Compounds of the formula I, in which R
1
, R
2
, R
3
, R
3
, R
4
have the meanings indicated in Claim
1,
are inhibitors of tyrosine kinases, in particular Met kinase, and can be employed, inter alia, for the treatment of tumours.
公式I的化合物,其中R1,R2,R3,R3,R4具有权利要求1所示的含义,是
酪氨酸激酶的
抑制剂,特别是Met激酶,并可用于治疗肿瘤等疾病。