You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: When heated to decomposition it emits very toxic fumes of nitroxides and hydrogen chloride.
user
Cl.Cl.NC(=O)OCC1N=C(N)N2CCC(O)(O)C23NC(N)=NC13
assistant