Using CCOC(=O)c1ccc2cc(Cl)ccn2c1=O, [N-]=[N+]=[N-] to produce CCOC(=O)c1ccc2cc(N=[N+]=[N-])ccn2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.