Using C[Mg]Br, CON(C)C(=O)[C@@H]1CCCN1C(=O)OCc1ccccc1 to produce CC(=O)[C@@H]1CCCN1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.