Object To study the chemical constituents of Schizonepeta tenuifolia (Benth.) Briq.. Methods The monoterpenoid constituents of S. tenuifolia were separated on silica gel column and their structures were elucidated by spectral. Results Two new compounds and three known compounds were obtained. Conclusion The new compounds were identified as 3-hydroxy-4(8)-ene-p-menthane-3(9)-lactone and 1, 2-dihydroxy-8(9)-ene-p-menthane.

Parkinson's disease （PD） is a kind of chronic progressive neurodegenerative disease that has a high prevalence rate in recent years， especially in the elderly. PD belongs to the category of "tremor disease" and "tremor" in traditional Chinese medicine， and Tianma Goutengyin is a classic prescription contained in the Synopsis of The New Significance of Patterns and Treatment in Miscellaneous Diseases（《中医内科杂病证治新义》）. This article explored the theory of Tianma Goutengyin in the treatment of PD， and based on network pharmacological research， the article summarized relevant research on Tianma Goutengyin and its single herb in the treatment of PD. Moreover， it discussed the clinical applications and mechanisms of Tianma Goutengyin and its single herb in the treatment of PD. It is found that the mechanisms of Tianma Goutengyin in treating PD may be related to resisting oxidative stress， inhibiting inflammatory response， regulating neurotransmitters， and protecting dopamine （DA） neurons. Besides， the main components of the single herb in Tianma Goutengyin for treating PD are gastrodin， rhynchophylline， geniposide， gardenial alcohol， eucommitol glycoside， motherwort alkaloid， baicalin， pachyman， and achyranthes bidentata sterol. They can improve the related symptoms of PD patients by inhibiting inflammatory response， resisting oxidative stress， affecting calcium ion concentration， restoring mitochondrial function， and and protecting DA neurons. This article summarized the research progress of Tianma Goutengyin and its single herb in treating PD， so as to provide a reference for the prescription and medication of Tianma Goutengyin in the treatment of PD and subsequent research on the mechanisms of Tianma Goutengyin and its single herb in the treatment of PD and give play to the advantages of traditional Chinese medicine in the treatment of PD.