The present invention is directed to PDE4B inhibitors of Formula I: (I) or a pharmaceutically acceptable salt thereof, wherein the substituents R1, R2, R 3, and R 4are as defined herein. The invention is also directed to pharmaceutical compositions comprising the compounds, methods of treatment using the compounds, and methods of preparing the compounds.
本发明涉及化合物的PDE4B
抑制剂,其
化学式为:(I)或其药用可接受的盐,其中取代基R1、R2、R 3和R 4如本文所定义。本发明还涉及包含这些化合物的药物组合物,使用这些化合物的治疗方法以及制备这些化合物的方法。