Using COc1ccc(-c2cc(OC)cc(-c3ccc4cc(OC)ccc4c3)c2)cc1 to produce Oc1ccc(-c2cc(O)cc(-c3ccc4cc(O)ccc4c3)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.