Hexanedioic acid, 3-(1,1-dimethylethyl)-, 6-methyl ester

Hexanoic acid, 4-(2-chloro-2-oxoethyl)-5,5-dimethyl-, methyl ester

5-bromo-4-(1',1'-dimethylethyl)pentanal

5-bromo-3-(1',1'-dimethylethyl)pentanal