Synonyms5-O-Demethyl-28-oxo-Avermectin A1a; Spiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2-[2H]pyran] Close 5-O-Demethyl-28-oxo-Avermectin A1a; Spiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2-[2H]pyran] Related products 8a-Oxo Avermectin B1a M.F. M.W. 887.07 CAT# AR-I02913 CAS# 102190-68-1