Abstract: This invention relates to pharmaceutically active compounds consisting of an isoflavone or isoflavone-glycoside and an amino acid, a peptide or peptide derivate with 2 to 5 amino acids which is covalently bonded to these, as well as pharmaceutically acceptable salts or solvates of these compositions as well as to the use of those substances for the production of pharmaceutical compositions, in particular for the treatment of thrombocyte aggregation and tumor therapy. Consequently, the areas of application of the invention are medicine and the pharmaceutical industry. The compounds according to the invention have the general formula (I). X-Pep??(I) whereupon X is an isoflavone or isoflavone-glycoside, and Pep is an amino acid or a peptide or peptide derivate with 2 to 5 amino acids, and there is a bond between X and Pep either with a covalent bond or with a linker system.

Abstract: The invention relates to pharmaceutical compositions containing an isoflavone or isoflavone glycoside or a pharmaceutically acceptable salt or solvate of said isoflavone or isoflavone glycoside as an active substance. Also disclosed are uses of such pharmaceutical compositions.