Compounds of formula (I) or a pharmaceutically acceptable derivative thereof: (I) wherein A, R1 , R2 , Rx , R8 , R9 and n 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)或其药学上可接受的衍
生物的化合物:其中A、R1、R2、Rx、R8、R9和n如规范中所定义,一种制备这种化合物的方法,包括这种化合物的药物组合物以及这种化合物在医学上的用途。