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- Title
Ypsiyunnosides A-E, Five New Cholestanol Glycosides from Ypsilandra yunnanensis.
- Authors
Chen, Yu; Si, Yong-Ai; Ni, Wei; Yan, Huan; Qin, Xu-Jie; Chen, Chang-Xiang; Liu, Hai-Yang
- Abstract
Phytochemical investigation on the whole plants of Ypsilandra yunnanensis was carried out for the first time and led to the 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 (23 R,25 R)-3 β,16 α,26-triol-16,23-cyclocholest-5,17(20)-dien-22-one. Their induced platelet aggregation activities and cytotoxicities were evaluated. Graphical Abstract: Five new cholestanol glycosides, ypsiyunnosides A-E ( 1- 5), were isolated from the whole plants of Ypsilandra yunnanensis. Compound 1 possessed a rare 6/6/6/5/5 fused-rings cholestanol sketelon. Their structures were elucidated by a combination of 1D and 2D NMR, MS and chemical analysis.[Figure not available: see fulltext.]
- Subjects
GLYCOSIDES; PHYTOCHEMICALS; HERBACEOUS plants; MAGNETIC resonance imaging; MASS spectrometry
- Publication
Natural Products & Bioprospecting, 2016, Vol 6, Issue 3, p173
- ISSN
2192-2209
- Publication type
Article
- DOI
10.1007/s13659-016-0098-2