L-Asparagine-L-tartaric acid (1/1)

In the title compound, C(4)H(8)N(2)O(3)center dot C(4)H(6)O(6), the amino acid molecule exists as a zwitterion and the carboxylic acid in an un-ionized state. The tartaric acid molecules are linked into layers parallel to the ab plane by O-H center dot center dot center dot O hydrogen bonds. The amino acid molecules are also linked into layers parallel to the ab plane by N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds. The alternating tartaric acid and amino acid layers are linked into a three-dimensional framework by N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds.