[H]OC1=C([H])C([H])=C2C(N([H])C(=C2C([H])([H])[C@]2([H])N([H])C(=O)[C@@]3([H])N(C2=O)C([H])([H])C([H])([H])C3([H])[H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H])=C1[H]