virginiamycin and its Impurities

Virginiamycin is used in the fuel ethanol industry to prevent microbial contamination and in livestock to prevent and treat infections. Virginiamycin is a streptogramin antibiotic similar to pristinamycin and quinupristin/dalfopristin. It is a combination of pristinamycin IIA and virginiamycin S1.Reference standards of Virginiamycin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.