hydroxybutyric acid

Noun

 * 1)  Either of the isomeric compounds formed from a butyric acid by substituting a hydrogen atom with a hydroxyl group
 * 2) * alphahydroxybutyric acid - 2-hydroxy-butanoic acid
 * 3) * betahydroxybutyric acid - 3-hydroxy-butanoic acid
 * 4) * gammahydroxybutyric acid - 4-hydroxy-butanoic acid
 * 5) * 2-hydroxy, 2-methylpropanoic acid
 * 6) * 3-hydroxy, 2-methylpropanoic acid