Calocalabaxanthone,the putative isoprenyl precursor of calabaxanthone from Calophyllum calaba |
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| Authors: | Vijaya Kumar Subramaniam Sotheeswaran Sivagnanasundram Surendrakumar Sinnathamby Balasubramaniam |
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| Affiliation: | 1. Department of Botany, University of Peradeniya, Peradeniya, Sri Lanka |
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| Abstract: | The bark of Calophyllum calaba var. calaba contains a new xanthone, 2,8-di-(3-methylbut-2-enyl)-1,3-dihydroxy-7-methoxyxanthone (calocalabaxanthone), the precursor of 5-hydroxy-8-methoxy-2,2-dimethyl-7-(3-methylbut-2-enyl)-2H,6H-pyano-(3,2-b)-xanthen-6-one (calabaxanthone). In addition the bark contains calabaxthone and the other constituents isolated earlier from Calophyllum calaba var. worthingtonii. |
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| Keywords: | Guttiferae xanthone precursor. |
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