[H]C1=C2[C@]3([H])C([H])([H])C([H])([H])[C@]([H])(C([H])(C([H])([H])[H])C([H])([H])[H])[C@@]3(C([H])([H])[H])C([H])([H])C([H])([H])[C@@]2(C([H])([H])[H])[C@]2(C([H])([H])[H])C([H])([H])C([H])([H])[C@@]3([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])C([H])([H])C([H])([H])[C@]3(C([H])([H])[H])[C@@]2([H])C1([H])[H]