Using CC(C)[N+](=O)[O-], Cc1cccc(C(=O)C(C)(C)[N+](=O)[O-])c1 to produce Cc1cccc(C(=O)C(C)(C)C(C)(C)[N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.