title: [Dihydroflavonol glycosides and flavan-3-ols from Bauhinia aurea].
abstract: OBJECTIVE
  To study the chemical constituents of Bauhinia aurea.
  
  
  METHODS
  The compounds were isolated by column chromatography over silica gel, reversed-phase RP-18, and Sephadex LH -20. MS and NMR spectroscopic methods were used to determine structures of purified compounds.
  
  
  RESULTS
  Eight compounds were isolated from the ethyl acetate soluble fraction of the ethanolic extract and their structures were elucidated as isoengeletin (1), astilbin (2), neoastilbin (3), isoastilbin (4), neoisoastilbin (5), (+)-catechin (6), (-)-epicatechin (7) and (-)-epicatechin 3-O-gallate (8).
  
  
  CONCLUSIONS
  Five compounds were isolated from this genus for the first time except for 2, 6 and 8.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100050, China.
authors.forename: Xiao-Ya
authors.initials: XY
authors.lastname: Shang
authors.forename: Shuai
authors.initials: S
authors.lastname: Li
authors.forename: Su-Juan
authors.initials: SJ
authors.lastname: Wang
authors.forename: Yong-Chun
authors.initials: YC
authors.lastname: Yang
authors.forename: Jian-Gong
authors.initials: JG
authors.lastname: Shi
mesh_terms: D036481:Bauhinia / Q000737:chemistry*; D002392:Catechin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D002850:Chromatography, Gel; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D044948:Flavonols; C520363:neoastilbin; C099069:astilbin; D002392:Catechin; C062669:epicatechin gallate