title: [Research of the amounts of flavonoids accumulated in the crude drug of single-styled hawthorn].
abstract: Leaves, flowers and fruits of single-styled hawthorn are used for production of pharmaceuticals with cardiotonic, coronary vasodilatoric and hypotensive action. Amount of flavonoids accumulated in crude drug of hawthorn is a parameter of quality.
  
  
  OBJECTIVE
  To establish the difference in amounts of flavonoids accumulated in the crude drug of single-styled hawthorn.
  
  
  METHODS
  Different examples of crude material from some Lithuanian regions were extracted with ethanol; flavonoids were measured by spectroscopic method and by HPLC (high performance liquid chromatography).
  
  
  RESULTS
  From 0.77% to 2.80% of flavonoids are determined in the leaves and flowers; amounts of hyperosid were 0.16-0.87%; vitexin-o-rhamnosid 0.14-0.40%; rutin 0.10-0.19%. Flavonoids maximum percent was determinate in crude material examples collected at the single-styled hawthorn flowering time; the decline of amounts of flavonoids accumulated in the crude material of hawthorn was determined from May to August (realization of correlation coefficient r=-0.90). Hyperosid maximum percent was determined in crude material examples collected at flowering time; the decline of amounts of hyperosid accumulated in the crude material was determined from May to August (r=-0,94). Amounts of rutin and vitexin-o-rhamnosid in leaves were less than flowers; there was the decline of amounts of rutin and vitexin-o-rhamnosid in leaves from May to August. The percent of flavonoids 0.09 to 0.24 is determined in fruits.
  
  
  CONCLUSIONS
  Lithuanian single-styled hawthorn populations can supply quality crude material from May to August; the bigger amounts of flavonoids were determined in crude drug examples collected at flowering time.
authors: Department of Pharmaceutical Chemistry and Pharmacognosy, Kaunas University of Medicine, Kaunas, Lithuania. farmakog@kmu.lt
authors: Valdas
authors: V
authors: Jakstas
authors: Valdimaras
authors: V
authors: Janulis
authors: Juozas
authors: J
authors: Labokas
authors: Saulius
authors: S
authors: Kazlauskas
authors: Raimondas
authors: R
authors: Benetis
authors: Gene
authors: G
authors: Puodziūniene
mesh_terms: D002851:Chromatography, High Pressure Liquid; D027825:Crataegus / Q000737:chemistry*; D003627:Data Interpretation, Statistical; D005419:Flavonoids / Q000032:analysis*; D035264:Flowers / Q000737:chemistry; D006801:Humans; D008097:Lithuania; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D012621:Seasons
chemical_list: D005419:Flavonoids; D010936:Plant Extracts; C007145:crataegus extract