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

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

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

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

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

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

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

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

4-(3-nitrobenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid

4-(4-bromobenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid

4-(4-methyl-3-nitrobenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid