title: [Research on chemical constituents from stem of Gymnema sylvestre].
abstract: OBJECTIVE
  To study on the chemical constituents from the stem of Gymnema sylvestre.
  
  
  METHODS
  The constituents were extracted by percolation with ethanol. Then the extract was separated by systemic solvent separation methods. The part of n-butanol extract was isolated and purified by macroporous adsorptive resins, silica gel column chromatography, sephadex gel column chromatography and recrystallization. The isolated compounds were identified by spectrum methods.
  
  
  RESULTS
  Eight compounds were isolated and identified as fallows: Conduritol A(I), 1-Heptadecanol(II), Stigmasterol glucoside(III), 1-Quercitol(IV), 1-Octadecanol(V), Potassium nitrate(VI), Lupeol cinnamate(VII), Stigmasterol(VIII).
  
  
  CONCLUSIONS
  Chemical compounds II, III, V, VII are firstly obtained from this plant.
authors.affiliation: College of Pharmaceutical, Guangxi Traditional Chinese Medical University, Nanning 530001, China. 8zhen@163.com
authors.forename: Han-shen
authors.initials: HS
authors.lastname: Zhen
authors.forename: Xue-yan
authors.initials: XY
authors.lastname: Zhu
authors.forename: Ru-mei
authors.initials: RM
authors.lastname: Lu
authors.forename: Jie
authors.initials: J
authors.lastname: Liang
authors.forename: Qin
authors.initials: Q
authors.lastname: Qiu
authors.forename: Qi-miao
authors.initials: QM
authors.lastname: Meng
mesh_terms: D005233:Fatty Alcohols / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D031104:Gymnema sylvestre / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009566:Nitrates / Q000737:chemistry / Q000302:isolation & purification; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry / Q000302:isolation & purification; D013265:Stigmasterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D005233:Fatty Alcohols; D005960:Glucosides; D009566:Nitrates; D017680:Potassium Compounds; C464587:stigmasterol glucoside; C009316:stearyl alcohol; D013265:Stigmasterol; C023844:potassium nitrate