Using Fc1cccc([Mg]Br)c1, OC(c1ccc(Br)cc1)C(F)(F)F to produce OC(c1ccc(-c2cccc(F)c2)cc1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.