A compound according to Formula I or II: (I) or (II) wherein R1, R1b, R2, L1, and L2 and L2b are as defined in the specification, pharmaceutical compositions thereof, and methods of use thereof.
根据公式I或II的化合物:(I)或(II),其中R1、R1b、R2、L1和
L2以及
L2b的定义如规范中所述,以及其药物组合物和使用方法。