中医应用的细辛主要为细辛属植物辽细辛及华细辛。目前在陕西及四川,多以毛细辛(Asarum himalaicum Hook f.et Thoms)作细辛入药。毛细辛挥发油成分的研究未见报道。我们采用气相色谱-质谱联机并结合气相制备和红外光谱对毛细辛挥发油的成分进行了研 The Asarum used in traditional Chinese medicine is mainly the Asarum genus Asarum and Hua Xixin. At present, in Shaanxi and Sichuan, Asarum himalaicum Hook f.et Thoms is used as a medicine for Asarum. The study of the constituents of the volatile oil of Capsicum has not been reported. We studied the constituents of volatile oil from Capillaria fragilis using gas chromatography-mass spectrometry in combination with gas phase preparation and infrared spectroscopy.