| 摘要 |
An imidazolidinedione derivative represented by general formula (I) or a pharmaceutically acceptable salt thereof, each having an anti-PCP(phencyclidine) effect and being useful as a psychotropic drug, etc. In said formula, n represents an integer of 2 to 9; A represents lower alkylene; ring B represents thiophene or benzene; R<1> and R<2> represent each independently hydrogen, or (un)substituted lower alkyl or aralkyl; R<3> represents hydrogen or hydroxy; R<4> represents hydrogen, lower alkyl, hydroxy, lower alkoxy or lower alkoxy-lower alkoxy; and symbol <u>-----</u> represents a single or double bond. |
