Using COC(=O)C(Oc1ccc(CCC(=O)OCc2ccccc2)cc1)C(=O)N(C)CCO to produce COC(=O)C(Oc1ccc(CCC(=O)O)cc1)C(=O)N(C)CCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.