Using CNC(=O)c1cc(Br)cc([N+](=O)[O-])c1, [N-]=[N+]=[N-] to produce Cn1nnnc1-c1cc(Br)cc([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.