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Planta Med 1984; 50(2): 127-130
DOI: 10.1055/s-2007-969649
Research Articles

© Georg Thieme Verlag Stuttgart · New York

Components of Root Bark of Morus Lhou [1] 1. Structures of Two New Natural Diels-Alder Adducts, Kuwanons N and O

Yoshio Hano2 , Kazuhiro Hirakura2 , Taro Nomura2 , Sumio Terada3 , Kazutaka Fukushima4
  • 2Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan.
  • 3Research Laboratory of Zen-Yaku Kogyo Co., Ltd., Nerima-Ku, Tokyo, Japan.
  • 4Research Institute for Chemobiodynamics, Chiba University, Inohana-cho, Chiba, Japan.
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Publication History

Publication Date:
26 February 2007 (online)

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Abstract

Kuwanons N and O, two new flavonoid derivatives with a fused dihydrochalcone partial moiety, and four known flavonoid derivatives, morusin, kuwanons G, H, and K, were isolated from the ethyl acetate extract of the root bark of Morus lhou (ser.) Koidz. The structures of kuwanons N and O were shown to be 1 and 2, respectively, on the basis of spectral data. They are regarded biogenetically as Diels-Alder adducts of a chalcone and a dehydroprenyl flavonoid.

1 Part XVI on Constituents of the Cultivated Mulberry Tree. Part XV: Hano, Y., Nomura, T. (1983) Heterocycles, 20, 107i.

1 Part XVI on Constituents of the Cultivated Mulberry Tree. Part XV: Hano, Y., Nomura, T. (1983) Heterocycles, 20, 107i.