3-methyl-1-(2-methylbenzoyl)piperazine

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

1-(4-chloro-3-nitrobenzoyl)-3-methylpiperazine

2,2-dimethyl-1-(3-methylpiperazin-1-yl)butan-1-one

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

1-cyclopropanecarbonyl-2-methylpiperazine

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

1-(4-tert-butylbenzoyl)-2-methylpiperazine

2-methyl-1-(pyridine-4-carbonyl)piperazine

ethyl (2Z)-2-chloro-2-[2-(2-chloro-4-nitrophenyl)hydrazin-1-ylidene]acetate

ethyl (2Z)-2-chloro-2-[2-(3-nitrophenyl)hydrazin-1-ylidene]acetate