title: [Studies on chemical constituents from Ipomoea batatas].
abstract: OBJECTIVE
  To investigate the chemical constituents of Ipomoea batatas.
  
  
  METHODS
  Silica gel column chromatography and Sephadex LH-20 were used to separate and purify the compounds from the EtOAc and n-BuOH soluble fraction of ethanol extracts. The chemical structures were elucidated on the basis of physic-chemical properties and spectral data.
  
  
  RESULTS
  Four compounds were isolated and identify as citrusin C (1), caffeicacid (2), 3,4-di-O-caffeoylquinic acid (3), 1,2,3,4-tetrahydro-beta-carboline-3-carboylic acid (4).
  
  
  CONCLUSIONS
  Compounds 1-4 are isolated for the first time from I. batatas.
authors.affiliation: Department of Chinese Medicine and Analysis, Guangdong Pharmaceutical University, Guangzhou 510006, China.
authors.forename: Yong-Qin
authors.initials: YQ
authors.lastname: Yin
authors.forename: Zhi-Bin
authors.initials: ZB
authors.lastname: Shen
authors.forename: Ling-Yi
authors.initials: LY
authors.lastname: Kong
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D002109:Caffeic Acids / Q000737:chemistry / Q000302:isolation & purification*; D002243:Carbolines / Q000737:chemistry / Q000302:isolation & purification; D002726:Chlorogenic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D027723:Ipomoea batatas / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000470:Alkaloids; D002109:Caffeic Acids; D002243:Carbolines; D002726:Chlorogenic Acid; C054910:1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid; C062044:citrusinine I; C478100:3,4-di-O-caffeoylquinic acid; C040048:caffeic acid