Using OB(O)c1ccc(F)cc1, Cc1cccc(-c2nn3ccccc3c2Br)n1 to produce Cc1cccc(-c2nn3ccccc3c2-c2ccc(F)cc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.