Using Fc1ccc(-c2ccc3nc(Cl)nc(Cl)c3n2)cc1, CC(C)[Mg]Br to produce CC(C)c1nc(Cl)nc2ccc(-c3ccc(F)cc3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.