Using [N-]=[N+]=Nc1ccc(N)cc1, COc1cc2ncnc(Cl)c2cc1OC to produce COc1cc2ncnc(Nc3ccc(N=[N+]=[N-])cc3)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.