Using O=C(O)c1c[nH]c2cc([N+](=O)[O-])ccc12, O=C(c1ncc[nH]1)c1ncc[nH]1 to produce CNC(=O)c1c[nH]c2cc([N+](=O)[O-])ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.