1-O-ethyl 3-O-methyl 2-methylpropanedioate

2-(4-tert-Butyl-benzylsulfanylcarbonyl)-2-methyl-propionic acid ethyl ester

3-Bromo-2-(4-tert-butyl-benzylsulfanylcarbonyl)-2-methyl-propionic acid ethyl ester

4-(2,6-dichlorophenyl)-2-methyl-3-oxo-pentanoic acid ethyl ester

ethyl 4-(2-chloro-6-fluorophenyl)-2-methyl-3-oxohexanoate