title: [Study on flavonoids from leaf of Ipomoea batatas].
abstract: OBJECTIVE
  To investigate the flavonoid constituents of Ipomoea batatas.
  
  
  METHODS
  The leaf was extracted with EtOH and partitioned with CHCl3, EtOAc and n-BuOH respectively. The chemical components of EtOAc fraction were isolated by silica gel and sephadex LH-20 column chromatography. The chemical structures were elucidated on the basis of physic-chemical properties and spectral data.
  
  
  RESULTS
  Five compounds were isolated and identified as: tiliroside (I), astragalin (II), rhamnocitrin (III), rhamnetin (IV) and kaempferol (V).
  
  
  CONCLUSIONS
  All of these five compounds were obtained from this plant for the first time.
authors: Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210038, China.
authors: Jian-guang
authors: JG
authors: Luo
authors: Ling-yi
authors: LY
authors: Kong
mesh_terms: D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids; D027723:Ipomoea batatas / Q000737:chemistry*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D001578:Benzopyrans; D005419:Flavonoids; D044949:Kaempferols; C052083:tiliroside; C063423:rhamnetin; D011794:Quercetin; C001579:astragalin