Using COC(=O)c1c(Nc2ccccc2F)cncc1-c1ccccc1F, O=C1CCC(=O)N1I to produce COC(=O)c1c(Nc2ccc(I)cc2F)cncc1-c1ccccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.