The present invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof; (I) wherein R1 R2, R4 and X1 are defeined herein, a method for manufacturing the compounds of the invention, and its therapeutic uses. The present invention further provides a combination of pharmacologically active agents and a pharmaceutical composition.
本发明提供了化合物(I)或其药用可接受盐;(I)中R1、R2、R4和X1的定义见本文,本发明化合物的制备方法以及其治疗用途。本发明还提供了药理
活性剂的组合和药物组合物。