[H]OC1=C([H])C([H])=C(C([H])=C1[H])C1=C(OC([H])([H])[H])C(O[H])=C(C(OC([H])([H])[H])=C1[H])C1=C([H])C([H])=C(O[H])C([H])=C1[H]