title: Pterocarpadiols A-D, Rare 6a,11b-Dihydroxypterocarpans from Derris robusta.
abstract: Four hitherto unknown 6a,11b-dihydroxypterocarpans, namely pterocarpadiols A-D (1-4), were isolated from the ethanol extract of the twigs and leaves of Derris robusta. Their structures were elucidated on the basis of extensive spectroscopic analysis. Pterocarpadiols A-D are a kind of very rare 6a,11b-dihydroxypterocarpans, and their presence as markers may be helpful in chemotaxonomical classification.
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
authors.forename: Xiang-Mei
authors.initials: XM
authors.lastname: Li
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
authors.forename: Mei-Fen
authors.initials: MF
authors.lastname: Mao
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
authors.forename: Fu-Cai
authors.initials: FC
authors.lastname: Ren
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
authors.forename: Xian-Jun
authors.initials: XJ
authors.lastname: Jiang
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Hai
authors.affiliation: BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China. f.wang@mail.biobiopha.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
keywords: 6a,11b-Dihydroxypterocarpan; Derris robusta; Pterocarpadiol