| abstract |
A compound represented by formula (I), a prodrug thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof:n n n n n n n n [Wherein, R 1 is a hydrogen atom, a halogen atom or the like; R 2 , R 3 , and R 4 are each independently a hydrogen atom, a halogen atom, C 1 -C 15 alkyl (optionally substituted with one or more C 1 -C 12 alkyloxy, etc.), and the like; R 5 is a hydrogen atom or the like; R 6 and R 7 are halogen atoms and the like; R 8 is C1-C3 alkyl or the like; R 9 is a hydrogen atom or the like]. |