Using CC(=O)c1ccc(-n2cnc(-c3c(-c4ccc(F)cc4)noc3C(F)(F)F)c2)cc1, C[Mg]Br to produce CC(C)(O)c1ccc(-n2cnc(-c3c(-c4ccc(F)cc4)noc3C(F)(F)F)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.