The invention provides compounds of Formula (I), stereoisomers or pharmaceutically acceptable salts thereof, wherein A, X, R1, R2, R4 and R5 are defined herein, a pharmaceutical composition that includes a compound of Formula (I) and a pharmaceutically acceptable carrier, adjuvant or vehicle, and methods of using the compound or composition in therapy, as TYK2 Kinase inhibitors.
该发明提供了化合物的公式(I),其立体异构体或其药学上可接受的盐,其中A、X、R1、R2、R4和R5在此处定义,包括化合物的药物组合物的制剂和药学上可接受的载体、辅料或载体,以及使用该化合物或组合物作为TYK2激酶
抑制剂进行治疗的方法。