[H]C1=C([H])N(C(=N1)C([H])([H])[H])C([H])([H])C1([H])C(=O)C2=C(N(C3=C([H])C(O)=C([H])C([H])=C23)C([H])([H])[H])C([H])([H])C1([H])[H]