4-hydroxy-4-methylpentanoic acid 4-hydroxy-4-methylpentanoic acid 4-hydroxy-4-methylpentanoic acid (umb68) is a tertiary alcohol, similar in structure to the drug ghb. the molecule has been synthesized and tested on animals in order to further research the effects of ghb. umb68 has been shown to bind selectively to the ghb receptor ligand in binding assays, yet does not bind to gabaergic receptors. as such, it can provide a useful tool in studying the pharmacology of the ghb receptor in absence of gabaergic effects. 4-hydroxy-4-methylpentanoic acidclinical dataother names4-hydroxy-4-methylpentanoic acididentifiers iupac name 4-hydroxy-4-methylpentanoic acid cas number23327-19-7 ychemspider10466768 yuniirbt229qvc5comptox dashboard (epa)dtxsid50633867 chemical and physical dataformulac6h12o3molar mass132.16 g·mol−13d model (jsmol)interactive image smiles oc(ccc(c)(o)c)=o inchi inchi=1s/c6h12o3/c1-6(2,9)4-3-5(7)8/h9h,3-4h2,1-2h3,(h,7,8) ykey:pqjumpxldazulj-uhfffaoysa-n y ny (what is this?) (verify)