The present invention provides compounds of formula I,
wherein the variables R
1
, R
2
, R
5
and b are as defined in the specification. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed.
本发明提供了I式化合物,其中变量R1、R2、R5和b的定义如规范中所述。本发明还揭示了相应的药物组合物、治疗方法、合成方法和
中间体。