A compound having Formula I or II (Formula I) or (Formula II), or a pharmaceutically acceptable salt thereof, wherein X, Z, R
1
, R
2
, R
11
and R
12
are as defined in the specification; pharmaceutical compositions thereof; and methods of use thereof.
A compound having Formula I or II (Formula I) or (Formula II), or a pharmaceutically acceptable salt thereof, wherein X, Z, R1, R2, R11 and R12 are as defined in the specification; pharmaceutical compositions thereof; and methods of use thereof.