The present invention provides heterocyclic derivatives which activate the IP receptor. Activating the IP receptor signaling pathway is useful to treat many forms of PAH, pulmonary fibrosis and exert beneficial effects in fibrotic conditions of various organs in animal models and in patients. Pharmaceutical compositions comprising such derivatives are also encompassed. Examples of compounds of the invention include the compounds according to Formula Ia, or a pharmaceutically acceptable salt thereof, and the compounds of the examples.
本发明提供了激活IP受体的杂环衍
生物。激活IP受体信号通路对于治疗许多形式的PAH、肺纤维化并在动物模型和患者中对各种器官的纤维化状况产生有益效果是有用的。还包括含有这类衍
生物的制药组合物。本发明的化合物示例包括根据式Ia的化合物或其药学上可接受的盐以及示例化合物。