| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound useful for treatment of central diseases such as schizophrenia and Alzheimer's disease.SOLUTION: This invention provides a compound represented by formula (I) or its pharmacologically acceptable salt. In the formula (I), Rrepresents a Calkyl group, X represents an oxygen atom, NH or the like, m and n represent each independently 1, 2 or 3, Rrepresents a Calkyl group, a Ccycloalkyl group or the like, R, Rand Rrepresent each independently a hydrogen atom, a halogen atom or the like, and Rrepresents a hydrogen atom, a Calkyl group or the like. |
