title: [Studies on flavonoids from stems and leaves of Calophyllum inophyllum].
abstract: OBJECTIVE
  To study the chemical constituents from the stems and leaves of Calophyllum inophyllum.
  
  
  METHODS
  The compounds were isolated by column chromatography on silica gel, Sephadex LH-20 and preparative TLC. Their structures were elucidated by chemical methods and NMR, MS spectroscopic data.
  
  
  RESULTS
  Nine compounds were identified as 2-hydroxyxanthone (1), 4-hydroxyxanthone (2), 1, 5-dihydroxyxanthone (3), 1, 7-dihydroxyxanthone (4), 1, 3, 5-trihydroxy-2-methoxyxanthone (5), 6-deoxyjacareubin (6), amentoflavone (7), kaempferol-3-O-alpha-L-rhamnoside (8) and quercetin-3-O-alpha-L-rhamnoside (9).
  
  
  CONCLUSIONS
  Compounds 8 and 9 were isolated from the genus Calophyllum and compounds 1, 2, 4-6 were isolated from this plant for the first time.
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Yan-zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: Zhan-lin
authors.initials: ZL
authors.lastname: Li
authors.forename: Hui-ming
authors.initials: HM
authors.lastname: Hua
authors.forename: Zheng-gang
authors.initials: ZG
authors.lastname: Li
authors.forename: Ming-sheng
authors.initials: MS
authors.lastname: Liu
mesh_terms: D029759:Calophyllum / Q000737:chemistry*; D002845:Chromatography / Q000379:methods; D005419:Flavonoids / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D006027:Glycosides / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D044949:Kaempferols / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D013058:Mass Spectrometry / Q000379:methods; D018515:Plant Leaves / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D011714:Pyrans / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D011794:Quercetin / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D014966:Xanthenes / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification
chemical_list: C438127:5,10-dihydroxy-2,2-dimethylpyrano(3,2-b)xanthen-6(2H)-one; D005419:Flavonoids; D006027:Glycosides; D044949:Kaempferols; D011714:Pyrans; D014966:Xanthenes; C470066:kaempferol 3-O-rhamnoside; C012526:quercitrin; D011794:Quercetin