A compound of formula (I) or a pharmaceutically acceptable derivative thereof,
wherein, R
1
, R
2
, R
3
, R
4
, R
5
, m, n and X are as defined in the specification; a process for preparing such compounds; a pharmaceutical composition comprising such compounds; and the use of such compounds in medicine.
一种式子为(I)的化合物或其药学上可接受的衍
生物,其中,R1,R2,R3,R4,R5,m,n和X如规范中所定义;一种制备这种化合物的方法;包含这种化合物的药物组合物;以及这种化合物在医学中的应用。