Using [N-]=[N+]=[N-], CCc1cc2c(cc1CC)C(=O)C(Cl)=CC2=O to produce CCc1cc2c(cc1CC)C(=O)C(N=[N+]=[N-])=CC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.