Using O=[N+]([O-])c1cc([N+](=O)[O-])c([O-])c([N+](=O)[O-])c1, [NH4+] to produce Nc1c([N+](=O)[O-])cc([N+](=O)[O-])cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.