methyl 4-(tert-butylcarbamoyl)benzoate

tert-butyl 3,3-diphenylprop-2-enoate

tert-butyl 2-acetylhexanoate

tert-butyl 2-methyl-1,3-oxazole-4-carboxylate

tert-butyl 2-(2-oxononyl)-1,3-oxazole-4-carboxylate