[H]OC1=C([H])C(=C(C(=O)O[C@]2(C(=O)C([H])=C3C([H])=C(OC([H])([H])[C@]3([H])[C@@]2([H])O[H])C(\[H])=C(/[H])C([H])([H])[H])C([H])([H])[H])C(O[H])=C1[H])C([H])([H])[H]