ñ-Acetolactic acid is a precursor in the biosynthesis of the branched chain amino acids valine and leucine. ñ-Acetolactic acid is produced from two molecules of pyruvic acid by acetolactate synthase. ñ-Acetolactic acid can also be decarboxylated by alpha-acetolactate decarboxylase to produce acetoin. The name ñ-acetolactate is used for anion (conjugate base), salts, and esters of ñ-acetolactic acid.