3,3-Dimethyl-2-oxobutanoic acidTrimethylpyruvic acidTrimethylpyruvic acid3,3-Dimethyl-2-oxobutyric acid三甲基丙酮酸trimethylpyruvic acidbeta,beta-dimethyl-alpha-oxo-butyric acid3,3-dimethyl-2-oxobutanoic acidtrimethylpyroracemic acid2-oxo-3,3-dimethylbutanoic acid2-oxo-3,3-dimethylbutyric acidtert-butylglyoxylic acid3,3-dimethyl-2-oxobutyric acid