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Communication | Regular issue | Vol 23, No. 4, 1985, pp.819-824
Published online, 1st January, 1970
DOI: 10.3987/R-1985-04-0819
Structures of Kuwanols A and B, Two Novel Stilbene Derivatives from the Cultivated Mulberry Tree (Morus bombycis Koidz.)

Yoshio Hano, Masato Itoh, and Taro Nomura*

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


From an acetone extract of the reddish violet powder obtained from the surface of the root bark of cultivated mulberry tree (Ohshimaso, a variety of Morus bombycis Koidz.), two novel stilbene derivatives were isolated and named kuwanols A and B, whose structures were shown to be 1 and 2, respectively, on the basis of spectral evidence. These compounds are regarded biogenetically as variations of a Diels-Alder type adduct of a chalcone derivative and a dehydroprenylstilbene derivative.