[H]C([H])=C(C([H])([H])[H])[C@@]1([H])C([H])([H])C([H])([H])[C@]2(C([H])([H])[H])[C@]1([H])C([H])([H])C([H])([H])[C@@]1(C([H])([H])[H])[C@@]2([H])C([H])([H])C([H])([H])[C@@]2([H])[C@@]3(C([H])([H])[H])C([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])(C([H])([H])[H])[C@]3([H])C([H])([H])C([H])([H])[C@]12C([H])([H])[H]