Balansolide and other sesquiterpene lactones from Bejaranoa balansae |
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| Affiliation: | 1. Facultad de Ciencias Quimicas, Universidad de Asuncion, Paraguay;2. Institute for Organic Chemistry, Technical University of Berlin, D-1000 Berlin 12, West Germany;1. Department of Chemistry, Faculty of Science, The University of Maroua, P. O. Box 46, Maroua, Cameroon;2. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan;3. Department of Chemistry, Higher Teachers’ Training College, University of Maroua, P. O. Box 55, Maroua, Cameroon;4. Medical Research and Applied Biochemistry Laboratory, University of Buea, P. O. Box 63, Buea, Cameroon;5. Faculty of Sciences, Department of Chemistry, University of Douala, 24157, Douala, Cameroon;6. Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, P.O. Box 100131, 33501 Bielefeld, Germany;7. Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21412, Saudi Arabia;1. Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, 11566 Abbassia, Cairo, Egypt;2. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mu’tah University, 61710 Al-Karak, Jordan;3. Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt;1. Key Laboratory of TCM Quality Control Technology of Shandong Province, Shandong Analysis and Test Center, 19 Keyuan Street, Jinan, Shandong 250014, PR China;2. Reyoung Pharmaceutical Co., Ltd., No. 44Cultural West Road, Jinan 250012, PR China;1. School of Basic Sciences, Indian Institute of Technology Mandi, Kamand Campus, Mandi, HP 175005, India;2. Institute of Biophysics and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover, Herrenhäuser Strasse 2, 30419 Hannover, Germany;3. Institute of Technical Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover, Callinstrasse 5, 30167 Hannover, Germany;4. Institute of Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany;5. School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, Jatni Campus, Kurdha, Odisha, 752050, India;1. Universität Regensburg, Fakultät für Mathematik, Universitätsstraße 31, 93053 Regensburg, Germany;2. Universität Potsdam, Institut für Mathematik, Am Neuen Palais 10, 14469 Potsdam, Germany |
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| Abstract: | The aerial parts of Bejaranoa balansae afforded in addition to known sesquiterpene lactones six new ones, two highly oxygenated germacranolides and four guaianolides including balansolide with a 2,9-ether bridge. Furthermore, two geranyl nerol derivatives were present. The configuration of some 10,14-epoxyguaianolides have been revised from 10β to 10α and the stereochemistry at C-4 in 4,5-dihydrofuroheliangolides has also been corrected to 4β-methyl. The structures were elucidated by NMR spectroscopy. |
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