Using COc1ccc(C=Cc2cccc(C(=O)[O-])c2)cc1OC1CCCC1 to produce COc1ccc(C=Cc2cccc(C(=O)O)c2)cc1OC1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.