Two new xanthones, calozeyloxanthone and zeyloxanthonone, from Calophyllum zeylanicum(Guttiferae)
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 1831-1835
- https://doi.org/10.1039/p19810001831
Abstract
Two new xanthones, calozeyloxanthone (1) and zeyloxanthonone (4), have been isolated from the bark of C. zeylanicum as well as betulinic acid, friedelan-3β-ol, calabaxanthone, taraxerone, friedelin, taraxerol, and β-sitosterol. Zeyloxanthonone (4) is identical with wightianone and the structure of the latter is revised. The timber of C. zeylanicum yielded 6-deoxyjacareubin (11), 1,6-dihydroxy-5-methoxyxanthone, 1,5-dihydroxyxanthone, 1,7-dihydroxyxanthone, 2-hydroxyxanthone, and jacareubin.Keywords
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