Two new norsesquiterpenes from Ligularia lapathifolia.
Two new norsesquiterpenes were isolated from the extracts of the roots and rhizomes of Ligularia lapathifolia (Franch.) Hand.-Mazz. Their structures were identified as 2-acetyl-3a-methyl-5-(2-methyl-but-2-enoyloxy)-3a,4,5,6,7,7a-hexahydro-H-indene-4-carboxylic acid (1) and 2-acetyl-8a-methyl-2-(2-methyl-but-2-enoyloxy)-6-oxo-1,2,3,4,4a,5,6,8a-octahydro-naphthalene-1-carboxylic acid (2), respectively, on the basis of spectral data and for 1 by single-crystal X-ray analysis.
Li
Yun-Sen
YS
Department of Pharmacognosy, China Pharmaceutical University, Nangjing 210038, P R China. sinodlsia@yahoo.com
Wang
Zheng-Tao
ZT
Zhang
Mian
M
Chen
Ji-Jun
JJ
Luo
Shi-De
SD
D019659:Asteraceae / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009281:Naphthalenes / Q000737:chemistry* / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D013057:Spectrum Analysis
C486117:2-acetyl-3a-methyl-5-(2-methylbut-2-enoyloxy)-3a,4,5,6,7,7a-hexahydro-1H-indene-4-carboxylic acid; C486118:2-acetyl-8a-methyl-2-(2-methylbut-2-enoyloxy)-6-oxo-1,2,3,4,4a,5,6,8a-octahydronaphthalene-1-carboxylic acid; D009281:Naphthalenes; D010936:Plant Extracts