title: [A new paeoniflorin derivative isolated from the root bark ethanol extract of Paeonia suffruticosa].
abstract: OBJECTIVE
  To study the chemical constituents of paeoniflorins from root cortex of the Paeonia suffruticosa.
  
  
  METHODS
  Paeoniflorins were isolated by partition, silica gel column chromatography, medium-pressure RP chromatography and HPLC. Their structures were elucidated by spectroscopic methods including IR, MS and NMR techniques.
  
  
  RESULTS
  Nine paeoniflorins were isolated and identified from the root bark ethanol extract of P. suffruticosa.
  
  
  CONCLUSIONS
  The new compound was identified as paeoniflorin-4-ethyl ether, which may be an artifact produced during extraction proved by simulate experiment.
authors.affiliation: Institute of Materia Medica, Peking Union Medical University and Chinese Academy of Medical Science, Beijing 100050, China.
authors.forename: Su-juan
authors.initials: SJ
authors.lastname: Wang
authors.forename: Yong-chun
authors.initials: YC
authors.lastname: Yang
authors.forename: Shuai
authors.initials: S
authors.lastname: Li
authors.forename: Jian-gong
authors.initials: JG
authors.lastname: Shi
mesh_terms: D001565:Benzoates / Q000737:chemistry / Q000302:isolation & purification*; D001952:Bridged-Ring Compounds / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D029596:Paeonia / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D001565:Benzoates; D001952:Bridged-Ring Compounds; D005960:Glucosides; C510981:paeoniflorin-4-ethyl ether