Using CC(O)c1sc(-c2ccc(C(F)(F)F)cc2)cc1I, COC(=O)CCc1ccc(S)cc1C to produce COC(=O)CCc1ccc(SC(C)c2sc(-c3ccc(C(F)(F)F)cc3)cc2I)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.