Using NC(=O)CCC(=O)NI, CC(C)(C)OC(=O)Nc1cc(OCc2ccccc2)c2c(Br)cccc2c1 to produce CC(C)(C)OC(=O)Nc1cc(OCc2ccccc2)c2c(Br)cccc2c1I, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.