最佳答案
回答者：网友
O=C1C([H])([H])C([H])([H])[C@@]2(C([H])([H])[H])[C@]([H])(C1(C([H])([H])[H])C([H])([H])[H])C([H])([H])C([H])([H])[C@@]1(C([H])([H])[H])[C@]3(C([H])([H])[H])C([H])([H])C([H])([H])[C@@]4(C(=O)O[H])C([H])([H])C([H])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[C@@]4([H])C3=C([H])C([H])([H])[C@@]12[H]
