Cefepime EP Impurity B

Chemical Name: (6R,7R)-7-[[(2Z)-[2-[[(2Z)-(2-Aminothiazol-4-yl)-(methoxyimino)acetyl] amino] thiazol-4-yl](methoxyimino)-acetyl]amino]-3-[(1-methylpyrrolidinio) methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate (as per EP); 1-({(6R,7R)-7-[(Z)-2-{2-[(Z)-2-(2-Aminothiazol-4-yl)-2-(methoxyimino)acetamido]thiazol-4-yl}-2-(methoxyimino)acetamido]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl}methyl)-1-methylpyrrolidinium (as per USP)

Smile: O=C(C(N12)=C(C[N+]3(C)CCCC3)CS[C@]2([H])[C@H](NC(/C(C4=CSC(NC(/C(C5=CSC(N)=N5)=N\OC)=O)=N4)=N\OC)=O)C1=O)[O-]