Using COC(=O)C(=O)Cc1c([N+](=O)[O-])cc(I)cc1C(F)(F)F, O=S([O-])[O-] to produce O=C(O)Cc1c([N+](=O)[O-])cc(I)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.