title: [A new flavonoid from heartwood of Caesalpinia sappan].
abstract: OBJECTIVE
  To seek for new active components from Caesalpinia sappan.
  
  
  METHODS
  The chemical constituents were isolated and identified by means of chromatographic and spectroscopic technologies methods.
  
  
  RESULTS
  Nine compounds were isolated, and their structures were identified as 3, 8-dihydroxy4, 10-dimethoxy-7-oxo-[2] benzopyrano[4,3-b] benzopyran (1), 3-deoxysappanchalcone (2), sappanchalcone (3), 3-deoxysappanone B (4), rhamnetin (5), protosappanin C (6), 3, 7-dihydroxy-chroman-4-one (7), dimethyl adipate (8), daucosterin (9).
  
  
  CONCLUSIONS
  Compound 1 was a new compound, and compounds 7, 8 were isolated from this plant for the first time.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Bioactive Substances and Resources of Chinese Herbal Medicine, Ministry of Education, Beijing 100050, China.
authors.forename: Shi-Hui
authors.initials: SH
authors.lastname: Shu
authors.forename: Jing-Lan
authors.initials: JL
authors.lastname: Han
authors.forename: Guan-Hua
authors.initials: GH
authors.lastname: Du
authors.forename: Hai-Lin
authors.initials: HL
authors.lastname: Qin
mesh_terms: D000818:Animals; D029911:Caesalpinia / Q000737:chemistry*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D005419:Flavonoids / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: C540313:3,8-dihydroxy-4,10-dimethoxy-7-oxo-(2)-benzopyrano(4,3-b)benzopyran; D004365:Drugs, Chinese Herbal; D005419:Flavonoids