| 摘要 |
A medicament for therapeutic and/or prophylactic treatment of neuropathic pain, which comprises a compound represented by the general formula (I) or a pharmaceutically acceptable salt thereof as an active ingredient: wherein R<1 >represents a hydrogen atom or a hydroxyl group; R<2 >represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; R<3 >represents a phenyl group which may have 1 to 3 atoms or substituents selected from the group consisting of a halogen atom, a hydroxyl group, an alkyl group having 1 to 3 carbon atoms, and an alkoxyl group having 1 to 3 carbon atoms, or represents -NH-R<4 >wherein R<4 >represents a phenyl group which may have 1 to 3 atoms or substituents selected from the group consisting of a halogen atom, a hydroxyl group, an alkyl group having 1 to 3 carbon atoms, and an alkoxyl group having 1 to 3 carbon atoms or hydrogen atom, and n represents 0 or 1.
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