Cefoxitin EP Impurity A

Chemical Name: cyclohexanaminium (6R,7S)-3-(hydroxymethyl)-7-methoxy-8-oxo-7-[[(thiophen-2-yl)acetyl]amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate (as per EP)

Smile: O=C([C@@]1(OC)NC(CC2=CC=CS2)=O)N3[C@]1([H])SCC(CO)=C3C([O-])=O.[NH3+]C4CCCCC4