作者:Adewale Martins Adio、Claudia Paul、Petra Kloth、Wilfried A König
DOI:10.1016/j.phytochem.2003.10.018
日期:2004.1
The essential oil of the liverwort Scapania undulata, collected in the Harz mountains, Northern Germany, was analysed by gas chromatography (GC), GC-mass spectrometry (MS) and several new components were isolated and investigated by various NMR techniques. As new natural compounds the sesquiterpene hydrocarbons (+)-helminthogermacrene (1) [the 4Z-isomer of germacrene A (9)], (-)-cis-beta-elemene (2)
通过气相色谱 (GC)、GC-质谱 (MS) 分析收集在德国北部哈尔茨山脉的地衣 Scapania undulata 精油,并通过各种 NMR 技术分离和研究了几种新成分。作为新的天然化合物,倍半萜烃 (+)-helminthogermacrene (1) [germacrene A (9) 的 4Z-异构体],(-)-cis-beta-elemene (2) 作为 1 的 Cope 重排产物,( +)-beta-isolongibornene (3) 和 (-)-perfora-1,7-diene (4) 可以被识别。图 1 与锗烯 A (9) 具有相同的质谱和相同的非极性固定相上的 GC 保留时间,但比后者稳定得多。1 的 Cope 重排在 350 摄氏度下缓慢进行,并且 (-)-cis-beta-elemene (2) 与少量其他非对映异构体一起形成。