3,3-dimethyl-1-(3-methylpiperazin-1-yl)butan-1-one

3,5,5-trimethyl-1-(3-methylpiperazin-1-yl)hexan-1-one

1-(3-methoxybenzoyl)-3-methylpiperazine

1-benzoyl-2-methylpiperazine

1-(3,5-dinitrobenzoyl)-2-methylpiperazine

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

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

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

2-(4-chlorophenyl)-1-(2-methylpiperazin-1-yl)ethan-1-one

1-(3-chlorobenzoyl)-2-methylpiperazine