苏消安（英语：Treosulfan，又称曲奥舒凡）是一种正在研究的治疗癌症的药物。 它属于烷化剂。

Treosulfan is a substance that is being studied in the treatment of cancer. It belongs to the family of drugs called alkylating agents. It has been used mainly as a substitute of busulfan in frail patients, as the side effects and toxicity are supposedly less severe.