Using CN1CCN(C(=O)c2nc3c([N+](=O)[O-])cccc3[nH]2)CC1 to produce CN1CCN(C(=O)c2nc3c(N)cccc3[nH]2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.