ISOLATION OF PRENYLATED CAGED XANTHONES FROM DICHLOROMETHANE EXTRACT OF GARCINIA HANBURYI STEM BARKS

Abstract

From the dichloromethane extract of the Garcinia hanburyi Hook. f. stem
barks collected in Phu Quoc - Kien Giang, three prenylated caged xanthones
(1-3), namely deoxymorellin (1), gambogic acid (2) and isogambogic acid (3)
have been isolated. The structures of these xanthones were elucidated by
analysis of their spectroscopic data, especially by 1D and 2D NMR as well as
comparison with reported compounds in the literature. This is the first time these
compounds were isolated from Garcinia hanburyi growing in Vietnam.