The molecule is a 3-oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It has a role as a Saccharomyces cerevisiae metabolite. It derives from a butyrate. It is a conjugate base of a (S)-2-acetyl-2-hydroxybutanoic acid.
(2S)-2-ethyl-2-hydroxy-3-oxobutanoate