Ethyl 4-oxo-4-(4-pyridyl)butyrate

ethyl 7-(3,4-dichlorophenyl)-7-oxoheptanoate

ethyl-8-methyl-7-oxononanoate

Ethyl 7-methyl-6-oxooctanoate

ethyl 7-(3-nitrophenyl)-7-oxoheptanoate

Ethyl 6-oxo-6-(3-trifluoromethylphenyl)hexanoate

ethyl 5-(2,3-dichlorophenyl)-5-oxovalerate

ethyl 5-(4-ethylphenyl)-5-oxovalerate

ethyl 4-(4-isopropylphenyl)-4-oxobutyrate

ethyl 6-oxo-6-(4-n-pentylphenyl)hexanoate

ethyl 8-(4-hexylphenyl)-8-oxooctanoate