ethyl 3-hydroxy-2,2-dimethylbutanoate

ethyl 3-anilino-2,2-dimethyl-3-oxopropanoate

ethyl 2,2-dimethyl-3-oxohexanoate

ethyl 5-bromo-2,2-dimethylpentanoate

diethyl 2,2,4-trimethylpentanedioate