Studies On The Chemical Constisuents Of Several Liliales Medicinal Plants

The Liliaceae, which containing about230genus,3500species, distribute worldwidely and mainly distribute in temperature zone and subtropical zone. In our country, there are60gena and about560species, which can be found nationwidely. The plants of Liliaceae can be fallen into three categories:flower plant, edible plant and medical plant. The characteristic ingredients of the medical plants are flavonoids and steroids, which are also the active ingredients. The genus Smilax belonging to Liliaceae, possess about300plants. In china, there are about60species and some variants, and about47species of them are used as traditional medicine. The rhizomes of the plants of genus Smilax are used in traditional Chinese medicine (TCM) for the treatment of diuretic, rheumatic arthritic, detoxication, lumbago, gout, tumor and inflammatory diseases. Therefore, this thesis presents the phytochemical investigations of three plants of Liliaceae, and two of them belong to the genus Smilax. Moreover, the first chapter elaborates a review on the medical plants of the genus Smilax.Smilax bracteata Presl, climbing plants, belongs to genus Smilax (Liliaceae), which are mainly produced in Taiwan, Guangxi, Yunann etc. At present, there are only a few reports about the chemical constituents of S. bracteata, hence, the phytochemical researches were carried on the rhizomes of S. bracteata, which led to isolation of eight compounds, seven and one, including three new compounds.Smilax china L. belongs to genus Smilax (Liliaceae), The rhizomes of S.china L known as "Ba Qia" or "Jin Gang Teng" in China, is used in traditional Chinese medicine for the treatment of diuretic, rheumatic arthritic, detoxication, gout, tumor and inflammatory diseases. Four compounds were isolated from the rhizomes of this plant, including three new flavanonol acetylated glycosides and one known flavanonol glycoside.The genus Aletris L., originally belonging to Liliaceae, was attributed to the family Nartheciaceae by Dahgren et al. in1985. Three flavones and two steroidal saponins were isolated form A. spicata, which C-glycosylflavone were the first reported from Liliaceae (s.1.). This result supports the above conclusion in the chemotaxonomy. The last chapter was a summary of this thesis.