title: Four new isoflavones from Ampelopsis grossedentata.
abstract: Four new isoflavones have been isolated from the BuOH extract of Ampelopsis grossedentata Hand.-Mazz. Based on spectral and chemical methods, their structures were elucidated as 6,7-dihydroxy-3'-methoxy-4',5'-methylenedioxyisoflavone 1; 6,7-dihydroxy-3'-methoxy-4',5'-methylenedioxyisoflavone 6-O-beta-D-glucopyranoside 2; 6,7-dihydroxy-3'-methoxy-4',5'-methylenedioxyisoflavone 6-O-alpha-L-rhamnopyranoside 3; 6,7-dihydroxy-3'-methoxy-4',5'-methylenedioxyisoflavone 6-O-beta-D-xylopyranosyl-(1-6)-beta-D-glucopyranoside 4. This is the first report on isolation of isoflavones from this plant.
authors.affiliation: Center of Natural Product, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. wdingyong@yahoo.com.cn
authors.forename: Ding-Yong
authors.initials: DY
authors.lastname: Wang
authors.forename: Zong-Zhong
authors.initials: ZZ
authors.lastname: Zheng
authors.forename: Su-Ying
authors.initials: SY
authors.lastname: Xu
authors.forename: Shang-Zhen
authors.initials: SZ
authors.lastname: Zheng
mesh_terms: D032421:Ampelopsis / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D007529:Isoflavones