(2aE,4E,8E)-(5'S,6S,6'R,7S,11R,13R,15S,17aR,20R,20aR,20bS)-3',4',5',6,6',7,10,11,14,15,17a,20,20a,20b-Tetradecahydro-20,20b-dihydroxy-6'-isopropyl-5',6,8,19-tetramethyl-17-oxospiro(11,15-methano-2H,13H,17H-furo(4,3,2-pq)(2,6)benzodioxacyclooctadecin-13,2'-(2H)pyran)-7-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-alpha-L-arabino-hexopyranosyl)-3-O-methyl-alpha-L-arabino-hexopyran 70209-81-3 Avermectin A(sub 1a), 5-O-demethyl-25-de(1-methylpropyl)-22,23-dihydro-25-(1-methylethyl)- Avermectin A1a, 5-O-demethyl-25-de(1-methylpropyl)-22,23-dihydro-25-(1-methylethyl)- Avermectin H2B1b EINECS 274-384-5 Ivermectin [Mixture component B1b) and (component B1a with additional -CH3; CAS 70288-86-7) Ivermectin component B(sub 1b)