Using Nc1ncc([N+](=O)[O-])cc1NC(=O)c1ccc([N+](=O)[O-])cc1 to produce O=[N+]([O-])c1ccc(-c2nc3cc([N+](=O)[O-])cnc3[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.