Using CC(=O)c1cccc(Cc2nc(C(=O)Cl)co2)c1, [N-]=[N+]=[N-] to produce CC(=O)c1cccc(Cc2nc(C(=O)N=[N+]=[N-])co2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.