Using CCOC(=O)C(N)C(=O)OCC, O=C1CCC(=O)N1C(=O)OCc1ccccc1 to produce CCOC(=O)C(NC(=O)OCc1ccccc1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.