Using CCOC(=O)C(C(=O)OCC)C1CN(C(=O)OCc2ccccc2)C1 to produce CCOC(=O)C(C(=O)O)C1CN(C(=O)OCc2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.