Using CC(C)(C[C@@](O)(CCO)C(F)(F)F)c1ccc(Cl)cc1S(C)(=O)=O to produce CC(C)(C[C@@](O)(CC=O)C(F)(F)F)c1ccc(Cl)cc1S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.