[H]OC1=C2C(=O)C3=C(C([H])=C(C([H])=C3OC([H])([H])[H])C([H])([H])[H])C(=O)C2=C([H])C(O[C@@]2([H])O[C@]([H])(C([H])([H])O[H])[C@@]([H])(O[H])[C@@]2([H])O[H])=C1[H]