SMILES: C([C@H]([C@@H](C(=O)[O-])[NH3+])O)O
Description: The molecule is an amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of 4-hydroxy-L-threonine; major species at pH 7.3. It is a tautomer of a 4-hydroxy-L-threonine.