[wherein n represents an integer of from 1 to 4, R
1
represents substituted or unsubstituted lower alkyl, —C(═Y)R
9
or the like, R
2
represents a hydrogen atom, substituted or unsubstituted lower alkyl or the like, R
3
represents substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl, a substituted or unsubstituted heterocyclic group or the like, and R
4
represents halogen or the like.]A phosphodiesterase 10A inhibitor which comprises a quinoline derivative represented by the above formula (I) or a pharmaceutically acceptable salt thereof as an active ingredient is provided.
提供一种
磷酸二酯酶10A
抑制剂,其包括上述式(I)所代表的
喹啉衍
生物或其药学上可接受的盐作为活性成分,其中n表示1至4的整数,R1表示取代或未取代的低碳基,-C(═Y)R9或类似物,R2表示氢原子,取代或未取代的低碳基或类似物,R3表示取代或未取代的低碳基,取代或未取代的芳基,取代或未取代的杂环基或类似物,R4表示卤素或类似物。