title: [Ligans from branch of Hypericum petiolulatum].
abstract: OBJECTIVE
  To investigate the chemical constituents of Hypericum petiolulatum.
  
  
  METHODS
  The chemical constituents were isolated and purified by column chromatography on silica gel, macroporous adsorbent resin, Sephadex LH-20, and preparative HPLC. Structures of the compounds were identified by NMR and MS spectroscopic methods.
  
  
  RESULTS
  Nine lignans were obtained and their structures were elucidated as (-)-(2R, 3R)-1-O-feruloyl-8,8'-bisdihydrosiringenin (1), (-) -secoisolariciresinol 4-O-beta-D-glucopyrano-side (2), isolariciresinol-beta-4'-O-beta-D-glucopyranoside (3), 5-methoxy-9beta-xylopyra-nosyl-(+) -isolariciresinol (4), (+) -lyoniresinol 2alpha-O-beta-D-xylopyranoside (5), 5-methoxy-9-beta-xylopyranosyl-(-) -isolariciresinol (6), isolariciresinol 6a-O-beta-D-gluco-side (7), (+)-lyoniresinol 3alpha-O-beta-D-xylopyranoside (8) and 7-methoxy-5-benzofuranpropanol 4'-O-beta-D-glucopyranoside (9).
  
  
  CONCLUSIONS
  Coupound 1 was new and compounds 2-9 were obtained from the genus Hypericum for the first time.
authors.affiliation: Department of Pharmacy, People's Hospital of Daqing City, Daqing 163316, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhao
authors.forename: Juan
authors.initials: J
authors.lastname: Liu
authors.forename: Funan
authors.initials: F
authors.lastname: Wang
authors.forename: Guifan
authors.initials: G
authors.lastname: Liu
authors.forename: Guizhi
authors.initials: G
authors.lastname: Wang
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry; D020902:Hypericum / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry
chemical_list: D004365:Drugs, Chinese Herbal; D017705:Lignans