2,2-dimethyl-1-(piperazin-1-yl)butan-1-one

1-(3-methylpiperazin-1-yl)octan-1-one

1-(3-methylpiperazin-1-yl)hexan-1-one

1-(3-fluorobenzoyl)-3-methylpiperazine

1-[3,5-bis(trifluoromethyl)benzoyl]-3-methylpiperazine

1-(3,4-difluorobenzoyl)-3-methylpiperazine

1-cyclohexanecarbonyl-2-methylpiperazine

2-methyl-1-(3,4,5-trimethoxybenzoyl)piperazine

1-(2-methylpiperazin-1-yl)-2-phenylbutan-1-one

2-methyl-1-(naphthalene-2-carbonyl)piperazine

3-methyl-1-(2-methylpiperazin-1-yl)butan-1-one