ethyl 5-oxo-5-(3-pyridyl)valerate

ethyl 7-(4-nitrophenyl)-7-oxoheptanoate

Ethyl 5-oxo-5-(4-trifluoromethylphenyl)valerate

ethyl 6-(2,3-dichlorophenyl)-6-oxohexanoate

ethyl 4-(2,5-dichlorophenyl)-4-oxobutyrate

Ethyl 7-(4-t-butylphenyl)-7-oxoheptanoate

ethyl 7-(4-hexylphenyl)-7-oxoheptanoate

ethyl 8-(4-ethoxyphenyl)-8-oxooctanoate

Ethyl 6-oxo-6-(4-isopropoxyphenyl)hexanoate

Ethyl 4-(4-heptyloxyphenyl)-4-oxobutyrate

ethyl 8-(2,4-dimethoxyphenyl)-8-oxooctanoate