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

3-(ethoxycarbonyl)-1-(2-methylphenyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid

1-(5-chloro-2-methylphenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid

3-(ethoxycarbonyl)-1-[3-(trifluoromethyl)phenyl]-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-nitrophenyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid

1-(2,3-dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1H-pyrazole-5-carboxylic acid

1-(2-chlorophenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1H-pyrazole-5-carboxylic acid

1-(2,5-dichlorophenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1H-pyrazole-5-carboxylic acid

3-(ethoxycarbonyl)-5-methyl-1-(2-methyl-5-nitrophenyl)-4,5-dihydro-1H-pyrazole-5-carboxylic acid

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