Using CC(C)(C)OC(=O)N1CCNCC1, Nc1ccc(C(=O)O)cc1 to produce CC(C)(C)OC(=O)N1CCN(C(=O)c2ccc(N)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.