[H]OC1=C([H])C([H])=C(\C([H])=C(/[H])C(=O)C([H])([H])C(=O)C(\[H])=C(/[H])C2=C([H])C([H])=C(O[H])C(OC([H])([H])[H])=C2[H])C([H])=C1O