[H]OC1=C([H])C(O[H])=C(C(=O)C([H])([H])C([H])([H])C([H])([H])C(\[H])=C(\[H])C([H])([H])C(\[H])=C(\[H])C([H])([H])C(\[H])=C(\[H])/C(/[H])=C(\[H])[C@]([H])(O[H])C([H])([H])C(\[H])=C(\[H])C([H])([H])C([H])([H])[H])C(O[H])=C1[H]