CefepiMe interMediate (7-PIME);1-[[(6R,7R)-7-AMino-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]Methyl]-1-MethylpyrrolidiniuM Chloride;CefepiMe Related CoMpound E;Cefepime Related Compound E (20 mg) (1-{[(6R,7R)-7-Amino-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl}-1-methylpyrrolidin-1-ium chloride);Cefepime EP Impurity E;Cefepime EP Impurity E HCl;(6R,7R)-7-Amino-3-[(1-methyl-1-pyrrolidiniumyl)methyl]-8-oxo-5-th ia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate hydrochloride (1:1);(6R,7R)-7-Amino-3-[(1-methyl-1-pyrrolidiniumyl)methyl]-8-oxo-5-th ia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate hydrochloride (1:1)