Using CON(C)C(=O)[C@H](C)NC(=O)OC(C)(C)C, Br[Mg]c1ccc2c(c1)OCCO2 to produce C[C@H](NC(=O)OC(C)(C)C)[C@H](O)c1ccc2c(c1)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.