Provided are a compound represented by general formula (I), or the pharmaceutically acceptable salt thereof,
(wherein R
a
represents a hydrogen atom or the like, R
1
and R
2
may be the same or different, and each represents a hydrogen atom, optionally substituted lower alkyl or cycloalkyl, or R
1
and R
2
are combined together with the adjacent nitrogen atom thereto to form nitrogen-containing heterocyclic group, and Z represents a bicyclic heterocyclic group in which optionally substituted two six-membered rings are fused to each other, or the like) and the like.
提供一种由通式(I)表示的化合物,或其药学上可接受的盐(其中Rarepresents表示
氢原子或类似物,R1和R2可以相同也可以不同,每个表示
氢原子,可选地取代的低
碳基或
环烷基,或者R1和R2与毗邻的
氮原子结合形成含
氮杂环基,Z表示一个双环杂环基,在其中可选地取代的两个六元环相互融合,或类似物)。