Using FC(F)(F)C(F)(F)I, O=C(Cl)c1ccccc1Cl to produce OC(c1ccccc1Cl)(C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.