Using [I-], O=[N+]([O-])c1cc([N+](=O)[O-])c2ccccc2c1OS(=O)(=O)C(F)(F)F to produce O=[N+]([O-])c1cc([N+](=O)[O-])c2ccccc2c1I, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.