Using FC(F)(F)I, CSc1cc(-c2c(Cl)cc(C(F)(F)F)cc2Cl)n[nH]1 to produce CSc1cc(-c2c(Cl)cc(C(F)(F)F)cc2Cl)nn1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.