A compound according to Formula I or II:
wherein R
1
, R
1b
, R
2
, L
1
, and L
2
and L
2b
are as defined in the specification, pharmaceutical compositions thereof, and methods of use thereof.
一种符合公式I或II的化合物:其中R1,R1b,R2,L1和
L2以及
L2b的定义如规范所述,以及其制药组成物和使用方法。