abstract |
PROBLEM TO BE SOLVED: To provide a novel pyrazolopyridine derivative useful as a pharmaceutical having phosphodiesterase (PDE) inhibitory action. The following general formula (1) [Chemical 1] A novel pyrazolopyridine derivative represented by the formula (specific example: 6- (2-ethyl-7-methoxy-pyrazolo [1,5-a] pyridin-5-yl) -5-methyl-4,5-dihydro-3 (2H) -pyridazinone) was found. [Selection figure] None |