... de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (ii)CAS NO.71751-41-2EINECS NO.265-610-3Molecular FormulaC48H72O14·C47H70O14Molecular ... -43)23-34-20-33(61-47)16-15-27(4)42(26(3)13-12-14-32-24-55- ... -24H2,1-10H3;11-14,16-18,24-25,27,29-30,32-44,48-49,51H,15,19 ... -23H2,1-10H3/b13-12+,27-15+,32-14+;12-11+,26-14+,31-13 ... +,40-,41+,42+,43-,44+,45-,47-,48-;25-,27-,29-,30-,32+,33-,34-,35-,36-,37-,38 ...