最佳答案
回答者：网友
O(C([H])(C1C([H])=C([H])C([H])=C([H])C=1[H])C1C([H])=C([H])C([H])=C([H])C=1[H])C1([H])C([H])([H])C([H])([H])N(C([H])([H])C([H])([H])C([H])([H])C(C2C([H])=C([H])C(=C([H])C=2[H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H])=O)C([H])([H])C1([H])[H]
