ethyl 5-(4-heptyloxyphenyl)-5-oxovalerate

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

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

Ethyl 4-[3-(N,N-Dimethylamino)phenyl]-4-oxobutanoate

Ethyl 6-[4-(N,N-Diethylamino)phenyl]-6-oxohexanoate

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

Ethyl 7-(5-Chloro-2-methoxyphenyl)-7-oxoheptanoate

Ethyl 8-(2-Chloro-6-fluorophenyl)-8-oxooctanoate

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

Ethyl 6-(2,4,5-trimethoxyphenyl)-6-oxohexanoate

Ethyl 6-(4-n-Butylphenyl)-6-oxohexanoate