abstract |
[PROBLEMS] To provide a novel pyrazolopyridine carboxamide derivative which is useful as a pharmaceutical agent having an inhibitory activity on phosphodiesterase. [MEANS FOR SOLVING PROBLEMS] A pyridazinone derivative represented by the general formula (1) (e.g., 2-ethyl-7-methoxypyrazolo[1,5-a]pyridine-4-carboxylic acid (3,5-dichloropyridin-4-yl)amide). |