Diterpenes and sesquitrpenes from Mikania banisteriae
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| Autores: | , , |
|---|---|
| Formato: | artículo original |
| Fecha de Publicación: | 1997 |
| Descrição: | Two new ent-kaurane diterpenes, 18,19-diacetoxy-ent-kaur-16-ene and 17-oxo-ent-kaur-15(16)-en-18-oic acid, were isolated from the aerial parts of Mikania banisteriae, together with the known ent-kauranes ent-kaur-16-en-18-oic acid and ent-kaur-16-en-18-ol. The structures were established by mass spectrometry, 1H NMR and partly 13C NMR spectroscopy. In addition, the sesquiterpene lactones eudesma-4(15),7(11)-dien-8β,12-olide and eudesma-4(15),7(11),8(9)-trien-12-olide as well as the sesquiterpenes 1β,6α-dihydroxyeudesm-4(15)-ene and caryophylleno-xide were identified by direct comparison (TLC, GC, GC-MS) with authentic samples. The chemotaxonomic significance is briefly discussed. ent-Kaur-16-en-18-oic acid and ent-kaur-16-en-19-oic acid showed no antifeedant, antimicrobial and antiinflammatory properties. |
| País: | Kérwá |
| Recursos: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Idioma: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/87845 |
| Acesso em linha: | https://www.sciencedirect.com/science/article/pii/S0031942297002288 https://hdl.handle.net/10669/87845 |
| Access Level: | acceso abierto |
| Palavra-chave: | Mikania banisteriae Asteraceae Diterpenes Ent-kauranes Sesquiterpenes Eudesmane Eudesmanolides Biological studies PHYTOCHEMISTRY |