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): When heated to decomposition it emits toxic fumes of hydrogen chloride.
user
O=C1OC(=O)C2C1C1(Cl)C(Cl)=C(Cl)C2(Cl)C1(Cl)Cl
assistant