2-Hydroxy-pentanedioic acid 2-Hydroxyglutaric acid 2-hydroxypentanedioic acid 636-67-9 InChI=1/C5H8O5/c6-3(5(9)10)1-2-4(7)8/h3,6H,1-2H2,(H,7,8)(H,9,10 pentanedioic acid, 2-hydroxy-