You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): Moderately dangerous; when heated to decomp, it emits toxic fumes of nitrogen oxides.
user
O=C1NC(=O)C(O)(C2(O)C(=O)NC(=O)NC2=O)C(=O)N1
assistant