1-溴-3-甲基-2-丁酮

trimethylsilyl 2-methyl-3-oxobutane-2-sulfonate

trimethylsilyl 3-methyl-2-oxobutane-1-sulfonate

3-chloro-2,5-di(propan-2-yl)pyrazine

1-azido-3-methylbutan-2-one