Using COc1ccc(-c2ccc(-c3ccc(OC)cc3)c(-c3ccc(OCc4ccccc4)cc3)n2)cc1 to produce COc1ccc(-c2ccc(-c3ccc(OC)cc3)c(-c3ccc(O)cc3)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.