title: [Study on Chemical Constituents of Oldenlandia diffusa].
abstract: OBJECTIVE
  To study the chemical constituents of Oldenlandia diffusa.
  
  
  METHODS
  The chemical constituents were isolated and purified by silica gel and Sephadex LH-20 column chromatography as well as recrystallization method, and their structures were elucidated on the basis of physical and spectral analyses.
  
  
  RESULTS
  Nine compounds were isolated and their structures were identified as quercetin (1), kaempferol (2), scopoletin (3), 2-hydroxy-3-methylanthraquinone (4), 2-hydroxy-l-methoxyanthraquinone (5), α-linolenic acid (6), vanillic acid (7), p-hydroxyphenylethanol (8) and, β-sitosterol (9).
  
  
  CONCLUSIONS
  Compound 6 is obtained from this genus for the first time. Compounds 7 and 8 are obtained from this plant for the first time.
authors.forename: Qiu-mei
authors.initials: QM
authors.lastname: Zhang
authors.forename: Zeng-yu
authors.initials: ZY
authors.lastname: Sun
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D032067:Oldenlandia / Q000737:chemistry*; D010626:Phenylethyl Alcohol / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D064209:Phytochemicals / Q000737:chemistry* / Q000302:isolation & purification; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D012603:Scopoletin / Q000737:chemistry / Q000302:isolation & purification; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D014641:Vanillic Acid / Q000737:chemistry / Q000302:isolation & purification; D017962:alpha-Linolenic Acid / Q000737:chemistry / Q000302:isolation & purification
chemical_list: C571792:2-hydroxy-3-methylanthraquinone; D000880:Anthraquinones; D044949:Kaempferols; D064209:Phytochemicals; D012855:Sitosterols; D017962:alpha-Linolenic Acid; C011867:4-hydroxyphenylethanol; C025473:gamma-sitosterol; C006552:kaempferol; D011794:Quercetin; D014641:Vanillic Acid; D012603:Scopoletin; D010626:Phenylethyl Alcohol