8-[3-amino-piperidin-1-yl]-xanthines, the preparation...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C544S118000, C544S268000, C544S269000, C544S270000, C544S271000, C544S272000, C544S235000, C544S237000, C514S248000, C514S263200, C514S263210, C514S263220, C514S263230, C514S263350, C514S263340, C514S263360

Reexamination Certificate

active

07407955

ABSTRACT:
The present invention relates to substituted xanthines of general formulawherein R1to R3are defined as in claims1to16, the tautomers, the stereoisomers, the mixtures, the prodrugs thereof and the salts thereof which have valuable pharmacological properties, particularly an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).

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