Using BrCc1ccccc1, O=c1c2ccccc2oc2cc(O)cc(O)c12 to produce O=c1c2ccccc2oc2cc(OCc3ccccc3)cc(O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.