Using Cc1ccc(S(=O)(=O)Cl)cc1, OCC1(C(F)(F)F)CC1 to produce Cc1ccc(S(=O)(=O)OCC2(C(F)(F)F)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.