Using CC(C)(C)OC(=O)N1CCC(C(=O)Nc2ccccc2Br)CC1, CI to produce CN(C(=O)C1CCN(C(=O)OC(C)(C)C)CC1)c1ccccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.