Using Cc1cc(C(=O)NNC(=O)C(C)(C)C)ccc1[N+](=O)[O-] to produce Cc1cc(-c2nnc(C(C)(C)C)o2)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.