[H]OC1=C([H])C(OC([H])([H])[H])=C(C([H])=C1OC([H])([H])[H])C1=C([H])C([H])=C2C([H])=C3OC([H])([H])OC3=C([H])C2=C1N(C([H])=O)C([H])([H])[H]