title: [Studies on quality standards of radix Angelicae dahuricae].
abstract: OBJECTIVE
  To work out a qualitay standard of Radix Angelicae dahuricae.
  
  
  METHODS
  TLC and HPLC were adopted.
  
  
  RESULTS
  Four coumerin compounds were identified by TLC, and the contents of two compounds were determined by HPLC.
  
  
  CONCLUSIONS
  Imperatorin, isoimperatorin, byakangelicin and oxypeucedaninhydrate can be found simultaneously in Radix Angelicae dahuricae. The contents of imperatorin and isoimperitorin are not lower than 0.1% and 0.04% respectively.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700, China. X.heqi@yeah.net
authors.forename: Yong-qing
authors.initials: YQ
authors.lastname: Xiao
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Xiao-lin
authors.initials: XL
authors.lastname: You
authors.forename: Cun
authors.initials: C
authors.lastname: Zhang
authors.forename: Masahiko
authors.initials: M
authors.lastname: Taniguci
authors.forename: Kimiye
authors.initials: K
authors.lastname: Baba
mesh_terms: D029969:Angelica / Q000737:chemistry*; D011564:Furocoumarins / Q000032:analysis*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control
chemical_list: D011564:Furocoumarins; C055542:isoimperatorin; C434685:9-(2,3-dihydroxy-3-methylbutoxy)-4-methoxy-7H-furo(3,2-g)(1)benzopyran-7-one; C031534:imperatorin