3-methyl-1-(4-nitrobenzoyl)piperazine

2-methyl-1-[4-(trifluoromethyl)benzoyl]piperazine

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

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

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

1-(2-ethylphenyl)-5-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid

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

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

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

1-(3-chloro-4-methylphenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid

3-(ethoxycarbonyl)-1-(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid