Chemical investigation of ceylonese plants. Part 21. Extractives of Pentadesma butyracea Sabine (Guttiferae)

Abstract
From the bark and timber extracts of Pentadesma butyracea Sabine the following compounds have been isolated: β-amyrin acetate, β-amyrin, β-sitosterol, 1,3,5-trihydroxy-2-methoxyxanthone, jacareubin, osajaxanthone, and a new xanthone, pentadesmaxanthone, identified as 5,9,11-trihydroxy-3,3-dimethyl-6,8-bis-(3-methylbut-2-enyl)-3H,12H-pyrano[3,2-a]xanthen-12-one.

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