Using COC(=O)CS(=O)(=O)CCC(F)(F)F, FC(F)(Cl)C(F)(Cl)CCI to produce COC(=O)C(CCC(F)(Cl)C(F)(F)Cl)S(=O)(=O)CCC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.