申请人:Smith Kline & French Laboratories Limited
公开号:US04904664A1
公开(公告)日:1990-02-27
The invention relates to pyridazinone derivatives which have inotropic, vasodilator and bronchodilator activity. The compounds of the invention are described by formula (I): ##STR1## wherein: R.sup.1 is hydrogen or methyl; R.sup.2 is hydrogen or methyl; and represent double or single bonds; and the benzene ring is para- or meta-substituted; and pharmaceutically acceptable salts thereof.
该发明涉及具有肌力作用、血管扩张作用和支气管扩张作用的吡啶并咪唑酮衍生物。该发明的化合物由以下式(I)描述:
其中:R.sup.1 为氢或甲基;R.sup.2 为氢或甲基;并表示双键或单键;苯环为对位或间位取代;及其药用可接受的盐。