| 摘要 |
The present invention provides an Aurora inhibitor which comprises, as an active ingredient, an indazole derivative represented by Formula (I) (wherein R 1 represents substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group) or a pharmaceutically acceptable salt thereof, an Aurora inhibitor which comprises, as an active ingredient, an indazole derivative represented by Formula (Ia) [wherein R 2 represents CONR 4a R 4b (wherein R 4a and R 4b may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like, or R 4a and R 4b are combined together with the adjacent nitrogen atom thereto to form a substituted or unsubstituted heterocyclic group) or the like, and R 3 represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like] or a pharmaceutically acceptable salt thereof, and the like.
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