title: [A new sesqui-norlignan from Herpetospermum pedunculosum].
abstract: OBJECTIVE
  To study the chemical components from the bioactive extract of Herpetospermum pedunculosum, a Tibetan medicinal herb for liver diseases.
  
  
  METHODS
  The isolation and purification of this extract were conducted by means of silica gels column chromatography and preparative HPLC. The structures of the compounds were elucidated based on their physical and chemical features, and spectral data.
  
  
  RESULTS
  Two lignans were isolated from this extract. They were elucidated as herpetone (I), dehydrodiconiferyl alcohol (II).
  
  
  CONCLUSIONS
  Compound I is a new compound with the rare structure of sesqui-norlignan. Compound II is isolated from the genus of Herpetospermum for the first time.
authors.affiliation: Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China. zhangmei63@yahoo.com.cn
authors.forename: Mei
authors.initials: M
authors.lastname: Zhang
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Dong
authors.forename: Yun
authors.initials: Y
authors.lastname: Deng
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Xiao-nian
authors.initials: XN
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Song
mesh_terms: D002850:Chromatography, Gel / Q000379:methods; D002851:Chromatography, High Pressure Liquid; D019662:Cucurbitaceae / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D058428:Silica Gel; D012822:Silicon Dioxide
chemical_list: D017705:Lignans; D010636:Phenols; C526382:herpetone; C080686:dehydrodiconiferyl alcohol; D058428:Silica Gel; D012822:Silicon Dioxide