Cefazolin EP Impurity H ;

Cefoperazone EP Impurity E ;

7-Aminocephalosporanic Acid ("7-ACA") ;

(6R,7R)-3-[(Acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ;

CAS # 957-68-6 ;

C10H12N2O5S ;

MW: 272.28 ;