The molecule is a carboxamidine heterocycle which is obtained by formal condensation of 4-amino-L-allothreonine with acetic acid. It is a carboxamidine, a secondary alcohol, a member of 1,4,5,6-tetrahydropyrimidines and a monocarboxylic acid. It is a conjugate acid of a 5-hydroxyectoinate. It is a tautomer of a 5-hydroxyectoine zwitterion.
(5S,6S)-5-hydroxy-2-methyl-1,4,5,6-tetrahydropyrimidine-6-carboxylic acid