Ethyl 5-oxo-5-(3-trifluoromethylphenyl)valerate

ethyl 5-(4-t-butylphenyl)-5-oxovalerate

Ethyl 4-(4-hexylphenyl)-4-oxobutyrate

ethyl 7-(4-ethoxyphenyl)-7-oxoheptanoate

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