title: Chemical composition of propolis from Canada, its antiradical activity and plant origin.
abstract: The chemical composition of propolis from two regions in Canada was studied: Boreal forest and Pacific coastal forest that lay outside the area of distribution of Aigeiros poplars, the usual propolis source plants. In the sample from Victoria, p-hydroxyacetophenone, benzyl hydroxybenzoate and cinnamic acid were the major components, accompanied by significant amounts of dihydrochalcones, which allowed the identification of its plant source: Populus trichocarpa of Section Tacamahaca. Three dihydrochalcones were new for propolis. The sample from Richmond was characterized by large amounts of p-coumaric and cinnamic acid, typical for poplars of Section Leuce, subsection Trepidae, its plant source was identified as P. tremuloides. Both samples showed good radical scavenging activity against DPPH. Obviously, Northern type propolis is a promising potential source of biologically active substances and deserves further investigation.
authors.affiliation: Regional Center for Mass Spectrometry, Department of Chemistry, University of Montreal, Quebec, Canada.
authors.forename: Roumen
authors.initials: R
authors.lastname: Christov
authors.forename: Boryana
authors.initials: B
authors.lastname: Trusheva
authors.forename: Milena
authors.initials: M
authors.lastname: Popova
authors.forename: Vassya
authors.initials: V
authors.lastname: Bankova
authors.forename: Michel
authors.initials: M
authors.lastname: Bertrand
mesh_terms: D000098:Acetophenones / Q000032:analysis; D000890:Anti-Infective Agents / Q000032:analysis; D001713:Biphenyl Compounds / Q000737:chemistry; D001955:British Columbia; D002599:Chalcone / Q000031:analogs & derivatives / Q000032:analysis; D047188:Chalcones; D002934:Cinnamates / Q000032:analysis; D003373:Coumaric Acids / Q000032:analysis; D016166:Free Radical Scavengers / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006834:Hydrazines / Q000737:chemistry; D062385:Hydroxybenzoates / Q000032:analysis; D010851:Picrates; D011422:Propionates; D011429:Propolis / Q000032:analysis*; D011792:Quebec; D014197:Trees
chemical_list: D000098:Acetophenones; D000890:Anti-Infective Agents; D001713:Biphenyl Compounds; D047188:Chalcones; D002934:Cinnamates; D003373:Coumaric Acids; D016166:Free Radical Scavengers; D006834:Hydrazines; D062385:Hydroxybenzoates; D010851:Picrates; D011422:Propionates; C029010:cinnamic acid; D002599:Chalcone; D011429:Propolis; C004931:1,1-diphenyl-2-picrylhydrazyl; C031335:4-hydroxyacetophenone; C015812:dihydrochalcone; C495469:p-coumaric acid