Biflavones of Dioon,
Dr. Dossaji, Saifuddin Fidahussein
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Seven biflavones, amentoflavone, bilobetin, sequoiaflavone, ginkgetin, sciadopitysin, 7,4 Œ,7 Œ,4triple prime-tetra-O-methylamentoflavone, and diooflavone (amentoflavone hexamethyl ether), were identified from extracts of the cycad genus Dioon. The biflavones were identified by direct comparison with authentic samples using m.m.p., co-chromatography in 3 solvents, and NMR studies of the acetates. This is the first time amentoflavone hexamethyl ether has been identified as a natural product. After surveying numerous species of the Cycadales, no evidence could be obtained for the occurrence of biflavone glycosides or of biflavones based upon any other nucleus than apigenin.
CitationDR. DOSSAJI, SAIFUDDINFIDAHUSSEIN. 1973. Biflavones of Dioon,. Phytochem.12, 371.. : Journal of Natural Products
University of NairobiCollege of biological and physical science