Fourteen heliangolides from Calea species |
| |
| Authors: | Ferdinand Bohlmann Ulrich Fritz Robert M King Harold Robinson |
| |
| Institution: | 1. Institute for Organic Chemistry, Technical University of Berlin, D-1000 Berlin 12, W. Germany;2. Smithsonian Institution, Washington, DC 20560, U.S.A. |
| |
| Abstract: | The investigation of two further Calea species afforded, in addition to known compounds, fourteen new heliangolides, most of them being 11,13-epoxides. One lactone is a new type, a heliangolide substituted with a monoterpene residue. Furthermore, a new chromene and a new dithienyl derivative were isolated. The structures were elucidated by spectroscopic methods. The chemotaxonomic situation is discussed briefly. |
| |
| Keywords: | Compositae sesquiterpene lactones new heliangolides myrtenyl heliangolide new chromene derivative new dithienyl derivative |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
