Ethyl 4-(3,4-dichlorophenyl)-4-oxobutyrate

ethyl 6-(2,3-dichlorophenyl)-6-oxohexanoate

ethyl 4-(2,5-dichlorophenyl)-4-oxobutyrate

Ethyl 7-(4-t-butylphenyl)-7-oxoheptanoate

ethyl 7-(4-hexylphenyl)-7-oxoheptanoate

ethyl 8-(4-ethoxyphenyl)-8-oxooctanoate

Ethyl 6-oxo-6-(4-isopropoxyphenyl)hexanoate

Ethyl 4-(4-heptyloxyphenyl)-4-oxobutyrate

ethyl 8-(2,4-dimethoxyphenyl)-8-oxooctanoate

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

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