Using C[Mg]Br, Cn1ncc(/C=N/[S@](=O)C(C)(C)C)c1Cl to produce C[C@H](N[S@](=O)C(C)(C)C)c1cnn(C)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.