Three New Pregnane Glycosides from Marsdenia tinctoria |
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| Authors: | Zhu‐Lin Gao Hong‐Ping He Ying‐Tong Di Xin Fang Chun‐Shun Li Qiang Zhang Pei‐Ji Zhao Shun‐Lin Li Xiao‐Jiang Hao |
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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: +86‐871‐5223263;2. fax: +86‐871‐5219684);3. Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.?R. China;4. Graduate University of the Chinese Academy of Sciences, Beijing 100039, P.?R. China |
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| Abstract: | Three new pregnane glycosides, tinctorosides A–C ( 1 – 3 , resp.), together with one known pregnane glycoside, stephanoside B ( 4 ), were isolated from the stems of Marsdenia tinctoria R. Br . (Asclepiadaceae). Their structures were elucidated by extensive spectral methods, especially 2D‐NMR experiments (1H,1H‐COSY, HSQC, HMBC, TOCSY, HSQC‐TOCSY, and ROESY), and chemical evidence. |
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| Keywords: | Marsdenia tinctoria Glycosides Pregnane glycosides Tinctorosides A – C Stephanoside B |
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