N-[4-hydroxybutyl]-2-methyl-3-oxobutanamide

N-[4-[[dimethyl(1,1-dimethylethyl)silyl]oxy]butyl]-2-methyl-3-oxobutanamide

2-methyl-3-oxobutanoyl chloride

methyl (2S,4S,5R)-2-(tert-butyl)-5-methyl-3-(2-methyl-3-oxobutanoyl)oxazolidine-4-carboxylate