| 摘要 |
PCT No. PCT/JP97/02493 Sec. 371 Date Jan. 19, 1999 Sec. 102(e) Date Jan. 19, 1999 PCT Filed Jul. 17, 1997 PCT Pub. No. WO98/03507 PCT Pub. Date Jan. 29, 1998A pyrazolopyridine compound of formula (I) wherein R1 is aryl, and R2 is lower alkyl substituted with unsaturated 3 to 8-membered heteromonocyclic group containing 1 or 2 sulfur atom(s) and 1 to 3 nitrogen atom(s) which may have one or more substituent(s); a group of formula (1) wherein R3 is hydrogen, lower alkyl, ar(lower)alkyl or acyl, R4 is hydrogen or hydroxy, A is lower alkylene, m is an integer of 0 or 1, and n is an integer of 1 or 2; a group of formula (2) wherein R5 and R6 are each lower alkyl; or quinuclidinyl, or a salt the The pyrazolopyridine compound (I) and a salt thereof of the present invention are adenosine antagonists and are useful for the prevention and/or treatment of depression, dementia (e.g. Alzheimer's disease, cerebrovascular dementia, Parkinson's disease, etc.), anxiety, pain, cerebrovascular disease (e.g. stroke, etc.), heart failure, and the like.
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