[H]ON1C([H])=C([H])C(O[H])=C(C1=O)[C@]1([H])[C@@]([H])(C([H])([H])[H])C([H])([H])[C@@]([H])(C([H])([H])[H])C([H])([H])[C@]1(C([H])=C([H])[H])C([H])([H])[H]