[H]OC1=C(C2=C(C([H])=C1[H])C([H])([H])[C@@](O[H])(C([H])([H])[H])C([H])([H])C2=O)[C@]1([H])O[C@]([H])(OC([H])([H])[H])C2=C1C([H])=C([H])C([H])=C2OC([H])([H])[H]