Abstract
From extracts of root bark of the cultivated mulberry tree (a variety of Morus alba L.) three new isoprene-substituted flavanones, Kuwanon D, E and F were isolated.
Their structures were shown to be I, II and III, respectively.
Key Word Index
Morus alba - Moraceae - Kuwanon D - Kuwanon E - Kuwanon F - Isoprenoid-flavanone
1 Part VI: Nomura, T., T. Fukai and J. Matsumoto: J. Heterocyclic Chem. 17, 641 (1980).
2 Preliminary accounts of this work have been presented: Nomura, T., T. Fukai and M.
Katayanagi: Heterocycles 9, 745 (1978); T. Nomura and T. Fukai: Heterocycles 9, 1295 (1978); 12, 943 (1979).
