The present invention relates to substituted xanthines of general formula
wherein R
1
to R
4
are defined as in claim
1,
the tautomers and the stereoisomers thereof, mixtures thereof, the prodrugs and the salts thereof which have valuable pharmacological properties, particularly an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).
本发明涉及一般式为的取代
黄嘌呤,其中R1至R4如权利要求1所定义的互变异构体和立体异构体,其混合物,以及具有有价值的药理学特性的前药和盐,特别是对酶二肽基肽酶-IV(
DPP-IV)的抑制作用。