Guo-Zhu Wei . Mei-Fen Mao . Xiang-Mei Li . Fu-Cai Ren . Fei Wang

Received: 7 January 2016 / Accepted: 31 January 2016 / Published online: 19 February 2016

© The Author(s) 2016. This article is published with open access at Springerlink.com

Abstract

Four hitherto unknown prenylated isoflavonoids, named derrisisoflavones H–K (1–4) and one new isoflavan, namely 6-hydroxyisosativan (5), were isolated from the ethanol extract of Derris robusta. Their structures were elucidated on the basis of extensive spectroscopic studies. To our knowledge, derrisisoflavones J (3) and K (4) are the first examples of hydroxyethylated isoflavonoid.

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