Cefpodoxime CPDP Sulfoxide 1,2 Impurity

Chemical Name: 1-((Isopropoxycarbonyl)oxy)ethyl (6R,7R)-7-((Z)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido)-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide

Smile: O=C(C(N12)=C(COC)CS[C@]2([H])[C@H](NC(/C(C3=CSC(N)=N3)=N\OC)=O)C1=O)[O-].[Ca+]