ethyl 4-(3,5-dimethylphenyl)-2-methyl-4-oxobutyrate

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

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

ethyl 6-(2,5-dichlorophenyl)-6-oxohexanoate

ethyl 6-(4-isopropylphenyl)-6-oxohexanoate

ethyl 6-oxo-6-(4-n-pentylphenyl)hexanoate

ethyl 5-(2-ethoxyphenyl)-5-oxovalerate

ethyl 6-(2-ethoxyphenyl)-6-oxohexanoate

ethyl 5-oxo-5-(4-n-propoxyphenyl)valerate

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

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