You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule has Odorless. The molecule has Bitter metallic taste. When heated to decomposition it emits toxic fumes of sodium oxide.
user
O=[Cr](=O)([O-])[O-].[Na+].[Na+]
assistant