Two new lignans, (+)-4-(3-methylbutanoyl)-2,6-di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane and (+)-4-hydroxy-2,6di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane, together with the known lupeol and sitosteryl beta-D-glucopyranoside, have been isolated from the roots of Echinops giganteus var. lelyi C. D. Adams (Compositae). The structures were elucidated on the basis of spectral studies and comparison with published data. (C) 2004 Elsevier Ltd. All rights reserved.
Two New Stereoisomers of Tetrahydrofuranoid Lignans from the Flower Buds of <i>Magnolia fargesii</i>
作者:Jun Lee、Dongho Lee、Dae Sik Jang、Joo-Won Nam、Jong-Pyung Kim、Ki Hun Park、Min Suk Yang、Eun-Kyoung Seo
DOI:10.1248/cpb.55.137
日期:——
Two new stereoisomers of tetrahydrofuranoid lignans, 7S,8R,7'S,8'R- (1) and 7R,8S,7'S,8'R-3,4,3',4'-tetramethoxy-9,7'-dihydroxy-8.8',7.O.9'-lignan (2) along with nine known lignans including tetrahydrofuranoids (3, 4) and tetrahydrofurofuranoids (5-11) were isolated from a CHCl(3)-soluble fraction of the flower buds of Magnoliafargesii. Two tetrahydrofuranoids, magnostellin A (3) and lariciresinol
作者:Mathieu Tene、Pierre Tane、Beiban L. Sondengam、Joseph D. Connolly
DOI:10.1016/j.phytochem.2004.05.014
日期:2004.7
Two new lignans, (+)-4-(3-methylbutanoyl)-2,6-di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane and (+)-4-hydroxy-2,6di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane, together with the known lupeol and sitosteryl beta-D-glucopyranoside, have been isolated from the roots of Echinops giganteus var. lelyi C. D. Adams (Compositae). The structures were elucidated on the basis of spectral studies and comparison with published data. (C) 2004 Elsevier Ltd. All rights reserved.