China Journal of Chinese Materia Medica 2008-06-01

[Studies on chemical constituents of Dioscorea opposita].

Bing Bai, Ming-Jing Li, Yong Wang, Xiu-Hua Liu

Index: Zhongguo Zhong Yao Za Zhi 33(11) , 1272-4, (2008)

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Abstract

To study the chemical constituents of Dioscorea opposita.The chemical constituents were isolated and purified by silica gel column chromatography, and the structures were elucidated by their spectroscopic data and physico-chemical properties.Twelve compounds were obtained and identified as palmitic acid (1), beta-sitosterol (2), oleic acid (3), beta-sitosterol acetate (4), 5-(hydroxymethyl)furfural (5), nonanedioic acid (6), beta-daucosterol (7), cyclo-(Phe-Tyr) (8), cyclo-(Tyr-Tyr) (9), 6-methyl citrate (10), 1, 5-dimethyl citrate (11), trimethyl citrate (12).Compounds 3-12 were isolated from this plant for the first time and cyclodipeptides were firstly isolated from the Dioscoreae family; Compound 9 was a new natural product.