L-Histidinol Phosphate Tetrahydrate

In the crystal structure of the title compound, C₆H₁₂N₃O₄P.4H₂O, the amino group is protonated by the phosphate group. The phosphate group is trans planar to the central asymmetric C atom and projects out the plane of the imidazole ring. The crystal structure is stabilized by a three-dimensional network of all possible hydrogen bonds.

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