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

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

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

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

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

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

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

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

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

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

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