4-03-00-00774 (Beilstein Handbook Reference) 4-Hydroxybutanoic acid 4-Hydroxybuttersaeure 4-Hydroxybutyric acid 591-81-1 BRN 1720582 Butanoic acid, 4-hydroxy- Butyric acid, 4-hydroxy- DEA No. 2100 GHB HYDROXYBUTYRIC ACID, GAMMA gamma-Hydroxybutyrate gamma-Hydroxybutyric acid