Extractives from guttiferae. Part IX. The isolation of buchanaxanthone and two related xanthones from Garcinia buchananii Baker
Abstract
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.