[H]O[C@@]1([H])C([H])([H])C([H])([H])[C@@]2(C([H])([H])[H])[C@@]([H])(C([H])([H])C([H])([H])[C@@]3(C([H])([H])[H])[C@@]2([H])C([H])([H])C([H])([H])[C@@]2([H])[C@@]([H])(C(=C([H])[H])C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H])C([H])([H])C([H])([H])[C@]32C([H])([H])[H])C1(C([H])([H])[H])C([H])([H])[H]