Using COc1ccc(/C=C/CCCCOc2ccc(C(=O)c3cccc(C(=O)O)c3)cc2OCC(=O)O)cc1 to produce COc1ccc(/C=C/CCCCOc2ccc(C(O)c3cccc(C(=O)O)c3)cc2OCC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.