[H]C(=C(C([H])([H])[H])C([H])([H])[H])C([H])([H])C([H])([H])C(=C([H])C([H])([H])C([H])([H])C(=C([H])C([H])([H])C([H])([H])C(=C([H])C([H])([H])C([H])([H])C(=C([H])C([H])([H])C([H])([H])C(=C([H])C([H])([H])C1=C([H])C(=O)C([H])=C(OC([H])([H])[H])C1=O)C([H])([H])[H])C([H])([H])[H])C([H])([H])[H])C([H])([H])[H])C([H])([H])[H]