The molecule is a hydroxy monocarboxylic acid anion resulting from the deprotonation of the carboxy group of (R)-2-hydroxy-3-methylbutyric acid. The major species at pH 7.3. It is a conjugate base of a (R)-2-hydroxy-3-methylbutyric acid. It is an enantiomer of a (S)-2-hydroxy-3-methylbutyrate.
(2R)-2-hydroxy-3-methylbutanoate