Iguesterin,a new quinonoid triterpene from Catha cassinoides |
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| Authors: | Antonio G González Cosme G Francisco Raimundo Freire Rosendo Hernández José A Salazar Ernesto Suárez |
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| Institution: | Department of Organic and Biochemistry, University of La Laguna, Instituto de Investigaciones Quimicas, C.S.I.C., Tenerife, Spain |
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| Abstract: | β-Amyrin, sitosterol, celastrol, pristimerin, tingenone and a new hydroxymethylene quinonoid dinor-triterpene iguesterine were isolated from the root bark of Catha cassinoides. The structure of iguesterine was determined spectroscopically and by synthesis from tingenone. Tentative assignments are given for the chemical shifts of the methyl groups of iguesterin, tingenone and some of their derivatives. |
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| Keywords: | Celastraceae peralillo sitosterol β-amyrin quinonoid triterpenes iguesterin celastrol pristimerin tingenone PMR |
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