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Planta Med 1983; 47(3): 151-156
DOI: 10.1055/s-2007-969975
Research Articles

© Hippokrates Verlag Stuttgart

Constituents of Cultivated Mulberry Tree

XII.[1] , [2] Isolation of Two New Natural Diels-Alder Adducts from Root Bark of Morus albaTaro Nomura1 , Toshio Fukai1 , Yoshio Hano1 , Katsumi Nemoto1 , Sumio Terada2 , Tadao Kuramochi3
  • 1Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan
  • 2Research Laboratory of Zen-Yaku Kogyo Co., Ltd. Nerima-ku, Tokyo, Japan
  • 3Chemical Analysis Centre, Chiba University, Yayoi-cho, Chiba, Japan
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Publication History

1982

1982

Publication Date:
26 March 2007 (online)

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Abstract

From the ethyl acetate extract of the cultivated mulberry tree (Morus alba L.), two new flavonoid derivatives with a fused dihydrochalcone partial moiety were isolated, and named kuwanons K and L. The structures of kuwanons K and L were shown to be 1 and 2 respectively, on the basis of chemical and spectral data. Kuwanons K (1) and L (2) are regarded biogenetically as Diels-Alder adducts of a chalcone derivative and a dehydroprenylflavonoid derivative, and are the first example of a flavonoid derivative possessing a cyclohexene ring at a B ring of a flavonoid derivative.

Key Word Index

Morus alba - Moraceae - Kuwanon K - Kuwanon L - Flavonoid - Diels-Alder adduct

1 Part XI: NOMURA, T., T. F>UKAI, Y. HANO and S. URANO: Planta Med. submitted.

2 A part of this work was presented at the 102th Annual Meeting of the Pharmaceutical Society of Japan, Osaka, April, 1982.

1 Part XI: NOMURA, T., T. F>UKAI, Y. HANO and S. URANO: Planta Med. submitted.

2 A part of this work was presented at the 102th Annual Meeting of the Pharmaceutical Society of Japan, Osaka, April, 1982.

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