Ethyl 8-oxo-8-(4-trifluoromethylphenyl)octanoate

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

ethyl 8-(2,3-dimethoxyphenyl)-8-oxooctanoate

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

ethyl 4-(2,6-dimethoxyphenyl)-4-oxobutyrate

ethyl 5-(3,4-dimethoxyphenyl)-5-oxovalerate

Ethyl 5-(4-methoxy-3-nitrophenyl)-5-oxovalerate

Ethyl 8-[3-(N,N-Dimethylamino)phenyl]-8-oxooctanoate

Ethyl 8-[4-(N,N-Dimethylamino)phenyl]-8-oxooctanoate

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

Ethyl 7-(4-Chloro-2-fluorophenyl)-7-oxoheptanoate