Using CC(C)(C)OC(=O)Nc1cccc([N+](=O)[O-])c1, C[Si](C)(C)C[Mg]Cl to produce CC(C)(C)OC(=O)Nc1ccc(C[Si](C)(C)C)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.