4309 2-Methyl-3-hydroxybutyric acid 3-Hydroxy-2-methyl-butanoic acid (HMBA) is a normal urinary metabolite involved in the isoleucine catabolism, as well as presumably beta-oxidation of fatty acids and ketogenesis, excreted in abnormally high amounts in beta-ketothiolase deficiency. Differences in the enantiomeric ratio of HMBA may originate from the enantioselectivity of different enzyme systems (A3337). 473-86-9 160471 C5H10O3 White powder. No indication of carcinogenicity to humans (not listed by IARC). This is an endogenously produced metabolite found in the human body. It is used in metabolic reactions, catabolic reactions or waste generation. 2014-08-29T06:07:40Z 2026-04-02T23:44:51Z 37051 true CC(O)C(C)C(O)=O C5H10O3 InChI=1S/C5H10O3/c1-3(4(2)6)5(7)8/h3-4,6H,1-2H3,(H,7,8) VEXDRERIMPLZLU-UHFFFAOYSA-N 118.1311 118.062994186 Endogenous Solid HMDB00354 141015 Inoue, Yoshio; Sano, Fumitaka; Nakamura, Kazuhiro; Yoshie, Naoko; Saito, Yuji; Satoh, Hiroyasu; Mino, Takashi; Matsuo, Tomonori; Doi, Yoshiharu. Microstructure of copoly(3-hydroxyalkanoates) produced in the anaerobic-aerobic activated sludge process. Polymer International (1996), 39(3), 183-9. CHEM003215 NS00014715 57.53 28.038600000000002 11.829094147373619 2 3 2 4.513689206767185 -2.7866129389831196 -1 0 -0.13 0.45 3.36e+02 g/l