Using CC(C)(C)OC(=O)N1CC(=O)C1, CC(C)(C)OC(=O)NC1CCNCC1 to produce CC(C)(C)OC(=O)NC1CCN(C2CN(C(=O)OC(C)(C)C)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.