4-Hydroxy-4-methylpentanoic acid HOCPCA 3-Chloropropanoic acid T-HCA 2-Furanone NCS-382 Gamma-Hydroxybutyraldehyde GHB receptor Monastrol Levosulpiride Gabazine Aceburic acid Sultopride Gamma-Hydroxyvaleric acid Sulpiride Γ-Valerolactone 1,4-Butanediol Gallocatechol GABA analogue Gamma-Butyrolactone Sodium oxybate Gamma-Hydroxybutyric acid Amisulpride Prochlorperazine