Using O=S(=O)(OCC(F)(F)C(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, CCS(=O)(=O)c1ccc(C(=O)OC)c(Cl)c1O to produce CCS(=O)(=O)c1ccc(C(=O)OC)c(Cl)c1OCC(F)(F)C(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.