The invention relates to compounds represented by Formula (I): and to pharmaceutically acceptable salts or solvates of said compounds, wherein each of A, R<;SUP>;3-8<;/SUP>;, X<;SUP>;3<;/SUP>;, X<;SUP>;5<;/SUP>;, m, and n 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 (I).