Germacranolides from Mikania guaco
محفوظ في:
| المؤلفون: | , , , |
|---|---|
| التنسيق: | artículo original |
| تاريخ النشر: | 2001 |
| الوصف: | Fourteen novel sesquiterpene lactones of the germacranolide type have been isolated from the aerial parts of Mikania guaco: six costunolide, two melampolide and six germacra-4-trans,10(14),11(13)-trien-12,6α-olide derivatives. Except for one compound all the others possess a carbonyl function at C-9. Eight were obtained in the form of four isomer pairs which were difficult to separate. Structure elucidation was based on mass and 1D and 2D NMR measurements. Low energy conformations were obtained by quantum mechanical calculations. Pyrrolizidine alkaloids could not be detected. |
| البلد: | Kérwá |
| المؤسسة: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| اللغة: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/87850 |
| الوصول للمادة أونلاين: | https://www.sciencedirect.com/science/article/pii/S0031942200003940#! https://hdl.handle.net/10669/87850 |
| كلمة مفتاحية: | Mikania guaco Asteraceae Structure elucidation Sesquiterpene lactones Germacranolides PHYTOCHEMISTRY |