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Communication | Regular issue | Vol 45, No. 5, 1997, pp.867-874
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7794
Revised Structure of Sanggenon A

Yoshio Hano, Ryuichi Kanzaki, Toshio Fukai, and Taro Nomura*

*Faculty of Pharmaceutical Sciences, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274-8510, Japan

Abstract

The structure of sanggenon A, which has been isolated from the Chinese crude drug "Sang-Bai-Pi", was revised on the basis of two-dimentional NMR spectroscopic and chemical evidence. Sanggenon A is a unique 3-hydroxyflavanone derivative bearing an isoprenyl group at the C-2 position of the skeleton. The other flavanones having sanggenon A-type structure, including sanggenons M and C, also required the revision of the structure.