[H]O[C@@]1([H])C(=O)N2C3=C(C([H])=C4OC([H])([H])OC4=C3[H])C3=C([H])C([H])([H])N4C([H])([H])C([H])=C([H])[C@]11C([H])([H])C([H])([H])[C@@]23[C@@]41[H]