[H]OC1=C([H])C(O[H])=C2C(=O)C3=C(C(=O)C4=C(C3=O)C(=C([H])C(OC([H])([H])[H])=C4[H])C3=C(C([H])=C(OC([H])([H])[H])C(Cl)=C3OC([H])([H])[H])C([H])([H])[H])C(C2=C1[H])(C([H])([H])[H])C([H])([H])[H]