Using CC(C)(C)OC(=O)N1CCNC(C(N)=O)C1, Cc1cccc(C)c1NC(=O)C(Cl)Br to produce Cc1cccc(C)c1NC(=O)CN1CCN(C=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.