Components of Root Bark of Cudrania tricuspidata 2. Structures of Two New Isoprenylated Flavones, Cudraflavones A and B.

Tomoko Fujimoto; Yoshio Hano; Taro Nomura; Jun Uzawa

doi:10.1055/s-2007-969660

Planta Medica, Inhaltsverzeichnis

Planta Med 1984; 50(2): 161-163
DOI: 10.1055/s-2007-969660

Research Articles

Components of Root Bark of Cudrania tricuspidata 2. Structures of Two New Isoprenylated Flavones, Cudraflavones A and B.

Tomoko Fujimoto¹ , Yoshio Hano¹ , Taro Nomura¹ , Jun Uzawa²

¹Faculty of Pharmaceutical Sciences, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274, Japan
²The Institute of Physical and Chemical Research, Wako, Saitama, Japan

Abstract

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Abstract

Two new isoprenylated flavones, cudraflavones A and B were isolated from the root bark of Cudrania tricuspidata (Carr.) Bur. (Japanese name “Hariguwa”, Moraceae). The structures of cudraflavones A and B were shown to be 1 and 2, respectively, on the basis of spectral data. Photo-oxidative cyclization occurred with cudraflavone B leading to the formation of a hydroperoxide possessing a dihydrooxepin ring.

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