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A new prenylated xanthone from Garcinia xipshuanbannaensis Y.H. Li
1Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan Province 666303, P.R. China. nazhi@xtbg.org.cn
Abstract:
A new prenylated xanthone, named bannaxanthone I, has been isolated from the leaves of Garcinia xipshuanbannaensis, along with five other known compounds, bannaxanthone E, mangostinone, tovophyllin A, garcinone E, and γ-mangostin. The structure of the new compound was elucidated on the basis of high-resolution fast atom bombardment mass spectra (HRFABMS), 1D-and 2D-NMR experiments, including heteronuclear multiple bond connectivity (HMBC), heteronuclear single quantum coherence (HSQC) and ¹H-¹H-COSY (correlated spectroscopy, COSY).
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