A compound represented by the following formula (I) or a salt thereof:
wherein R represents a hydrogen atom, a hydroxy group, or a halogen atom
Ar
1
represents a bicyclic heterocyclic group represented by the following formula:
and
Ar
2
represents a bicyclic heterocyclic group represented by the following formulae:
以下式子(I)所表示的化合物或其盐:
其中,R代表
氢原子、羟基或卤素原子;
Ar1代表由以下式子表示的双环杂环基团:
Ar2代表由以下式子表示的双环杂环基团: