Using CC(=O)N1CCc2cc(C(=O)CBr)ccc21, CC(C)(C)OC(=O)N1CCNCC1 to produce CC(=O)N1CCc2cc(CCN3CCN(C(=O)OC(C)(C)C)CC3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.