title: [Low Polar Constituents from Annona squamosa Fruit Pericarp].
abstract: OBJECTIVE
  To study the low polar constituents from Annona squamosa fruit pericarp.
  
  
  METHODS
  The fruit pericarp was percolated with 95% EtOH at room temperature. The extract was subjected to Silica gel chromatography and eluted with gradually more polar and EtOAc-MeOH mixtures. The part eluted range Pet-EtOAc from 5:1 to 1:1 was subjected to repeated column chromatography. The constituents were identified by physicochemical property and NMR data.
  
  
  RESULTS
  Eight constituents were isolated and identified as tricosane(1), β-sitosterol(2), succinic acid (3), annosquamosin D(4), 4α-hydroxy-19-nor-(E)-kauran-17-oic acid(5), (E)-16β, 17-dihydroxy-kauran-19-oic acid(6), (E)-16α, 17-dihydroxy-kauran-19-oic acid(7), and 16β-hydroxy-17-acetoxy-(E)-kauran-19-oic acid(8).
  
  
  CONCLUSIONS
  All constituents are firstly isolated from Annona squamosa fruit pericarp except compound 6.
authors.forename: Ya-yun
authors.initials: YY
authors.lastname: Chen
authors.forename: Gang-gang
authors.initials: GG
authors.lastname: Bai
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
mesh_terms: D031041:Annona / Q000737:chemistry*; D004224:Diterpenes; D005638:Fruit / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal / Q000737:chemistry*; D012855:Sitosterols; D019802:Succinic Acid
chemical_list: D004224:Diterpenes; D012855:Sitosterols; C011888:kauranoic acids; C025473:gamma-sitosterol; D019802:Succinic Acid