Compounds having pde9a inhibitory activity, and pharmaceutical uses thereof

A compound represented by the following Chemical formula 1 or a pharmaceutically acceptable salt thereof.

• In Chemical Formula 1,
• A1 is NH or N—C1-2alkyl,
• A2 is H, linear or branched C1-5alkyl, or phenyl,
• X is a substituent selected from the group consisting of —H, halogen, —NO2, —CN, —SR1, linear or branched C1-10alkyl unsubstituted or substituted with one or more halogens, linear or branched C1-10alkoxy unsubstituted or substituted with one or more halogens, C6-10aryl unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl, and C6-10aryloxy unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl,
• Y is a substituent selected from the group consisting of C1-10 linear or branched alkyl unsubstituted or substituted with one or more halogens, C3-10cycloalkyl unsubstituted or substituted with one or more halogens, 6-10 membered heterocycloalkyl comprising O or S heteroatom unsubstituted or substituted with one or more halogens, C1-10 linear or branched alkoxy unsubstituted or substituted with one or more halogens, C6-10aryl unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl, and C6-10aryloxy unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl,
• R1 is a substituent selected from the group consisting of C1-10 linear or branched alkyl unsubstituted or substituted with one or more halogens, C1-10 linear or branched alkoxy unsubstituted or substituted with one or more halogens, C6-10aryl unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl, C1-2alkyl-C6-10aryl unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl, and C6-10aryloxy unsubstituted or substituted with one or more halogen or C1-10 linear or branched alkyl.