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: Treosulfan is another chemical (cf. azide, mafosfamide and possibly other cytotoxic agents) that can cause airborne cytotoxicity.
user
CS(=O)(=O)OCC(O)C(O)COS(C)(=O)=O
assistant