Tetrandrine(Tet) and alkaloids of Stephenia tetrandra S.Moore(AST) were isolated from Chinese natural medicine of Stephenia tetrandra S.Moore.

• 从中药粉防己中提取出粉防己碱、粉防己总生物碱,应用微量量热法研究了它们对大肠杆菌的抑制作用以及两种药物作用下大肠杆菌的耐药性。