Using O=[N+]([O-])c1cc(Cl)c(Oc2ccc(S(=O)(=O)c3ccc(Cl)cc3)cc2)c(Cl)c1 to produce Nc1cc(Cl)c(Oc2ccc(S(=O)(=O)c3ccc(Cl)cc3)cc2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.