abstract |
The present invention relates to substituted xanthines of the general formula in which R 1 to R 3 are as defined in claims 1 to 16, their tautomers, their stereoisomers, their mixtures, their prodrugs and their salts, which have valuable pharmacological properties, in particular an activity to inhibit the activity of the enzyme dipeptidyl peptidase-IV ( DPP-IV). |