... A1a (i) mixture with 5-O-demethyl-25-de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (ii)CAS NO ... ·C47H70O14Molecular Weight1732.14InChIInChI=1/C48H72O14.C47H70O14/c1-11-25(2)43-28(5)17-18-47(62- ... 22-33-19-32(60-46)15-14-26(4)42(25(3)12-11-13-31-23-54- ... 49)29(7)55-37/h12-15,17-19,25-26,28,30-31,33-45,49-50,52H, ... 26+,28+,30+,31+,33-,34+,35+,36+,37+,38+,39+,40-,41+,42+,43-,44+,45-,47-,48-;25 ...