The present invention provides compounds of formula I: or a pharmaceutically acceptable salt thereof. Compounds of formula I are inhibitors of Janus kinases and as such are useful for the treatment of various diseases and conditions mediated by said enzymes, such as rheumatoid arthritis, asthma, COPD, ALS, and the like.
本发明提供了如下的化合物I的公式:或其药用盐。化合物I的公式是Janus激酶的
抑制剂,因此对于治疗由该酶介导的各种疾病和病况(如类风湿性关节炎、哮喘、慢性阻塞性肺病、肌萎缩侧索硬化症等)非常有用。