title: [Chemical constituents from Corydalis yanhusuo].
abstract: OBJECTIVE
  To study the chemical constituents from the 60% ethanol extract of Corydalis yanhusuo.
  
  
  METHODS
  The chemical constituents were separated and purified by various chromatographic techniques, and their structures were elucidated by chemical evidence and spectroscopic analysis.
  
  
  RESULTS
  Nine alkaloids were obtained and determined as 7-formyldidehydroglaucine (1), nantenine (2), (+)-O-methylbulbocapnine (3), d-corydaline (4), tetrahydrocoptisine (5), 8-oxocoptisine (6), palmatine (7), tetrahydropalmatine (8), and dehydrocorydaline (9), respectively.
  
  
  CONCLUSIONS
  Compound 1 was obtained from natural products for the first time, and its NMR data were firstly reported. Compound 3 was reported from Papaveraceae for the first time, and compound 6 was firstly reported from Corydalis yanhusuo.
authors.affiliation: College of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Tiantian
authors.initials: T
authors.lastname: Hu
authors.forename: Xue
authors.initials: X
authors.lastname: Zhang
authors.forename: Shizhong
authors.initials: S
authors.lastname: Ma
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Cheng
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Yao
mesh_terms: D000470:Alkaloids / Q000737:chemistry; D031311:Corydalis / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D004365:Drugs, Chinese Herbal