content of the ground seed during autolysis. Thus, about 85Olo and 90°10 of the glucosinolates are removed by extraction with hexane, if the autolysis is carried out for 4 hrs at 45O C using 25 O/o and 40 O/o water, respec-A c k n o w l e d g m e n t Financial support by the "Alexander von Humboldt-Stiftung" and "Deutscher Akademischer Austausdrdienst" (DAAD) is gratefully appreciated. Thanks are due to Mrs. Zrmgard Kiewitt for valuable assistance.