A new xanthone from Garcinia nitida
- Ee, Gwendoline Cheng Lian
- Foo, C. H.
- Jong, Vivien Yi Mian
- Ismail, Nor Hadiani
- Md. Sukari, Mohd Aspollah
- Yap, Taufiq Yun Hin
- Awang, Khalijah
DOIAbstract
A detailed chemical study on the stem bark of Garcinia nitida has led to the isolation of five xanthones. They are 1,6-dihydroxy-5-methoxy-6, 6-dimethylpyrano[2',3':2,3]-xanthone (1), inophyllin B (2), osajaxanthone (3), 3-isomangostin (4) and rubraxanthone (5). The structures of these compounds were established using mainly 1-D and 2-D NMR spectroscopy (1H, 13C, DEPT, COSY, HMBC and HMQC) while molecular masses were determined via MS techniques; 1 is a new compound
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