Using OB(O)c1cccc2ccccc12, Brc1cc(Br)cc(C=C(c2ccccc2)c2ccccc2)c1 to produce Brc1cc(C=C(c2ccccc2)c2ccccc2)cc(-c2cccc3ccccc23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.