dimethyl 2-(cyclohexylcarbonyl)-2-methylmalonate
(R)-2-(4-Methoxy-2-nitro-phenoxy)-2-methyl-malonic acid monomethyl ester
(R)-2-(5-Fluoro-2-nitro-phenoxy)-2-methyl-malonic acid monomethyl ester
(2R)-3-methoxy-2-methyl-2-(4-methyl-2-nitrophenoxy)-3-oxopropanoic acid