The purpose of the present invention is to provide: a therapeutic agent or a recurrence preventive agent for 5 serotonergic system- or dopaminergic system-related diseases, in particular, mental dysfunction symptoms and other non-motor .symptoms of Parkinson's disease； and a method for treating the aforesaid, symptoms or preventing the recurrence_ of the ,Same. A compound represented by 10 formula, (1) Awherein each symbol. is as defined in the description] or a pharmaceutically acceptable salt thereof can exhibit an effect of treating serotonergic system- or dopaminergic system-related diseases, in particular, mental dysfunction symptoms and other non-motor symptoms of 15 Parkinson's disease and/or an effect of preventing the recurrence of the same. A R 7 R (1)
