Using Cc1ccc([S@](=O)C[C@](O)(CC(C)(C)c2cc(Cl)cc3c2OCC3)C(F)(F)F)cc1 to produce Cc1ccc(SC[C@](O)(CC(C)(C)c2cc(Cl)cc3c2OCC3)C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.