title: [Chemical constituents in the root of Cynanchum auriculatum].
abstract: OBJECTIVE
  To study on the chemical constituents of root of Cynanchum auriculatum Royle ex Wight.
  
  
  METHODS
  The constituents were isolated and purified by various chromatographic methods, and the spectroscopic methods (MS, NMR) were used to identify their sturctures.
  
  
  RESULTS
  Seven compounds were obtained and identified as: taraxasterol acetate (I), cynanchone A (II), succinic acid (III), betulinic acid (IV), kidjoranin (V), wilfoside CIN (VI), wilfoside KIN (VII).
  
  
  CONCLUSIONS
  Compounds I-IV are isolated from this plant for the first time.
authors.affiliation: Jiangsu Institute of Botany, CAS, Nanjing Botanical Garden Mem. Sun Yat-Sen., Nanjing 210014, China.
authors.forename: Min
authors.initials: M
authors.lastname: Yin
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Wang
authors.forename: Yun-fa
authors.initials: YF
authors.lastname: Dong
authors.forename: Bing
authors.initials: B
authors.lastname: Xia
authors.forename: Xu
authors.initials: X
authors.lastname: Feng
mesh_terms: D031105:Cynanchum / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D008970:Molecular Weight; D053978:Pentacyclic Triterpenes; D035281:Plant Tubers / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification*; D019802:Succinic Acid / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000094062:Betulinic Acid
chemical_list: D006027:Glycosides; D053978:Pentacyclic Triterpenes; D013261:Sterols; D014315:Triterpenes; C092740:taraxasteryl acetate; D019802:Succinic Acid; D000094062:Betulinic Acid