Compounds of the formula (I), in which R1, R2 and R3 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.
Compounds of the formula (I), in which R
1
, R
2
and R
3
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.