title: [Studies on chemical constituents in root tuber of Cynanchum auriculatum].
abstract: OBJECTIVE
  To study chemical constituents from Cynanchum auriculatum.
  
  
  METHODS
  The chemical components were isolated and purified by silca gel, sephedex-LH-20 and ODS column chromatography. The chemical structures were elucidated on the basis of physicochemical properties and spectral data.
  
  
  RESULTS
  Thirteen compounds were isolated and identified as: caudatin (1), metaplexigenin (2), cynauricuoside A (3), succinic acid (4), azelaic acid (5), wilforibiose (6), sucrose (7), 1-O-hexadecanolenin (8), beta-amyrin acetate (9), cynanchone A (10), acetylquinol (11), beta-sitosterol (12), daucosterol (13).
  
  
  CONCLUSIONS
  Compounds 4-9 were obtained from this plant for the first time.
authors.affiliation: Department of Pharmacy, China Pharmaceutical University, Nanjing 210028, China.
authors.forename: Jian-feng
authors.initials: JF
authors.lastname: Zhang
authors.forename: You-bin
authors.initials: YB
authors.lastname: Li
authors.forename: Cheng-lu
authors.initials: CL
authors.lastname: Li
authors.forename: Jian-qin
authors.initials: JQ
authors.lastname: Jiang
mesh_terms: D031105:Cynanchum / Q000737:chemistry*; D003998:Dicarboxylic Acids / Q000737:chemistry / Q000302:isolation & purification*; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D035281:Plant Tubers / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D019802:Succinic Acid / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D003998:Dicarboxylic Acids; D009828:Oleanolic Acid; D019802:Succinic Acid; C000265:beta-amyrin acetate; C010038:azelaic acid