abstract |
The invention relates to substituted xanthines of general formula (I) wherein R1 to R3 have the designations cited in patent claims 1 to 16, and to the tautomers, stereoisomers, mixtures, prodrugs and salts thereof, which have precious pharmacological properties, especially an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV). |