The invention provides compounds of formula [Chemical formula should be inserted here. Please see paper copy]in which R1, R2, R3 and R4 have the meanings defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy.
本发明提供公式[应在此处插入
化学式。请参见纸质副本]的化合物,其中R1、R2、R3和R4的含义如规范所定义;制备它们的过程;包含它们的药物组合物;制备药物组合物的过程;以及它们在治疗中的应用。