Using CCOCCn1cc(C2CCN(CCOc3ccccc3C(=O)[O-])CC2)c2ccccc21 to produce CCOCCn1cc(C2CCN(CCOc3ccccc3C(=O)O)CC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.