First seco-C Oleananes from Nature
- 31 December 2003
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 6 (2) , 173-176
Abstract
The triterpenes 8,14-seco-oleana-8(26),13-dien-3β-ol (1) and its acetyl derivative 2 were isolated from Stevia viscida and Stevia eupatoria, respectively. Their structures were elucidated by 2D NMR, including carbon−carbon connectivity experiments, and confirmed by X-ray diffraction analysis of ketone 3. The absolute configuration was determined by NMR analysis of the Mosher esters of 1. The biogenetic implications of the new substances are discussed.Keywords
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