[H]OC1=C2C(=O)C3=C(C4=C(N3C#N)[C@@]([H])(OC(=O)C([H])([H])[H])[C@](OC(=O)C([H])(C([H])([H])[H])C([H])([H])[H])(C([H])([H])[H])[C@]([H])(OC(=O)C([H])([H])[H])[C@@]4([H])OC(=O)C([H])([H])[H])C(=O)C2=C([H])C([H])=C1[H]