for the following products
(6R,7R)-7-Amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 7-Amino-3-chloro cephalosporanic acid | 7-Amino-3-chloro-8-oxo-5-thia-1-aza-bicyclo-[4.2.0]oct-2-ene-2-carboxylic acid | Cefaclor EP Impurity B and 7-Amino-3-chloro-3-cephem-4-carboxylic acid
