You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: When heated to decomposition it emits very toxic fumes of nitrogen oxides and phosphorus oxides.
user
CCNC(=O)Nc1ncc([N+](=O)[O-])s1
assistant