A compound, pharmaceutically acceptable salt thereof, or hydrate thereof having a PGD.sub.2 -antagonistic activity, and an inhibitory activity against infiltration of eosinophils, useful for treating mast cell dysfunction-associated diseases, such as systemic mastocytosis and disorder of systemic mast cell activation, as well as tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, ischemic reperfusion injury, inflammation and atopic dermatitis, which is shown by the formula (I): ##STR1## is provided.
一种具有
PGD.sub.2 -拮抗活性和对嗜酸性粒细胞浸润的抑制活性的化合物,药用可接受的盐或
水合物,用于治疗与肥大细胞功能障碍相关的疾病,如全身性肥大细胞病和全身性肥大细胞激活障碍,以及气管收缩、哮喘、过敏性鼻炎、过敏性结膜炎、荨麻疹、缺血再灌注损伤、炎症和特应性皮炎,其
化学式为(I):提供。