title: [Chemical constituents of roots of Boehmeria nivea].
abstract: OBJECTIVE
  To investigate the chemical constituents from roots of Boehmeria nivea.
  
  
  METHODS
  The constituents were isolated by repeated column chromatography and preparative liquid chromatography; and their structures were elucidated by chemical properties and spectroscopic analyses.
  
  
  RESULTS
  Seven compounds were isolated and their structures were identified as tormentic acid (1), hederagenin (2), maslinic acid (3), 2alpha-hydroxyursolic acid (4), trans-p-hydroxycinamic acid (5), 2,4,4'-trihydroxychalcone (6), rutin (7).
  
  
  CONCLUSIONS
  Compounds 1-6 were obtained from this genus for the first time.
authors.affiliation: College of Pharmacy, SooChow University, Suzhou, China.
authors.forename: Qiongming
authors.initials: Q
authors.lastname: Xu
authors.forename: Guoqing
authors.initials: G
authors.lastname: Chen
authors.forename: Jinying
authors.initials: J
authors.lastname: Fan
authors.forename: Mengjia
authors.initials: M
authors.lastname: Zhang
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Shilin
authors.initials: S
authors.lastname: Yang
authors.forename: Xiaoran
authors.initials: X
authors.lastname: Li
mesh_terms: D032402:Boehmeria / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000032:analysis*; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000032:analysis; D018517:Plant Roots / Q000737:chemistry*; D014315:Triterpenes / Q000032:analysis
chemical_list: D004365:Drugs, Chinese Herbal; D014315:Triterpenes; D009828:Oleanolic Acid; C412811:maslinic acid; C025763:hederagenin