Using CON(C)C(=O)C1CCc2c([nH]c3c(C(N)=O)ccc(-c4c(F)cccc4F)c23)C1, C[Mg]Br to produce CC(=O)C1CCc2c([nH]c3c(C(N)=O)ccc(-c4c(F)cccc4F)c23)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.