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

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

1-(4-bromobenzoyl)-3-methylpiperazine

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

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

1-(3,4-dichlorobenzoyl)-2-methylpiperazine

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

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

ethyl (2Z)-2-chloro-2-{2-[4-(propan-2-yl)phenyl]hydrazin-1-ylidene}acetate

ethyl (2Z)-2-chloro-2-[2-(4-chloro-3-nitrophenyl)hydrazin-1-ylidene]acetate

1-(3-nitrophenyl)-5-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid