Compounds of the formula I in which X, R
1
, R
2
, R
3
, R
4
and R
6
have the meanings indicated in Claim
1
, are inhibitors of cell proliferation/cell vitality and can be employed for the treatment of tumours.
公式I中X、R1、R2、R3、R4和R6具有权利要求书中指示的含义,是细胞增殖/细胞活力的
抑制剂,可用于肿瘤的治疗。