title: [Study on the alkaloids in the stems and leaves of Stephania cepharantha (II)].
abstract: OBJECTIVE
  To study the alkaloids in the stems and leaves of Stephania cepharantha Hayata.
  
  
  METHODS
  The dried stems and leaves of Stephania cepharantha Hayata 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
  Five alkaloids were obtained and identified as, Stephasunoline (I) Aknadinine (II), Discretamine (III), Acutumine (IV), Sinomenine (V).
  
  
  CONCLUSIONS
  Compounds I, III, IV are isolated from this plant for the first time, and compound IV is isolated from the genus for the first time.
authors.affiliation: The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, China. heli5179@163.com
authors.forename: Li
authors.initials: L
authors.lastname: He
authors.forename: Yuan-Hu
authors.initials: YH
authors.lastname: Zhang
authors.forename: Li-Jia
authors.initials: LJ
authors.lastname: Tang
authors.forename: Shao-Hui
authors.initials: SH
authors.lastname: Song
authors.forename: Qian-Yun
authors.initials: QY
authors.lastname: Sun
mesh_terms: D000470:Alkaloids / Q000032:analysis / Q000302:isolation & purification*; D001600:Berberine Alkaloids / Q000032:analysis / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D009019:Morphinans / Q000032:analysis / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D013141:Spiro Compounds / Q000032:analysis / Q000302:isolation & purification; D031607:Stephania / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D001600:Berberine Alkaloids; D009019:Morphinans; D013141:Spiro Compounds; C442344:acutumine; C099121:aknadinine; C010941:discretamine; C009271:sinomenine