| abstract |
The invention relates to compounds represented by the general formula (I) and the like. In the formula, Ar 1 denotes an aryl or heteroaryl group which may have a substituent; R 1 denotes a hydrogen atom, or denotes a C1-C6 alkyl, aryl, aralkyl or heteroaryl group which may have a substituent; R 2 denotes an aralkyl group or a group represented by the formula (a); and R 3 denotes a hydrogen atom or a C1-C6 alkyl group. The compounds of the invention have an excellent Weel kinase inhibitory effect, and therefore are useful in the field of medicine, especially in the field of treatment of various cancers. |