Compounds of formula (I) or a pharmaceutically acceptable derivative thereof:
wherein R
1
, R
2a
, R
2b
, R
2c
, and R
3
are as defined in the specification, a process for the preparation of such compounds, pharmaceutical compositions comprising such compounds and the use of such compounds in medicine.
式(I)的化合物或其药学上可接受的衍
生物,其中R1、R2a、R2b、R2c和R3如规范中所定义,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药中的用途。