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