Using CCCCOc1ccc(OC)cc1-c1ccc(COc2cccc(CCC(=O)OC)c2)cc1C to produce CCCCOc1ccc(OC)cc1-c1ccc(COc2cccc(CCC(=O)O)c2)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.