PROBLEM TO BE SOLVED: To provide a platelet aggregation inhibitor capable of relieving or preventing various symptoms caused by aggregation of platelets, particularly available more conveniently, and capable of being mass-produced easily.SOLUTION: The platelet aggregation inhibitor includes a compound represented by formula (1) as an active ingredient. There are further provided blood flow improving agents and antithrombotic agents each containing the platelet aggregation inhibitor as an active ingredient.COPYRIGHT: (C)2013,JPO&INPIT【課題】血小板凝集による様々な症状を軽減し、もしくは予防することができ、かつ、特により簡便に入手できると共に、大量生産が容易に実現可能な血小板凝集抑制剤の提供。【解決手段】下記式(1)で示される化合物を有効成分として含有する血小板凝集抑制剤。さらに、この血小板凝集抑制剤を有効成分とする、血流改善剤および抗血栓剤をも提供する。【選択図】なし
