SMILES: C([C@H](C=O)O)[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is the L-alpha-amino acid zwitterion formed from L-4-hydroxyglutamic semialdehyde by transfer of a proton from the carboxy to the amine group; it is the principal microspecies at pH 7.3. It is a tautomer of a L-4-hydroxyglutamic semialdehyde.