| abstract |
[PROBLEMS] To prevent chronic progression of Parkinson's disease or to prevent the progression of neurological dysfunction by protecting dopamine neurons from its pathogenesis, prolonging the period until taking L-dopa and improving the function. It is an issue to provide. The present invention relates to a general formula (1). [Wherein R 1 represents hydrogen or the like. R 2 represents hydrogen or the like. R 3 represents a phenyl group which may have a substituent. R 4 represents halogen. R 5 represents hydrogen or halogen. R 6 represents hydrogen. R 7 represents a hydroxy group or the like. ] The pharmaceutical which consists of quinolone compound represented by these, or its salt is provided. [Selection figure] None |