Provided herein are compounds of the Formula I and stereoisomers and pharmaceutically acceptable salts or solvates thereof, in which A, B, X1, X2, X3, X4, Ring D, and E have the meanings given in the specification, which are inhibitors of RET kinase and are useful in the treatment and prevention of diseases which can be treated with a RET kinase inhibitor, including RET-associated diseases and disorders.
本文件提供了公式I的化合物以及立体异构体和药用可接受的盐或溶剂化物,其中A、B、X1、X2、X3、X4、环D和E具有说明书中给出的含义,它们是RET激酶的
抑制剂,可用于治疗和预防可通过RET激酶
抑制剂治疗的疾病,包括与RET相关疾病和失调。