title: [Alkaloids in stems and leaves of Stephania cepharantha].
abstract: OBJECTIVE
  To study the alkaloids in the stems and leaves of Stephania cepharantha.
  
  
  METHODS
  The dried stems and leaves of S. cepharantha were percolated with 95% ethanol and the solvent was removed by rotary evaporation to give a concentrate, and the concentrate was extracted by petroleum ether and chloroform. Column chromatograghy on MCI CHP 20P, silica gel, Rp-18, Sephadex LH-20 and polyamide were applied for the isolation and purification of the chloroform fraction. The structures were elucidated by their physicochemical properties and spectral data.
  
  
  RESULTS
  Eleven alkaloids were obtained and identified as lysicamine (1), tetrahadropalmatine (2), palmatine (3), isocorydione (4), corydalmine (5), corypalmine (6), sinoracutine (7), sinoacutine (8), cepharamine (9), isocorydine (10) and corydine (11).
  
  
  CONCLUSIONS
  Compounds 2-7 were isolated from S. cepharantha for the first time, and compound 7 was isolated from the genus Stephania for the first time, compound 4 was isolated from the Menispermaceae family for the first time.
authors: School of Chemistry and Material Science of Guizhou Normal University, Guiyang 550001, China.
authors: Li
authors: L
authors: He
authors: Yuanhu
authors: Y
authors: Zhang
authors: Lijia
authors: L
authors: Tang
authors: Shaohui
authors: S
authors: Song
authors: Qianyun
authors: Q
authors: Sun
mesh_terms: D000470:Alkaloids / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D031607:Stephania / Q000737:chemistry*
chemical_list: D000470:Alkaloids