Xiang-Mei Li, Mei-Fen Mao, Fu-Cai Ren, Xian-Jun Jiang, Ping Hai, Fei Wang
Received: 19 October 2015 / Accepted: 25 October 2015 / Published online: 7 November 2015
© The Author(s) 2015. This article is published with open access at Springerlink.com
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.
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