The nuts of Garcinia kola Heckel contain 3,8-linked biflavanones and triterpenes. A new metabolite, kolaflavanone, has been characterised as the II-4′-methyl ether of GB-2, as part of a 13C n.m.r. study of flavonoids.
P. J. Cotterill, F. Scheinmann and I. A. Stenhouse, J. Chem. Soc., Perkin Trans. 1, 1978, 532 DOI: 10.1039/P19780000532
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