Using CCOC(=O)C(=CN)C(=O)OCC, O=C1CCC2(CC1)OCCO2 to produce CCOC(=O)C(=CNC1CCC2(CC1)OC=CO2)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.