[H]OC(=O)C(=C(\[H])C(=O)C1=C([H])C(O[H])=C([H])C([H])=C1O[H])\C([H])([H])C([H])([H])C(\[H])=C(/C([H])([H])O[H])C([H])([H])C([H])([H])C(\[H])=C(/C([H])([H])[H])C([H])([H])O[H]