| abstract |
PROBLEM TO BE SOLVED: To provide a polycyclic compound useful for treatment, prevention and / or management of various neurological disorders including, but not limited to, psychosis and schizophrenia, a synthesis method thereof, a pharmaceutical composition comprising the compound, And provision of its use. A compound represented by formula (IIa), or a pharmaceutically acceptable salt or stereoisomer thereof: (R1 to R7 are each independently H or alkyl, etc .; m is 0; n is 1). 【Selection chart】 None |