Compounds of formula (I) or a pharmaceutically acceptable derivative thereof:
wherein X, Y, Z, R2a, R2b, R3a, R3b, R8, R9, and Rx 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.
化合物的公式(I)或其药学上可接受的衍
生物:其中X、Y、Z、R2a、R2b、R3a、R3b、R8、R9和Rx的定义如规范所述,制备这种化合物的过程,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。