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 toxic fumes of nitrogen oxide(x), mercury, potassium oxide, and cyanide.
user
N#C[Hg-2](C#N)(C#N)C#N.[K+].[K+]
assistant