苯丁酸氮芥（英语：Chlorambucil，葛兰素史克发售商品名瘤可宁）是一种主要用于治疗慢性淋巴细胞白血病的化疗药物。它属于氮芥类烷化剂。 不同于大部分化疗药物，苯丁酸氮芥主要为口服用药。

Chlorambucil (marketed as Leukeran by GlaxoSmithKline) is a chemotherapy drug that has been mainly used in the treatment of chronic lymphocytic leukemia. It is a nitrogen mustard alkylating agent and can be given orally.

It is on the World Health Organization's List of Essential Medicines, a list of the most important medication needed in a basic health system.