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: When heated to decomposition it emits toxic fumes of sulfoxides and phosphoxides.
user
CCOC(=O)CC(SP(=O)(OC)OC)C(=O)OCC
assistant