| abstract |
A compound having GPR52 agonist activity or a salt thereof is provided. The compound can be provided as a preventive / therapeutic agent for schizophrenia or the like. The compound is represented by the following formula (Ia): wherein A represents -CONR 2 - or -NR 2 CO-, R 2 represents a hydrogen atom or the like, B represents a hydrogen atom or the like, a ring CyI represents a six-membered aromatic ring which may have one or more substituents in addition to a group represented by -A-B, a ring Cy2 represents a six-membered ring which may be substituted with a halogen atom or the like, a ring Cy3 represents a five- or six-membered ring which may have one or more substituents; X represents C 1-2 alkylene or the like, m represents an integer of 0 to 2, and a ring Cy4 represents a six-membered aromatic ring which may have one or more substituents. |