title: The chemical constituents of Rhododendron ovatum Planch.
abstract: OBJECTIVE
  To study the chemical constituents of Rhododendron ovatum Planch.
  
  
  METHODS
  The chemical constituents were isolated and purified by silica gel column chromatography and identified on the basis of their physiochemical and spectral data.
  
  
  RESULTS
  Seven compounds were isolated and identified. Their structures were established as 3,5,7-trihydroxylchromone 3-O-beta-D-xylopyranoside (I), taraxerol (II), beta-sitosterol (III), betulinic acid (IV), quercetin (V), quercetin-3-O-alpha-L-rhamnopyranoside (VI), and D-glucose (VII).
  
  
  CONCLUSIONS
  Compound I is a new compound. Compounds II-VII 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, Beijing 100050, China.
authors.forename: Zi-ming
authors.initials: ZM
authors.lastname: Feng
authors.forename: Ying-hong
authors.initials: YH
authors.lastname: Wang
authors.forename: Pei-cheng
authors.initials: PC
authors.lastname: Zhang
mesh_terms: D002839:Chromans / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides; D008968:Molecular Conformation; D015394:Molecular Structure; D009005:Monosaccharides / Q000737:chemistry / Q000302:isolation & purification*; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D029793:Rhododendron / Q000737:chemistry*
chemical_list: C509384:3,5,7-trihydroxylchromone 3-O-beta-D-xylopyranoside; D002839:Chromans; D006027:Glycosides; D009005:Monosaccharides; C509385:quercetin-3-O-alpha-L-rhamnopyranoside; D009828:Oleanolic Acid; D011794:Quercetin; C005802:taraxerol