Novel polycyclic compounds of the formula [I],
1
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, ring A, ring B, X, Y and Z are as defined herein and the pharmaceutically acceptable salts thereof. These compounds have antitumor activity and useful for the treatment of cancer.
式(I)的新型
多环化合物,其中R1、R2、R3、R4、R5、R6、R7、环A、环B、X、Y和Z的定义如本文所述,并且其药学上可接受的盐。这些化合物具有抗肿瘤活性,可用于治疗癌症。