Using CCCCc1oc2ccccc2c1C(=O)Nc1ccc(-c2ccc(OCC(=O)OC)cc2)cc1 to produce CCCCc1oc2ccccc2c1C(=O)Nc1ccc(-c2ccc(OCC(=O)O)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.