Two azafluoranthene alkaloids and a phytoecdysone from the stems of Cyclea barbata |
| |
| Authors: | Xiao-Jing Wang Qi Zhang Yu-Ru Peng Li Li Jing Qu Yun-Bao Liu |
| |
| Institution: | 1. State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China;2. College of pharmacy, Guangxi University of Chinese Medicine, Nanning 530200, China |
| |
| Abstract: | Two new azafluoranthene alkaloids (1 and 2), and a new phytoecdysone (3), were isolated from the stems of Cyclea barbata Miers, together with six known compounds (4–9). Their structures were elucidated by spectroscopic data analysis and comparison with published data. This is the first report of azafluoranthene alkaloids (1 and 2) and phytoecdysones (3, 8, and 9) from Cyclea genus. In in vitro bioassay, four isolates (3, 5, 6, and 9) showed moderate hepatoprotective activity against N-acetyl-p-aminophenol (APAP)-induced toxicity in HepG2 cells. 
| |
| Keywords: | Menispermaceae Cyclea barbata azafluoranthene alkaloid phytoecdysone hepatoprotective activity |
|
|
