title: [Studies on the chemical constituents in root of Rheum rhizastachyum].
abstract: OBJECTIVE
  To investigate the chemical constituents from the root and rhizome of Rheum rhizastachyum.
  
  
  METHODS
  The compounds were isolated by column chromatography on silica gel, Sephadex LH-20, MCI-gel CHP-20P separately and their structures were elucidated by chemical and spectral technology.
  
  
  RESULTS
  Six compounds were isolated and identified as chrysophanol, emodin, gallic acid, sucrose, 1-O-beta-D-glucopyranosyl-chrysophanols, 1-O-beta-D-glucopyranosyl-emodin.
  
  
  CONCLUSIONS
  All the compounds were obtained from this plant for the first time.
authors.affiliation: College of Pharmacy, Xinjiang Medical University, Urumuqi 830054, Xinjiang, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.forename: Jun-min
authors.initials: JM
authors.lastname: Chang
authors.forename: Nian-sheng
authors.initials: NS
authors.lastname: Du
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D004642:Emodin / Q000737:chemistry / Q000302:isolation & purification*; D005707:Gallic Acid / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry
chemical_list: D000880:Anthraquinones; D005707:Gallic Acid; D004642:Emodin; C027113:chrysophanic acid