A compound represented by the formula [I]: or a pharmacologically acceptable salt or ester thereof, wherein Ring A represents a five-membered aromatic heterocyclic group or the like fused with a non-aromatic ring group, which may be substituted, Ring B represents a phenyl group or the like which may be substituted, X1 represents a single bond or the like, R1 and R2 each represent a C1-6 alkyl group or the like, m represents an integer of 0 to 3, and n represents an integer of 0 to 2, is effective as a therapeutic agent for a disease caused by Aβ.
化合物的
化学式为[I],或其药学上可接受的盐或
酯,其中环A代表一个五元芳香杂环基团或与非芳香环基团融合的类似物,可以被取代,环B代表一个
苯基或类似物,可以被取代,X1代表一个单键或类似物,R1和R2各代表一个C1-6烷基或类似物,m表示0到3的整数,n表示0到2的整数,对于由Aβ引起的疾病具有治疗作用。