Using COc1ccc(-c2c(-c3cc(Cl)c(OCc4ccccc4)cc3OCc3ccccc3)n[nH]c2Br)cc1 to produce COc1ccc(-c2c(-c3cc(Cl)c(O)cc3O)n[nH]c2Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.