N,N-dimethyl-4-(piperazine-1-carbonyl)aniline

1-(4-tert-butylbenzoyl)-3-methylpiperazine

1-(4-bromobenzoyl)-3-methylpiperazine

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

1-(2-chlorobenzoyl)-2-methylpiperazine

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

1-(3-fluorobenzoyl)-2-methylpiperazine

1-(3-bromobenzoyl)-2-methylpiperazine

1-(2-bromobenzoyl)-2-methylpiperazine

1-(4-chloro-2-fluorobenzoyl)-2-methylpiperazine

ethyl (2Z)-2-chloro-2-[2-(2-ethylphenyl)hydrazin-1-ylidene]acetate