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Communication | Regular issue | Vol 22, No. 5, 1984, pp.997-1003
Published online, 1st January, 1970
DOI: 10.3987/R-1984-05-0997
Structures of Cudraflavanone A and Euchrestaflavabobe C

Tomoko Fujimoto and Taro Nomura*

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


From the benzene extract of the root bark of Cudrania tricuspidata (Carr. ) Bur. (Japanese name “Hariguwa”, Moraceae), an isoprene substituted flavanone derivative, named cudraflavanone A, was isolated, for which structure (I) was determined on the basis of the spectral and chemical evidences. From this result, the structure of euchrestaflavanone C which had been isolated from Euchresta japonica Hook. f. ex Regel, was reversed from the structure (I) to (II).