Racemic or enantiomeric pyridazinone-substituted ethynylphenyl derivative represented by general formula (I), pharmacologically acceptable salt thereof, and remedy for circulatory organ diseases, thrombosis and renal disease. In the said formula, R¹ represents hydrogen, C₁ to C₆ alkyl, C₁ to C₄ alkoxycarbonyl, substituted amino C₁ to C₆ alkyl, hydroxy C₁ to C₆ alkyl, or phenyl substituted with alkyl, alkoxy, nitro or halogen; R² represents hydrogen, C₁ to C₄ alkoxy or halogen; R³ represents C₁ to C₄ alkoxy, C₁ to C₆ alkylamino or C₁ to C₄ alkoxy C₁ to C₄ alkoxy; R⁴ represents C₁ to C₄ alkyl or amino; R⁵ represents hydrogen or C₁ to C₄ alkyl; R⁶ represents hydrogen or C₁ to C₄ alkyl; and R⁷ represents hydrogen or C₁ to C₄ alkyl.
由通式(I)代表的
吡嗪酮-取代的
乙炔基苯基衍
生物的外消旋体或对映体、其药理学上可接受的盐,以及循环器官疾病、血栓形成和肾脏疾病的治疗药物。在上述通式中,R¹代表氢、C₁~C₆烷基、C₁~C₄烷氧基羰基、取代
氨基 C₁~C₆烷基、羟基 C₁~C₆烷基或被烷基、烷氧基、硝基或卤素取代的苯基;R²代表氢、C₁~C₄烷氧基或卤素;R³ 代表 C₁ 至 C₄ 烷氧基、C₁ 至 C₆ 烷
氨基或 C₁ 至 C₄ 烷氧基;R⁴ 代表 C₁ 至 C₄ 烷基或
氨基;R⁵ 代表氢或 C₁ 至 C₄ 烷基; R⁶ 代表氢或 C₁ 至 C₄ 烷基;以及 R⁷ 代表氢或 C₁ 至 C₄ 烷基。