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 decomp it emits very toxic fumes of hydrochloric acid & nitrogen oxides.
user
Cl.Cl.Cl.Cl.Nc1ccc(-c2ccc(N)c(N)c2)cc1N
assistant