[H]OC(=O)C(\[H])=C(/[H])C1=C([H])C2=C(C(=O)[C@](OC(=O)C3=C(O[H])C([H])=C(O[H])C([H])=C3C([H])([H])[H])(C([H])([H])[H])[C@]([H])(O[H])C2([H])[H])C([H])([H])O1