[H]OC([H])([H])[C@@]1([H])C(=C([H])[H])C([H])([H])C([H])([H])[C@@]2([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])C([H])([H])[C@@]([H])(O[H])[C@]12C([H])([H])[H]