Using C[O-], O=[N+]([O-])c1c(Cl)cc(N2CCOCC2)nc1Cl to produce COc1nc(N2CCOCC2)cc(Cl)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.