Using COC(C)(C)CCO, O=S(=O)(Cl)c1ccccc1C(F)(F)F to produce COC(C)(C)CCOS(=O)(=O)c1ccccc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.