The invention relates to compounds of the formula 1
or a pharmaceutically acceptable salt, prodrug or hydrates thereof, wherein X, 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 hyperproliferative disorders in a mammal by administering the compounds of formula 1.
                            本发明涉及公式1的化合物或其药学上可接受的盐、前药或
水合物,其中X、L、R1、R2、R3和R4如本文所定义。本发明还涉及含有公式1化合物的药物组合物,以及通过给哺乳动物注射公式1化合物来治疗增殖过度性疾病的方法。