Using [N-]=[N+]=[N-], CC(=O)Oc1ccc(C=CC(=O)O)cc1Cl to produce CC(=O)Oc1ccc(C=CC(=O)N=[N+]=[N-])cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.