Compounds of the formula (I), in which R, X, Y, Z, R
3
and R
4
have the meanings indicated in claim
1
, are inhibitors of methionine aminopeptidase and can be employed for the treatment of tumours.
公式(I)的化合物,其中R,X,Y,Z,R3和R4具有权利要求1中所示的含义,是甲
硫氨酸
氨肽酶的
抑制剂,并可用于治疗肿瘤。