Using C[C@H]1[C@H](O)C(F)(F)C(=O)N1c1cccc(Cl)c1, O=C1CCC(=O)N1I to produce C[C@H]1[C@H](O)C(F)(F)C(=O)N1c1ccc(I)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.