ethyl 5-(2,6-difluorophenyl)-5-oxovalerate

Ethyl 5-cyclopentyl-5-oxovalerate

Ethyl 8-cyclobutyl-8-oxooctanoate

Ethyl 5-oxoheptanoate

Ethyl 7-oxoundecanoate

Ethyl 5-oxo-6,6,6-trifluorohexanoate

Ethyl 4-(2-oxo-2-phenylethyl)benzoate

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

ethyl 6-(3-bromo-4-methylphenyl)-6-oxohexanoate

ethyl 7-(2-iodophenyl)-7-oxoheptanoate

ethyl 4-(4-iodophenyl)-4-oxobutyrate