Using CC(C)(C)OC(=O)N1C2CCN(C(=O)OCc3ccccc3)CC21, Br[Mg]CC1CCC1 to produce CC(C)(C)OC(=O)N[C@@H]1CN(C(=O)OCc2ccccc2)CC[C@H]1CC1CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.