Using [N-]=[N+]=[N-], CNC(=O)c1ccc([N+](=O)[O-])c(OC)c1 to produce COc1cc(-c2nnnn2C)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.