Using CC(C)(C)OC(=O)N1CCNCC1, ClC1CCc2cc(Br)ccc21 to produce CC(C)(C)OC(=O)N1CCN(C2CCc3cc(Br)ccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.