Using OB(O)c1ccc2oc3ccccc3c2c1, Brc1ccc2cc(Br)ccc2c1 to produce Brc1ccc2cc(-c3ccc4oc5ccccc5c4c3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.