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

ethyl 6-(2,4-dichlorophenyl)-6-oxohexanoate

ethyl 4-(4-ethylphenyl)-4-oxobutyrate

ethyl 8-(4-ethylphenyl)-8-oxooctanoate

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

ethyl 5-(4-ethoxyphenyl)-5-oxovalerate

ethyl 8-oxo-8-(4-n-propoxyphenyl)octanoate

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

ethyl 8-(4-hexyloxyphenyl)-8-oxooctanoate

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

ethyl 5-(2,4-dimethoxyphenyl)-5-oxovalerate

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

ethyl 8-(3,5-dimethoxyphenyl)-8-oxooctanoate

Ethyl 5-[3-(N,N-Dimethylamino)phenyl]-5-oxovalerate

Ethyl 4-[4-(N,N-Diethylamino)phenyl]-4-oxobutanoate