ethyl 4-(4-t-butylphenyl)-4-oxobutyrate

ethyl 8-oxo-8-(4-pentyloxyphenyl)octanoate

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

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

ethyl 8-(2,6-dimethoxyphenyl)-8-oxooctanoate

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

Ethyl 7-(4-methoxy-3-nitrophenyl)-7-oxoheptanoate

Ethyl 5-(2-Chloro-4-fluorophenyl)-5-oxovalerate

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

Ethyl 6-(2-Chloro-4-(methylthio)phenyl)-6-oxohexanoate

Ethyl 6-(2-Chloro-4,5-difluorophenyl)-6-oxohexanoate