Using O=S(Cl)Cl, CC(C)(C)N1C(=O)C(Cc2cc(C(F)(F)F)ccc2CO)c2cccnc21 to produce CC(C)(C)N1C(=O)C(Cc2cc(C(F)(F)F)ccc2CCl)c2cccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.