Ethyl 4-oxo-4-(2-trifluoromethylphenyl)butyrate

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

ethyl 7-(2,3-dichlorophenyl)-7-oxoheptanoate

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

Ethyl 8-(2,5-dichlorophenyl)-8-oxooctanoate

Ethyl 7-(4-isopropylphenyl)-7-oxoheptanoate

Ethyl 8-(4-t-butylphenyl)-8-oxooctanoate

ethyl 6-(4-hexylphenyl)-6-oxohexanoate

ethyl 4-(2-ethoxyphenyl)-4-oxobutyrate

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

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

ethyl 5-oxo-5-(4-pentyloxyphenyl)valerate

ethyl 4-(2,3-dimethoxyphenyl)-4-oxobutyrate

ethyl 8-(2,5-dimethoxyphenyl)-8-oxooctanoate

ethyl 6-(2,5-dimethoxyphenyl)-6-oxohexanoate