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: Dangerous when heated to decomposition ... it emits toxic fumes of arsenic srp: including arsine. arsenic compounds/
user
O=[As]([O-])([O-])[O-].O=[As]([O-])([O-])[O-].[Fe+2].[Fe+2].[Fe+2]
assistant