3-fluoro-4-[4-[2-(2-methylpropoxy)-5-methylsulfonylbenzoyl]piperazin-1-yl]benzonitrile
3-fluoro-4-[4-(2-isobutoxy-5-methylsulfonyl-benzoyl)piperazin-1-yl]benzonitrile
3-fluoro-4-[4-[(2-isobutoxy-5-methylsulfonylphenyl)-oxomethyl]-1-piperazinyl]benzonitrile
3-fluoro-4-[4-(2-isobutoxy-5-mesyl-benzoyl)piperazin-1-yl]benzonitrile
3-fluoro-4-[4-[2-(2-methylpropoxy)-5-methylsulfonyl-phenyl]carbonylpiperazin-1-yl]benzonitrile