Using COC(=O)c1cc(C(F)(F)F)cc(S(=O)(=O)CCCC(=O)OC(C)(C)C)c1 to produce CC(C)(C)OC(=O)CCCS(=O)(=O)c1cc(C(=O)O)cc(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.