Using COC(=O)[C@H](CC(=O)Cl)NC(=O)OCc1ccccc1, Cl[Mg]Cc1ccccc1 to produce COC(=O)[C@H](CC(=O)Cc1ccccc1)NC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.