There are provided compounds of the formula
wherein X, Y, Z, R1, R2 and R3 are as described herein
and enantiomers and pharmaceutically acceptable salts and esters thereof. The compounds are useful as anticancer agents.
There are provided compounds of the formula
wherein X, Y, Z, R
1
, R
2
and R
3
are as described herein
and enantiomers and pharmaceutically acceptable salts and esters thereof. The compounds are useful as anticancer agents.