Cefaclor EP Impurity G Sodium salt

Chemical Name: (2R,6R,7R)- and (2S,6R,7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-methylene-8-oxo-5-thia-1-azabicyclo[4.2.0]octane-2-carboxylic acid Sodium salt (as per EP)

Smile: O=C1N(C([H])([C@@H]1NC([C@H](N)C2=CC=CC=C2)=O)SCC3=C)C3C(O)=O.[Na]