PIPERAZINE AMIDE DERIVATIVE, PREPARATION METHOD THEREFOR, AND USE THEREOF IN MEDICINE
申请人:ZHEJIANG HISUN PHARMACEUTICAL CO., LTD.
公开号:US20220177450A1
公开(公告)日:2022-06-09
The present invention relates to a piperazine amide derivative as represented by formula (I) or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition thereof, and use of same as a therapeutic agent, especially as a selective Rearranged During Transfection (RET) kinase inhibitor. Ring a, ring e, X
1
, X
2
, X
3
, X
4
, R
1
, R
2
, R
3
, R
4
, R
4′
, R
5
, R
5′
, R
6
, R
6′
, R
7
, R
7′
, R
8
, m and n have the same definitions as those in the specification.