Patent ID: 8883788

Claim:
A compound represented by the formula (I): wherein a partial structural formula: ring A is a nitrogen-containing fused heterocyclic group optionally substituted with 1 to 5 C 1-6 alkyl groups, wherein nitrogen(s) is/are the only heteroatom(s) in the heterocyclic group, L 1a is —X 2 —Y 2 —(X 2 is a bond or —O—; Y 2 is an optionally substituted C 1-6 alkylene group), R 1 is (1) a C 1-6 alkyl group optionally substituted with 1 to 3 halogen atoms or one C 3-7 cycloalkyl group, (2) a C 3-7 cycloalkyl group, or (3) a C 6-14 aryl group optionally substituted with a C 1-6 alkyl group substituted with 1 to 3 halogen atoms, R 2 is a hydrogen atom, or a pyrazolyl group optionally substituted with a substituent selected from the group consisting of a C 1-6 alkyl group and a C 6-14 aryl group, and —R y is a hydrogen atom, or a salt thereof.