申请人:KYORIN PHARMACEUTICAL CO., LTD.
公开号:EP0989129A1
公开(公告)日:2000-03-29
Novel pyrazolopyridylpyridazinone derivatives characterized by being represented by general formula (1)
and pharmacologically acceptable salts thereof, which exhibit a phosphodiesterase inhibiting activity and have a selective potent bronchodilating effect on the respiratory tract: a process for the preparation of them: and bronchodilators containing the same as the activity ingredient: wherein R1 is C1-C4 lower alkyl or C3-C6 cycloalkyl: and R2, R3, R4 and R5 are each independently hydrogen, C1-C4 lower alkyl or phenyl, or alternatively R3 and R5 may be united to form a double bond.
新型吡唑并哒嗪酮衍生物,其特征在于由通式(1)表示
及其药理学上可接受的盐,它们具有磷酸二酯酶抑制活性,并对呼吸道具有选择性强效支气管扩张作用:它们的制备方法:以及含有相同活性成分的支气管扩张剂:其中 R1 是 C1-C4 低级烷基或 C3-C6 环烷基:R2、R3、R4 和 R5 各自独立地是氢、C1-C4 低级烷基或苯基,或者 R3 和 R5 可以结合形成双键。