abstract |
A compound of Formula (2) ** Formula ** or a pharmaceutically acceptable salt thereof, wherein R1 represents SO2CH3; R2 represents CH3, F or Cl; R3 represents n-propyl or ethyl; X represents C; Y represents O; and Z represents H; or 4- (3-methanesulfonyl-phenyl) -1-propyl-piperidine-1-oxide or a pharmaceutically acceptable salt thereof. |