A nitrogen-containing bicyclic heterocyclic compound represented by the following formula (1) is provided. When the compound or a salt thereof is administered to a human being or an animal, the compound has a strong antagonistic action against EP1 receptors, and is useful, for example, as an active ingredient of a medicine for the prevention and/or treatment of overactive bladder. The compound is also useful as an active ingredient of a medicine for the prevention and/or treatment of symptoms such as frequency urinary, urinary urgency, or urinary incontinence.
Discovery of a novel 2-(1 H -pyrazolo[3,4- b ]pyridin-1-yl)thiazole derivative as an EP 1 receptor antagonist and in vivo studies in a bone fracture model
administration. Despite its good potency in vitro, the high lipophilicity of 1 is a concern in long-term in vivo studies. Further medicinal chemistry efforts identified 4 as an improved lead compound with good in vitro ADME profile applicable to long term in vivo studies. A rat fracture study was conducted with 4 for 4 weeks to validate its utility in bone fracture healing. The results suggest that this