Using COc1cc(COc2cccc(O)c2O)cc(OC)c1, COc1ccc(CBr)cc1OC to produce COc1cc(COc2cccc(OCc3ccc(OC)c(OC)c3)c2O)cc(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.