Using CC(=O)Nc1cncc(N2CCN(C(=O)OC(C)(C)C)CC2)n1, Clc1cccc(CBr)c1 to produce CC(=O)N(Cc1cccc(Cl)c1)c1cncc(N2CCN(C(=O)OC(C)(C)C)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.