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Ypsiyunnosides A-E, Five New Cholestanol Glycosides from Ypsilandra yunnanensis |
Yu Chen1,2, Yong-Ai Si1,2, Wei Ni1, Huan Yan1, Xu-Jie Qin1, Chang-Xiang Chen1, Hai-Yang Liu1 |
1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; 2. University of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract Phytochemicalinvestigationonthewholeplantsof Ypsilandrayunnanensiswascarriedoutforthefirsttimeandledtothe isolation of five new cholestanol glycosides, ypsiyunnosides A-E (1-5), and one known analogue. Their structures were determined mainly by detailed spectroscopic analysis, including extensive 1D and 2D NMR, MS and UV, as well as chemical methods. Among them, compound 1 possessed a rare 6/6/6/5/5 fused-rings cholestanol sketelon, which was identified as (23R,25R)-3β,16α,26-triol- 16,23-cyclocholest-5,17(20)-dien-22-one. Their induced platelet aggregation activities and cytotoxicities were evaluated.
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Keywords
Ypsilandra yunnanensis
Liliaceae
Cholestane glycoside
Ypsiyunnosides A-E
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Fund:This work was supported by the National Natural Science Funding of China (Grants 31170333 and 31570363) |
Issue Date: 08 February 2018
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