Using COCC(O)CNC(=O)OCc1ccccc1, O=C1NC(=O)c2ccccc21 to produce COCC(CNC(=O)OCc1ccccc1)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.