Using O=C(OC(=C(F)F)C(F)(F)F)c1ccccc1, O=S([O-])O to produce O=C(OC(C(F)(F)F)C(F)(F)S(=O)(=O)[O-])c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.