ethyl 5-oxo-5-(4-thiomethylphenyl)valerate

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

Ethyl 4-(3-cyanophenyl)-4-oxobutyrate

Ethyl-5-(4-cyanophenyl)-5-oxovalerate

Ethyl 4-(3,5-difluorophenyl)-2,2-dimethyl-4-oxobutyrate

ethyl 2,2-dimethyl-4-(3-fluorophenyl)-4-oxobutyrate

Ethyl 8-cyclohexyl-8-oxooctanoate

Ethyl 5-cyclobutyl-5-oxovalerate

Ethyl 6-cyclopropyl-6-oxohexanoate

Ethyl 4-oxooctanoate

Ethyl 4-oxononanoate