title: [Alkaloids from the root of Lindera angustifolia].
abstract: OBJECTIVE
  To study the alkaloid constituents of the root of Lindera angustifolia Cheng.
  
  
  METHODS
  The constituents were isolated and purified by column chromatography and the structures were characterized by spectral analysis.
  
  
  RESULTS
  Seven aporphine alkaloids, laurotetanine (I), N-methyllaurotetanine (II), boldine (III), isoboldine (IV), norboldine (V), N-ethoxycarbonyllaurotetanine (VII) and a quaternary isoquinoline alkaloid, magnocurarine (VI), were isolated and identified. The structure of VII was further identified by semi-synthesis with I as starting material.
  
  
  CONCLUSIONS
  All compounds were obtained from this plant for the first time and compound VII was found as a naturally occurring compound for the first time.
authors.affiliation: Institute of Pharmacology and Toxicology, Academy of Military Medical Science, Beijing 100850, China.
authors.forename: Qi-Zhi
authors.initials: QZ
authors.lastname: Zhao
authors.forename: Yi-Min
authors.initials: YM
authors.lastname: Zhao
authors.forename: Ke-Jun
authors.initials: KJ
authors.lastname: Wang
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D001060:Aporphines / Q000737:chemistry / Q000302:isolation & purification*; D007546:Isoquinolines / Q000737:chemistry / Q000302:isolation & purification; D027443:Lindera / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D001060:Aporphines; D007546:Isoquinolines; C048506:magnocurarine; C011686:boldine; C464744:isoboldine; C008256:laurotetanine