Four new isoflavones from Ampelopsis grossedentata.
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.
Wang
Ding-Yong
DY
Center of Natural Product, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. wdingyong@yahoo.com.cn
Zheng
Zong-Zhong
ZZ
Xu
Su-Ying
SY
Zheng
Shang-Zhen
SZ
D032421:Ampelopsis / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry
D007529:Isoflavones