A pyrazolone derivative represented by formula (I) below:
wherein R1 to R3 are the same as defined in claims; or an optical isomer, a pharmaceutically acceptable salt thereof, or a hydrate or solvate thereof is provided. The novel pyrazolone derivative according to the present invention has a PAI-1 production inhibitory activity, a tissue fibrosis inhibitory activity, and a fibrolytic activity, and is effective for preventing and/or treating tissue fibrotic diseases (lung fibrosis, kidney fibrosis, etc.) and diseases of which a pathological thrombus becomes the cause, such as ischemic cardiac diseases (cardiac infarction and angina pectoris), atrial thrombus, lung embolism, deep thrombophlebitis, disseminated intravascular clotting, ischemic brain diseases (brain infarction, brain hemorrhage), and arterial sclerosis. In addition, a pharmaceutical agent for preventing and/or treating the disease conditions or the symptoms mediated by plasminogen activator inhibitor-1, comprising the novel pyrazolone derivative according to the present invention is also provided.
下式(I)所代表的
吡唑酮衍
生物:
其中 R1 至 R3 与权利要求中定义的相同;或其光学异构体、药学上可接受的盐或其
水合物或溶液。根据本发明的新型
吡唑酮衍
生物具有 PAI-1 生成抑制活性、组织纤维化抑制活性和纤维分解活性,可有效预防和/或治疗组织纤维化疾病(肺纤维化、肾纤维化等)和病理血栓形成疾病。例如缺血性心脏病(心肌梗塞和心绞痛)、心房血栓、肺栓塞、深部血栓性静脉炎、弥散性血管内凝血、缺血性脑部疾病(脑梗塞、脑出血)和动脉硬化。此外,还提供了一种用于预防和/或治疗由纤溶酶原激活剂
抑制剂-1介导的疾病症状的药剂,其中包含根据本发明的新型
吡唑酮衍
生物。