1,2,4-triasolo[4,3-b]pürido[3,2-d]püridasiini derivaadid, nende valmistamismeetod ja farmatseutiline kompositsioon ning nende kasutamine

摘要

Heterocyclic compounds of formula (I), wherein R1 represents a hydrogen atom or a -(CH2)M-Y group, wherein m is an integer from 0 to 4 and Y represents an alkyl, haloalkyl, alkoxy, alkoxycarbonyl, C3-C7 cycloalkyl, norbornyl or phenylalkenyl group, or an aromatic group which aromatic group^may optionally be substituted by one or more halogen atoms; R2 represents an aromatic group which aromatic group may optionally be substituted by one or more halogen atoms or alkyl, alkoxy, C3-C6 cycloalkoxy, methylenedioxy, nitro, dialkylamino or trifluoromethyl groups, and R3 represents a hydrogen or halogen atom or an alkyl group, and pharmaceutically acceptable salts thereof, processes for preparing the same. The compounds are phosphodiesterase 4 inhibitors.