Using Br[Mg]c1ccccc1, CCC[C@H](NC(=O)OC(C)(C)C)C(=O)N(C)OC to produce CCC[C@H](NC(=O)OC(C)(C)C)C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.