3-O-Demethyl Ivermectin B1a

Smile: [H]C(C)(/C=C/C=C(CO1)/[C@]2(O)[C@]1([C@@]([H])(C(C)=C[C@]2(C3=O)[H])O)[H])[C@](/C(C)=C/C[C@@]4(C[C@@]([H])(C[C@]5(O4)O[C@@]([C@]([H])(CC5)C)([C@@](CC)([H])C)[H])O3)[H])([H])O[C@@H]6O[C@H](C)[C@H](O[C@@H]7O[C@@H](C)[C@H](O)[C@H](OC)C7)C(O)C6