ethyl 3-bromo-3-methylbutanoate

5-ethoxy-2-(3-ethoxy-3-oxopropyl)-3,3-dimethyl-5-oxopentanoate

1-O-ethyl 3-O-propyl 2-(trifluoromethyl)propanedioate

1-O-ethyl 3-O-propan-2-yl 2-(trifluoromethyl)propanedioate

1-O-butyl 3-O-ethyl 2-(trifluoromethyl)propanedioate