ethyl 4,4-dimethyl-2,3-dioxopentanoate

2,2-dimethyl-1-(1-methylbenzimidazol-2-yl)propan-1-one

2,2-dimethyl-1-(1,3-thiazol-2-yl)propan-1-one

1-(1,3-benzoxazol-2-yl)-2,2-dimethylpropan-1-one

(2-bromo-4-methylphenyl) 2,2-dimethylpropanoate