You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule has Chloroform like odor. It can be decomposed by contact with hot surfaces and open flame, and then yield toxic fumes that are irritating and give warning of their presence. when heated to decomposition it emits highly toxic fumes of phosgene and hydrogen chloride.
user
ClCCl
assistant