PHB02: Phenylbutazone EP Impurity B

Phenylbutazone 4-Hydroxy ;

4-Butyl-4-hydroxy-1,2-diphenylpyrazolidine-3,5-dione ;

CAS # 16860-43-8 ;

C19H20N2O3 ;
Mol. Wt.: 324.37 ;