[EN] PYRAZOLOPYRAZINES AND THEIR USE AS ADENOSINE ANTAGONISTS<br/>[FR] PYRAZOLOPYRAZINES ET LEUR UTILISATION COMME ANTAGONISTES VIS-A-VIS DE L'ADENOSINE
申请人:FUJISAWA PHARMACEUTICAL CO
公开号:WO2001040230A1
公开(公告)日:2001-06-07
A pyrazolopyrazine compound of formula (I): wherein R1 is aryl which may have one or more suitable substituent(s); and R2 is hydrogen; lower alkyl; lower alkenyl; cyclo(lower)alkyl; heteromonocyclic group; lower alkyl substituted with one or more substituent(s) selected from the group consisting of cyclo(lower)alkyl, halogen, cyano, aryl and heteromonocyclic group, or a salt thereof. The pyrazolopyrazine compound (I) and salt thereof of the present invention are adenosine antagonists and are useful for the prevention and/or treatment of depression, dementia (e.g. Alhzheimer's disease, cerebrovascular dementia, dementia accompanying Parkinson's disease, etc.), Parkinson's disease, anxiety, pain, cerebrovascular disease (e.g. stroke, etc.), heart failure and the like.