Three xanthones, 2-(3,3-dimethylallyl)-1,3,5,6-tetrahydroxyxanthone, 2-(3,3-dimethylallyl)-1,3,7-trihydroxyxanthone, and osajaxanthone have been isolated from the heartwood of Calophyllum canum Hook f. Jacareubin, present in small quantity, has been isolated as its dimethyl ether.
I. Carpenter, H. D. Locksley and F. Scheinmann, J. Chem. Soc. C, 1969, 486 DOI: 10.1039/J39690000486
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