The molecule is the dicarboxylic acid dianion formed from (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinic acid by proton loss from both carboxy groups; major species present at pH 7.3. It is a conjugate base of a (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinic acid.
(2S,4S)-4-hydroxy-2,3,4,5-tetrahydropyridine-2,6-dicarboxylate