title: [Studies on the chemical constituents of Knoxia corymbosa].
abstract: OBJECTIVE
  To study the chemical constituents of Knoxia corymbosa Willd.
  
  
  METHODS
  Chromatography was used to isolate and purify the chemical constituents, their structures were identified by spectral analysis.
  
  
  RESULTS
  Four flavonol glycosides were identified as quercetin-7-O-alpha-L-arabinosyl-3-O-beta-D-6"-acetylglucopyranoside (1), kaempferol-7-O-alpha-L-arabinosyl-3-O-beta-D-glucopyranoside (2), quercetin-3-O-beta-D-glucopyranoside (3), quercetin-3-O-beta-D-6"-acetylglucopyranoside (4).
  
  
  CONCLUSIONS
  Compound 1 is a new flavonol glycoside. The other flavonol glycosides were isolated from Knoxia corymbosa Willd for the first time.
authors.affiliation: School of Pharmacy, Yunnan University, Kunming 650091, China.
authors.forename: Yu-bo
authors.initials: YB
authors.lastname: Wang
authors.forename: Jing-feng
authors.initials: JF
authors.lastname: Zhao
authors.forename: Gan-peng
authors.initials: GP
authors.lastname: Li
authors.forename: Jing-hua
authors.initials: JH
authors.lastname: Yang
authors.forename: Liang
authors.initials: L
authors.lastname: Li
mesh_terms: D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D008968:Molecular Conformation; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*; D019666:Rubiaceae / Q000737:chemistry*
chemical_list: D005960:Glucosides; C495712:quercetin-7-O-arabinosyl-3-O-6''-acetylglucopyranoside; D011794:Quercetin; C110309:quercetin 3-O-glucopyranoside