title: A new xanthone from Garcinia nitida.
abstract: 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 ((1)H, (13)C, DEPT, COSY, HMBC and HMQC) while molecular masses were determined via MS techniques; 1 is a new compound.
authors: Department of Chemistry, Faculty of Science, University Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia. gwen@science.upm.edu.my
authors: G C L
authors: GC
authors: Ee
authors: C H
authors: CH
authors: Foo
authors: V Y M
authors: VY
authors: Jong
authors: N H
authors: NH
authors: Ismail
authors: M A
authors: MA
authors: Sukari
authors: Y H
authors: YH
authors: Taufiq Yap
authors: K
authors: K
authors: Awang
mesh_terms: D029760:Garcinia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D044004:Xanthones / Q000302:isolation & purification*
chemical_list: D044004:Xanthones; C009689:xanthone