Anthraquinones and triterpenoids from roots of Knoxia roxburghii
Hong, Y.-L.; Ma, L.; Wang, Y.-F.; Sun, J.-F.; Hou, G.-G.; Zhao, F.; Han, J.-T.; Wang, C.-H.
Zhongguo Zhong Yao Za Zhi 39(21): 4230-4233
2014
ISSN/ISBN: 1001-5302 PMID: 25775799 Document Number: 676285
Nine compounds were isolated from an ethanol extract of the roots of K. roxburghii by using a combination of various chromatographic techniques including column chromatography over silica gel, MCI gel, Sephadex LH-20, and reversed-phase HPLC. On the basis of physical-chemical properties and spectroscopic data analysis, their structures were identified as munjistin (1), 1-methoxy-3,6-dihydroxy-2-hydroxymethyl-9,10-anthraquinone (2), 1,2,3-trihydroxy-9,10-anthraquinone (3), arjunolic acid (4), hyptatic acid-A (5), hyptatic acid-B (6), 2α,3β,24-trihydroxyurs-12-en-28-oic acid (7), 2α,3β,23-trihydroxyurs-12-en-28-oic acid (8), and daucosterol (9). Compounds 1-9 were obtained from this genus for the first time.