[H]OC1=C2C(=O)C3=C(C([H])=C4O[C@@]5([H])OC([H])([H])C([H])([H])[C@@]5([H])C4=C3O[H])C(=O)C2=C([H])C(O[C@]2([H])O[C@@]([H])([C@]([H])(O[H])C([H])([H])O[H])[C@]([H])(O[H])[C@@]2([H])O[H])=C1[H]