hydroxybutyric acid 2,3-dihydroxybutanoic acid 120.042 120.10390 2,3-dihydroxybutanoic acid 4-deoxy-erythronic acid A hydroxybutyric acid substituted by hydroxy groups at positions 2 and 3 respectively. C4H8O4 CC(O)C(O)C(O)=O CHEBI:86347 InChI=1S/C4H8O4/c1-2(5)3(6)4(7)8/h2-3,5-6H,1H3,(H,7,8) LIPID_MAPS_instance:LMFA01050397 LOUGYXZSURQALL-UHFFFAOYSA-N Reaxys:1721655 chebi_ontology