| abstract |
The invention relates to compounds represented by Formula (I) and to prodrugs thereof, pharmaceutically acceptable salts or solvates of said compounds or said prodrugs, wherein each of R1a-d , R2a-b , R3, and X1 are defined herein, The invention also relates to pharmaceutical compositions containing the compounds of Formula (I) and to methods of treating hyperproliferative disorders in a mammal by administering compounds of Formula(l). |