Using Cc1c2c(c([N+](=O)[O-])c(C)c1[N+](=O)[O-])C(C)(C)CC2 to produce Cc1c(N)c(C)c2c(c1N)C(C)(C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.