Buchanaxanthone, 1,5,6-trihydroxyxanthone, and 1,5-dihydroxyxanthone have been isolated from the heartwood of Garcinia buchananii Baker. Buchanaxanthone is shown by u.v. and n.m.r. spectroscopy and by synthesis to be 1,6-dihydroxy-5-methoxyxanthone.
B. Jackson, H. D. Locksley, I. Moore and F. Scheinmann, J. Chem. Soc. C, 1968, 2579 DOI: 10.1039/J39680002579
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