4,4-dimethyl-3-oxopentanoic acid

(2,4-dimethylphenyl) 2,2-dimethylpropanoate

1-dimethoxyphosphoryl-3,3-dimethylbutan-2-one

naphthalen-1-ylmethyl 2,2-dimethylpropanoate

2,2-dimethyl-1-naphthalen-2-ylpropan-1-one