Using OB(O)c1ccc(C(F)(F)F)cc1, CC(=O)c1cccc(Br)c1 to produce CC(=O)c1cccc(-c2ccc(C(F)(F)F)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.