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钩藤降血压作用的有效成分经研究证明为以钩藤碱(rhynchophylline)为主成分的生物碱,已经鉴定,供临床应用。因此上述成分的含有情况,可以作为鉴别钩藤质量优劣的一个标准,有关总生物碱的含量已有报道。本文考察了国产12种钩藤,包括钩枝、茎、根、叶等不同部位及云南、广西、广东等不同产地的样品共140余份。用硅胶G薄层层析,三种以上溶剂系统,一定量的已知品对照,以观察钩藤碱在总碱中的相对含量。结果可以分为三种情况:(1)大叶钩藤(Uncuria macrophyllawall)、膜叶钩藤(U. membranibolia How)、云南钩藤(U. yunnanesis Hsia. )、鹰爪风(U. wangiiHow)、毛钩藤(U. hirsuta Havil)
The active ingredients of the uncramable blood pressure of Uncaria rhynchophylla have been studied and proved to be an alkaloid which is mainly composed of rhynchophylline and has been identified for clinical application. Therefore, the content of the above ingredients can be used as a criterion for the identification of the quality of Uncaria, and the content of total alkaloids has been reported. In this paper, we investigated 12 kinds of domestic uncaria, including more than 140 samples of different parts such as hooks, stems, roots, leaves, and Yunnan, Guangxi, and Guangdong. Using silica gel G thin layer chromatography, three or more solvent systems, a certain amount of known product control, to observe the relative content of rhynchophylline in the total alkali. The results can be divided into three cases: (1) Uncuria macrophyllawall, U. membranibolia How, U. yunnanesis Hsia, and U. wangii How. U. hirsuta Havil