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

Ethyl 4-oxo-4-(3-trifluoromethylphenyl)butyrate

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

ethyl 6-(4-ethylphenyl)-6-oxohexanoate

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

Ethyl 8-(4-t-butylphenyl)-8-oxooctanoate

ethyl 7-(2-ethoxyphenyl)-7-oxoheptanoate

Ethyl 4-(4-ethoxyphenyl)-4-oxobutyrate

ethyl 4-(4-hexyloxyphenyl)-4-oxobutyrate

ethyl 7-(4-hexyloxyphenyl)-7-oxoheptanoate

ethyl 8-(4-heptyloxyphenyl)-8-oxooctanoate

Ethyl 7-(2,4-dimethoxyphenyl)-7-oxoheptanoate

ethyl 7-(3,4-dimethoxyphenyl)-7-oxoheptanoate

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

Ethyl 8-(4-methoxy-3-nitrophenyl)-8-oxooctanoate