[H]OC1=C(C2=C([H])C([H])=C(O[H])C([H])=C2[H])[C@@](OC1=O)(C(=O)OC([H])([H])[H])C([H])([H])C1=C([H])C([H])=C2OC(C([H])=C([H])C2=C1[H])(C([H])([H])[H])C([H])([H])[H]