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