Using OB(O)c1cccc(-c2ccccc2)c1, Brc1ccc2ccc3c(Br)ccc4ccc1c2c43 to produce Brc1ccc2ccc3c(-c4cccc(-c5ccccc5)c4)ccc4ccc1c2c43, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.