Fecha de publicación: 17/11/2011 Fuente: WIPO "propolis" The invention relates to propolis containing active substances, whose composition is specific according to the season of harvesting and according to the origin, which is homogenised containing the dry basis of 80 to 99 % by weight, while the dry basis of homogenised propolis contains 0,2 to 1,1 % by weight of benzoic acid, 0,9 to 1,05 % by weight of ferulic acid, 0,15 to 0,35 % by weight of isoferulic acid, 0,038 to 0,051 % by weight of cinnamic acid, 1,4 to 2,22 % by weight of Galangin, 1,4 to 2,52 % by weight of Chrysin, 19,5 to 3,02 % by weight of isoesters, 0,25 to 1,26 Pinobanskin-3-acetate and maximally 0,159 % by weight of tectochrysin.