Using CC(C)(C)OC(=O)N1CCC(N(C(=O)C(F)(F)Br)c2ccccc2I)CC1 to produce CC(C)(C)OC(=O)N1CCC(N2C(=O)C(F)(F)c3ccccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.