Original: Î - Hydroxybutyric acid ( GHB ) , also known as 4-hydroxybutanoic acid and sodium oxybate ( INN ) when used for medicinal purposes , is a naturally occurring substance found in the central nervous system , wine , beef , small citrus fruits , and almost all animals in small amounts .
Simplified: Gamma-Hydroxybutyric acid ( Î - Hydroxybutyric acid , commonly shortened to GHB ; other names include 4-hydroxybutanoic acid and sodium oxybate ) is a chemical substance . Small quantities of it can be found in the central nervous system of many animals .