Fecha de publicación: 01/12/1993 Fuente: WIPO "propolis" The invention concerns compounds with general formula (I), where R is the same or different and represents H, OH or (a), for use as an antibacterial, antiviral or immunostimulating agent or wound healing factor. A process for preparing a mixture containing these substances is disclosed, whereby a propolis containing product such as an organic solvent, preferably an alcoholic solution containing propolis, is added to water or a water solution containing 0,1-17 weight % of NaCl with a temperature of 30-95 °C, and the mixture is kept at 30-95 °C for 10-100 hours, whereafter the solution is freed from the bottom sediment. The invention also concerns a composition for human or veterinary use containing at least one of the substances with formula (I) or produced with the process in a pharmaceutically acceptable carrier.