Journal
FITOTERAPIA
Volume 89, Issue -, Pages 42-47Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fitote.2013.05.017
Keywords
Rauvolfia yunnanensis; Indole alkaloids; Rauvoloids A-E
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Funding
- Natural Science Foundation of Yunnan Province [2012CG020]
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Five new indole alkaloids, rauvoloids A-E (1-5), together with two known ones, raucaffrinoline (6) and perakine (7) were isolated from the leaves of Rauvolfia yunnanensis. Their structures were elucidated by extensive spectroscopic methods. Structurally, rauvoloids A (1), B-C (2-3) and D (4) with unusual substitution patterns (no substitution, Cl and (1E)-3-oxo-butenyl, respectively) at C-20, are the first examples of perakine-type alkaloids with C-18 and C-22 skeletons. (c) 2013 Elsevier B.V. All rights reserved.
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