| abstract |
The invention relates to compounds of the formula 1 n n nor a pharmaceutically acceptable salt, prodrug, solvate or hydrate thereof, wherein L, R 1 , R 2 R 3 and R 4 are as defined herein. The invention also relates to pharmaceutical compositions containing the compounds of formula 1 and to methods of treating abnormal cell growth, such as cancer in a mammal by administering the compounds of formula 1. |