Taiwaniaflavone (3,3′-linked biapigenin)(1) and its methyl ethers [(2) and (3)] isolated from the leaves of Taiwania cryptomerioides Hayata (Taxodiaceae) have been identified on the basis of spectral data and by synthesis of taiwaniaflavone methyl ethers [(5) and (29)]. Five known biflavones [(7), (8), (9), (10), and (11)] have also been isolated from the same plant.
M. Kamil, M. Ilyas, W. Rahman, N. Hasaka, M. Okigawa and N. Kawano, J. Chem. Soc., Perkin Trans. 1, 1981, 553 DOI: 10.1039/P19810000553
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