Using CC(C)(C)OC(=O)N1CCC(CN)C(O)C1, O=C(n1ccnc1)n1ccnc1 to produce CC(C)(C)OC(=O)N1CCC2CNC(=O)OC2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.