You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: When heated to decomposition it emits toxic fumes of/nitrogen oxides.
user
O=[N+]([O-])N1CN([N+](=O)[O-])CN([N+](=O)[O-])C1
assistant