eprinomectin and its Impurities
Eprinomectin is used as a veterinary topical endectocide. It is a mixture of two chemical compounds, eprinomectin B1a and B1b. It is an avermectin.. Reference standards of Eprinomectin API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


Avermectin A1a, 4′′-(acetylamino)-5-O-demethyl-4′′-deoxy-22,23-dihydro-23-hydroxy-, (4′′R,23S)
Avermectin A1a, 4''-(acetylamino)-5-O-demethyl-4''-deoxy-22,23-dihydro-23-hydroxy-, (4''R,23S)
Catalogue No.:PA 05 0881001
CAS :
172842-97-6
Molecular Formula : C50H77NO15
Molecular Weight : 932.16