title: A new prenylated xanthone from the branches of Calophyllum inophyllum.
abstract: The investigation of chemical constituents from the branches of Calophyllum inophyllum Linn led to the isolation of a new prenylated xanthone, named caloxanthone Q (1), together with three known compounds, 2-deprenylrheediaxanthone B (2), jacareubin (3), and 6-deoxyjacareubin (4). Their structures were completely elucidated on the basis of spectroscopic methods (UV, IR, HR-ESI-MS, 1D NMR, and 2D NMR).
authors.affiliation: Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.
authors.forename: Dai-Jing
authors.initials: DJ
authors.lastname: Wei
authors.forename: Wen-Li
authors.initials: WL
authors.lastname: Mei
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Zhong
authors.forename: Yan-Bo
authors.initials: YB
authors.lastname: Zeng
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Wu
authors.forename: Hao-Fu
authors.initials: HF
authors.lastname: Dai
mesh_terms: D029759:Calophyllum / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D006801:Humans; D020014:K562 Cells; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018547:Plant Stems / Q000737:chemistry; D011714:Pyrans / Q000737:chemistry / Q000302:isolation & purification; D014966:Xanthenes / Q000737:chemistry / Q000302:isolation & purification; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C438127:5,10-dihydroxy-2,2-dimethylpyrano(3,2-b)xanthen-6(2H)-one; D004365:Drugs, Chinese Herbal; D011714:Pyrans; D014966:Xanthenes; D044004:Xanthones; C558054:caloxanthone Q