[H]OC1=C([H])C(=C(C(OC([H])([H])[H])=C1C([H])([H])[H])C([H])([H])[C@@]([H])(C(=O)C([H])([H])[C@@]([H])(O[H])C([H])([H])[H])C([H])([H])[H])C([H])([H])[H]