Using O=C1CCc2cc(NC(=O)c3ccncc3)c([N+](=O)[O-])cc2N1 to produce O=C1CCc2cc3[nH]c(-c4ccncc4)nc3cc2N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.