title: [Study on chemical constituents in seeds of Helicia nilagirica (II)].
abstract: OBJECTIVE
  To study the chemical constituents in seeds of Helicia nilagirica.
  
  
  METHODS
  The ethanol extract was seperated by petroleum ether, dichloromethane, n-butanol in sequence, then isolated by silica gel column chromatography. The structures were identified and elucidated by physicochemical properties and spectral analysis.
  
  
  RESULTS
  Five compounds were isolated from the dichloromethane and n-butanol extracts, identified as p-hydroxybenzaldehyde (1), p-hydroxybenzoic acid (2), gallic acid (3), helicide (4), 4-formylpymyl-O-beta-D-glucopyranoside (5).
  
  
  CONCLUSIONS
  All the compounds except IV were isolated from the plant for the first time. The compounds I, II and III were isolated from the genus Helicia for the first time.
authors.affiliation: Beijing University of Traditional Chinese Medicine, Beijing 100029, China. liuguiyan2001@yahoo.com.cn
authors.forename: Gui-Yan
authors.initials: GY
authors.lastname: Liu
authors.lastname: Shuang-Cheng
authors.forename: Yu-Mei
authors.initials: YM
authors.lastname: Zhang
authors.forename: Ji-Min
authors.initials: JM
authors.lastname: Xu
authors.forename: Rui-Chao
authors.initials: RC
authors.lastname: Lin
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry / Q000302:isolation & purification*; D005707:Gallic Acid / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010226:Parabens / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D039105:Proteaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry
chemical_list: D001547:Benzaldehydes; D010226:Parabens; D005707:Gallic Acid; C055677:helicide; C011483:4-hydroxybenzaldehyde