Patent ID: 8912180

Claim:
A compound of the formula (I) or a salt thereof: wherein A 2 and A 3 are N and A 1 is CH, or A 1 and A 3 are N and A 2 is CH, B's are CH and n is 0, R 1 is -L 1 -L 2 -Y, wherein -L 1 -L 2 -is —NH— or —O—, R2 is halogen, —OH, —O-lower alkyl, —CN, or lower alkyl which may be substituted with one or more substituents selected from the group consisting of halogen, —OH, —O— lower alkyl, and —CN, Y is a non-aromatic heterocycle which may be substituted with one or more substituents selected from the Group D1, and the Group D1 consists of: -L 5a -non-aromatic heterocycle which may be substituted with one or more substituents selected from the group consisting of lower alkyl, —C(O)O-lower alkyl, —C(O)-lower alkyl, and oxo, wherein L 5a represents a bond or —C(O)—.