Using CCOC(=O)C1CCN(CCn2cccc(-c3ccc(C(=O)OCc4ccccc4)cc3)c2=O)CC1 to produce CCOC(=O)C1CCN(CCn2cccc(-c3ccc(C(=O)O)cc3)c2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.