title: [Isolation and structure identification of lignans from pine needles of pinus massoniana Lamb].
abstract: OBJECTIVE
  To study the chemical constituents from the water-extracts of pine needles of Pinus massoniana Lamb.
  
  
  METHODS
  Chromatographic techniques were used to separate and purify compounds. Their physico-chemical properties and spectral data (UV, IR, MS, 1H-1H, 13C-1H NMR, DEPT, HMBC etc.) were used to elucidate the structures.
  
  
  RESULTS
  Three lignans were isolated from the n-BuOH fraction of water-extracts. Their structures were identified as (7S,8R)-3',4,9'-tridihydroxy-4-methoxy- 9-O-shikimoyl-7,8-dihydrobenzofuran-1'-propylneolignan (massonianoid A, I), (7S,8R)-4,9-dihydroxy-3,3'-dimethoxy-7,8- dihydrobenzofuran-1'-propylneolignan (II) and 4,4',8-trihydroxy-4,4'-dimethoxy-9-lignanolide (III).
  
  
  CONCLUSIONS
  Compound I is a new compound. While II and III were isolated from this plant for the first time.
authors.affiliation: Henan College of Traditional Chinese Medicine, Zhengzhou 450008, China. fwsh@371.net
authors.forename: Wei-sheng
authors.initials: WS
authors.lastname: Feng
authors.forename: Xiao-ke
authors.initials: XK
authors.lastname: Zheng
authors.forename: Yan-zhi
authors.initials: YZ
authors.lastname: Wang
authors.forename: Yue-feng
authors.initials: YF
authors.lastname: Bi
mesh_terms: D005663:Furans / Q000737:chemistry / Q000302:isolation & purification; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D028223:Pinus / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: C489700:(7S,8R)-3',4,9'-tridihydroxy-4-methoxy- 9-O-shikimoyl-7,8-dihydrobenzofuran-1'-propylneolignan; D005663:Furans; D017705:Lignans; C020436:nortrachelogenin