V H Vilchiz, R E Norman, S C Chang Acta Crystallogr C. 1996 Mar 15;52 ( Pt 3):696-8. doi: 10.1107/s0108270195013308.
The title compound, C7H13N3O2(2+).2Cl-, has distances and angles quite similar to those of histidine hydrochloride monohydrate [Donohue & Caron (1964). Acta Cryst. 17, 1178-1180], except for the distances within the ester functionality.
2. l-Serine methyl ester hydro-chloride
Arie Schouten, Martin Lutz Acta Crystallogr Sect E Struct Rep Online. 2009 Nov 7;65(Pt 12):o3026. doi: 10.1107/S1600536809046480.
In the enanti-opure crystal of the title compound, C(4)H(10)NO(3) (+)·Cl(-), inter-molecular O-H⋯Cl and N-H⋯Cl hydrogen bonds link the mol-ecules into layers parallel to (001).