Substituted hexahydropyrazino[1,2-a]pyrimidine-4,7-dione derivatives, processes for their preparation and their use as medicamentsThe invention relates to substituted hexahydropyrazino[1,2-a]pyrimidine-4,7-dione derivatives and to the physiologically tolerated salts and physiologically functional derivatives thereof.Compounds of the formula I in which the radicals have the stated meanings, and the physiologically tolerated salts thereof and processes for preparing them are described. The compounds are suitable for example as anorectic agents.