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)