Using OB(O)c1cc(F)nc(F)c1, Fc1ccc(-c2nn3ccccc3c2Br)cc1 to produce Fc1ccc(-c2nn3ccccc3c2-c2cc(F)nc(F)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.