| abstract |
A compound represented by the formula (I) or a pharmaceutically acceptable salt thereof: n nwherein Z represents nitrogen atom or C—X; X represents hydrogen atom or fluorine atom; R 1 is hydrogen atom or a C 1 -C 3 alkyl group; L represents single bond or a C 1 -C 6 alkylene group which may be substituted; Y represents single bond, sulfur atom, oxygen atom, NH, or the like; R 2 represents hydrogen atom or a cyclic group which may be substituted, which is used for preventive and/or therapeutic treatment of a disease caused by abnormal activity of tau protein kinase 1 such as a neurodegenerative diseases (e.g. Alzheimer disease). |