title: Studies on chemical constituents of Rheum glabricaule.
abstract: OBJECTIVE
  To study the chemical Constituents in the root of Rheum glabricaule.
  
  
  METHODS
  Compounds were isolated by various column chromatographies with sillica gel. Their structures were identified by spectral analysis (MS, 1HNMR, 13 CNMR) and chemical evidences.
  
  
  RESULTS
  Seven compounds were isolated from this plant, including n-hexacosnic acid (I), palmitic acid (II), daucosterol (III), chrysophanol-8-Me ether (IV), citreorosein (V), chrysophanol 8-O-beta-D-glucopyranoside (VI) and 2,5-dimethyl-7-methoxychromone (VII).
  
  
  CONCLUSIONS
  All above compounds are obtained from this plant for the first time.
authors.affiliation: Department of Pharmacy, First Hospital of Lanzhou University, Lanzhou.
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Wei
authors.forename: Xin'an
authors.initials: X
authors.lastname: Wu
authors.forename: Chengzhong
authors.initials: C
authors.lastname: Zhang
authors.forename: Chong
authors.initials: C
authors.lastname: Li
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D019308:Palmitic Acid / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000880:Anthraquinones; D002867:Chromones; D012855:Sitosterols; D019308:Palmitic Acid; C011015:lyoniside