Disclosed are substituted xanthines of general formula
1
wherein R
1
to R
4
are defined hereinbelow, the tautomers, the stereoisomers, the mixtures thereof, the prodrugs thereof and the salts thereof, which have valuable pharmacological properties, particularly an inhibitory effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).
本发明涉及一般式1的取代
黄嘌呤,其中R1至R4的定义如下,其互变异构体、立体异构体、混合物、前药及其盐具有有价值的药理学特性,特别是对二肽基肽酶-IV(
DPP-IV)酶活性具有抑制作用。