Using CC(=O)[C@H]1COC[C@@H](c2cc(F)c(F)c(F)c2)N1, C[Mg]Br to produce CC(C)(O)[C@H]1COC[C@@H](c2cc(F)c(F)c(F)c2)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.