A single active ingredient with the code name T4 hasrecently been isolated and prepared from the herbal plant,Tripterygium Wilfordii Hook (TWH).

• 近来从雷公藤(Tripterygium Wilfordii Hook，TWH)中分离、制备了一种活性单体成份代号为T4，初步动物研究表明，T4相对效价至少是T2(从TWH中制备的一种半纯品多甙)的100倍。