Using CCOC(=O)c1cnc(-c2ccc(OC)c(F)c2)c(Cl)c1, O=C1CCC(=O)N1I to produce CCOC(=O)c1cnc(-c2cc(F)c(OC)c(I)c2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.