Christov Roumen, Trusheva Boryana, Popova Milena, Bankova Vassya, Bertrand Michel
Regional Center for Mass Spectrometry, Department of Chemistry, University of Montreal, Quebec, Canada.
Nat Prod Res. 2006 May 20;20(6):531-6. doi: 10.1080/14786410500056918.
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.
北方森林和太平洋沿岸森林，这两个地区位于通常的蜂胶源植物——黑杨分布区域之外。在维多利亚的样本中，对羟基苯乙酮、苄基羟基苯甲酸酯和肉桂酸是主要成分，同时还有大量二氢查耳酮，这有助于确定其植物来源：青杨派的毛果杨。三种二氢查耳酮是蜂胶中的新成分。列治文的样本以大量对香豆酸和肉桂酸为特征，这是银白杨亚组颤杨派杨树的典型特征，其植物来源被确定为颤杨。两个样本对DPPH均表现出良好的自由基清除活性。显然，北方型蜂胶是一种有前景的生物活性物质潜在来源，值得进一步研究。
