Using O=C(Nc1n[nH]c2ccc([N+](=O)[O-])cc12)c1ccccc1 to produce Nc1ccc2[nH]nc(NC(=O)c3ccccc3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.