ChEBI: 4-hydroxy-2-oxohexanoic acid is a hydroxy- and oxo- fatty acid comprising hexanoic acid substituted at C-2 and C-4 with oxo and hydroxy groups respectively. It is a 2-oxo monocarboxylic acid, a 4-hydroxy monocarboxylic acid, an oxo fatty acid and a hydroxy fatty acid. It is functionally related to a hexanoic acid. It is a conjugate acid of a 4-hydroxy-2-oxohexanoate.