Using [N-]=[N+]=[N-], CCOC(=O)c1cc(-c2ccc(Cl)cc2)n(-c2ccc(N)cc2)c1C to produce CCOC(=O)c1cc(-c2ccc(Cl)cc2)n(-c2ccc(N=[N+]=[N-])cc2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.