Further sesquiterpene lactones from costa rican eupatorieae |
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| Affiliation: | 1. Universidad de Costa Rica, Escuela de Quimica, Costa Rica;1. Natural Products Laboratory, School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea;2. Gachon Institute of Pharmaceutical Science, Gachon University, 191 Hambakmoero, Yeonsu-gu, Incheon 21936, Republic of Korea;3. College of Pharmacy, Gachon University, 191 Hambakmoero, Yeonsu-gu, Incheon 21936, Republic of Korea;1. Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan;2. Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen, Hue, Viet Nam;3. Department of Chemistry, University of Yangon, Yangon 11041, Myanmar;1. Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, PR China;4. School of Pharmacy, Guiyang Medical College, Guiyang 550004, PR China;5. Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Ministry of Education, Guiyang 550004, PR China;1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan;2. Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514, Japan;3. Department of Chemistry, Faculty of Science and Research Center for Materials with Integrated Properties, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan;1. Center for Biomolecular Sciences, University of Illinois at Chicago, 900 S. Ashland Ave, Chicago, IL 60607, USA;2. Novalex Therapeutics, Inc., 2242 W Harrison, Chicago, IL 60612, USA;3. Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St, Chicago, IL 60607, USA;4. Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA |
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| Abstract: | The aerial parts of Ayapana elata afforded two new germacranolides. The configuration at C-3 in one of them was the same as that of some bejaranolides, the structures of which therefore have to be revised. Critonia quadrangularis gave in addition to known compounds three elemanolides, a germacranolide, an isodaucane derivative and tremetone derivative. Critonia hebebotrya contained large quantities of known diterpene acids. Koanophyllon pittieri gave two epimeric ent-labdanes. The structures were elucidated by highfield NMR spectroscopy. |
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