头孢克洛杂质B(EP)
Product Name: Cefaclor Impurity B(EP),7-ACCA
Catalog No: PI00035001
CAS No:  53994-69-7
Chemical Formula: C7H7ClN2O3S
(6R,7R)-7-amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid