First seco-C oleananes from nature |
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| Authors: | Román Luisa U Guerra-Ramírez Diana Morán Gerardo Martínez Iván Hernández Juan D Cerda-García-Rojas Carlos M Torres-Valencia J Martín Joseph-Nathan Pedro |
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| Affiliation: | Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Apartado 137, Morelia, Michoacán, 58000 Mexico. lroman@zeus.umich.mx |
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| Abstract: | ![]()
[structure: see text] The triterpenes 8,14-seco-oleana-8(26),13-dien-3beta-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. |
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