Avermectin B1

Chemical Name: 5-O-Demethylavermectin A1a (> 80%) and 5-O-demethyl-25-de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (< 20%)

Smile: O=C(O[C@]1([H])C2)[C@]([C@]/34O)([H])C=C(C)[C@@H](O)[C@@]4([H])OCC3=C/C=C/[C@H](C)[C@@H](O[C@@H]5O[C@@H](C)C(O[C@@H]6O[C@@H](C)[C@H](O)[C@@H](OC)C6)[C@@H](OC)C5)/C(C)=C/C[C@@](C1)([H])O[C@]72C=C[C@H](C)[C@@H]([C@H](CC)C)O7