title: [Studies on constituents from root and stem of Ervatamia hainanensis].
abstract: OBJECTIVE
  To investigate the constituents of Ervatamia hainanensis systematically.
  
  
  METHODS
  Various chromatographic techniques were applied to isolate and purify the constituents of this plant. The structures were elucidated by spectroscopic analysis.
  
  
  RESULTS
  Eight compounds were obtained, which were identified as alpha-amyrin acetate (1), 11-oxo-alpha-amyrin acetate (2), beta-sitosterol (3), cycloart-23-ene-3beta, 25-diol(4), cycloart-25-ene-3beta, 24-diol (5), 5alpha, 8alpha-epidioxyergosta-6, 22-dien-3beta-ol (6), ibogamin-3-one (7), beta-daucosterol (8).
  
  
  CONCLUSIONS
  Compounds 1, 2, 4- 7 were isolated from this plant for the first time.
authors.affiliation: College of Lfe Science, Northwest Agriculture and Forestry University, Yangling 712100, China.
authors.forename: Jian-Peng
authors.initials: JP
authors.lastname: Huang
authors.forename: Yang-Min
authors.initials: YM
authors.lastname: Ma
authors.forename: Jian-Shuang
authors.initials: JS
authors.lastname: Jiang
authors.forename: Pei-Cheng
authors.initials: PC
authors.lastname: Zhang
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D004875:Ergosterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C503471:5alpha,8alpha-epidioxyergosta-6,22-dien-3-beta-ol; C102764:9,19-cycloart-23-ene-3,25-diol; D014315:Triterpenes; D009828:Oleanolic Acid; C036380:beta-amyrin; D004875:Ergosterol