Ceftazidime EP Impurity E

Chemical Name: (6R,7R)-7-[[(2Z)-2-(2-aminothiazol-4-yl)-2-[[2-(1,1-dimethylethoxy)-1,1-dimethyl-2-oxoethoxy]imino]acetyl]amino]-8-oxo-3-[(pyridin-1-ium-1-yl)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate (as per EP)

Synonym: 1,​2,​3-​Propanetriol, 2-​(2,​4-​difluorophenyl)​-; 2-(2,4-Difluorophenyl)-1,2,3-propanetriol;

Smile: O=C(C(N12)=C(C[N+]3=CC=CC=C3)CS[C@]2([H])[C@H](NC(/C(C4=CSC(N)=N4)=N\OC(C)(C)C(OC(C)(C)C)=O)=O)C1=O)[O-]