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Derrisisoflavones H-K and One Isoflavan Derivative from Derris robusta
Guo-Zhu Wei1, Mei-Fen Mao1, Xiang-Mei Li1
1BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
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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