Using COC(=O)/C=C/C=C(/c1ccc(OC)cc1)c1ccccc1OC to produce COc1ccc(/C(=C/C=C/C(=O)O)c2ccccc2OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.