PROBLEM TO BE SOLVED: To provide a pharmaceutical composition for spinocerebellar ataxia or atrophy, degeneration including neurodegeneration diseases in which the main locus of pathological change exists in nucleus or neural pathway from a cerebellum or the brain stem to a spinal cord, or multiple system atrophy, or to provide an improving agent for improving ataxia or equilibrium disturbance.SOLUTION: The invention provides a compound including all possible isomers and racemates represented in formula: wherein R is methyl, and a pharmaceutically acceptable salt, or a solvate thereof.COPYRIGHT: (C)2013,JPO&INPIT【課題】小脳や脳幹から脊髄にかけて神経核や伝導路に病変の主座をもつ神経変性疾患を包含する脊髄小脳変性症(spinocerebellar ataxia or atrophy, degeneration)もしくは多系統萎縮症治療剤、または運動失調もしくは平衡障害改善剤の提供。【解決手段】(式中、Rはメチルである)で示される全ての可能な異性体やラセミ体を含む化合物、その製薬上許容される塩、またはその溶媒和物。【選択図】なし
