Ethyl 6-oxo-6-(4-n-propoxyphenyl)hexanoate

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

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

ethyl 7-(2,5-dimethoxyphenyl)-7-oxoheptanoate

ethyl 7-(3,5-dimethoxyphenyl)-7-oxoheptanoate

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

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

Ethyl 4-(4-Chloro-2-fluorophenyl)-4-oxobutanoate

Ethyl 6-(4-Chloro-2-methoxyphenyl)-6-oxohexanoate

Ethyl 5-(2-Chloro-6-fluorophenyl)-5-oxovalerate

Ethyl 4-(2,3,4,5-tetrafluorophenyl)-4-oxobutanoate