Using O=C(O)C1CCC2CN1C(=O)N2OCc1ccccc1, CC(C)(C)OC(=O)NCC(=O)NN to produce CC(C)(C)OC(=O)NCC(=O)NNC(=O)C1CCC2CN1C(=O)N2OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.