65243-33-6||Chemical Formula:C20H25N5O7S2||Molecular Weight:511.56800||Exact Mass:511.11954||(pivaloyloxy)methyl (6R,7R)-7-((Z)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate