Ceftazidime EP Impurity A

Chemical Name: (2R,6R,7R)-7-((Z)-2-(2-aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylate (As per EP) ; (6R,7R)-7-((Z)-2-(2-aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylate (as per USP)

Smile: O=C(C(C(C[N+]1=CC=CC=C1)=CS[C@]2([H])[C@@H]3NC(/C(C4=CSC(N)=N4)=N\OC(C)(C(O)=O)C)=O)N2C3=O)[O-]