Using C=C[Mg]Br, CC(C)(C)[S@](=O)N=Cc1cc(Br)cc(C(F)(F)F)c1 to produce C=C[C@@H](N[S@@](=O)C(C)(C)C)c1cc(Br)cc(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.