Three New Triterpene Saponins from Hemsleya chinensis |
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| Authors: | Zhen‐Jie Li Jian‐Chao Chen Yun Sun Na‐Li Song Bao‐Hui Cheng Lu Lu Wei‐Guang Ma Lin Zhou Xian‐Min Zhang Zhong‐Rong Li Ming‐Hua Qiu |
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| Institution: | 1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650204, P.?R. China, (phone: +86‐871‐5223255;2. fax: +86‐871‐5223225);3. Yunnan University of TCM, Kunming, 650050, P.?R. China;4. Graduate School of Chinese Academy of Sciences, Beijing 100039, P.?R. China |
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| Abstract: | Three new triterpenoid saponins, xuedanglycosides A–C ( 1 – 3 , resp.), along with six known ones, were isolated from the rhizomes of Hemsleya chinensis. By detailed analysis of the NMR spectra, by chemical methods, and by comparison with spectral data of known compounds, the structures of new compounds were determined to be 16α,23α‐epoxy‐2β,3α,20β‐trihydroxy‐10α,23α‐cucurbita‐5,24‐dien‐11‐on‐2‐yl β‐D ‐glucopyranoside ( 1 ), 2β,3α,16α,20β‐tetrahydroxycucurbita‐5,25‐diene‐11,22‐dion‐2‐yl β‐D ‐glucopyranoside ( 2 ), and oleanolic acid 28‐O‐β‐xylopyranosyl‐(1→6)‐O‐β‐glucopyranoside ( 3 ). In addition, hemslecin A 2‐O‐β‐D ‐glucopyranoside ( 6 ), hemsamabilinin B ( 7 ), and hemslonin A ( 9 ) were obtained for the first time from this plant. |
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| Keywords: | Hemsleya chinensis Saponins Xuedanglycosides A – C Triterpenes |
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