3,3,6,6-Tetrakis­(hydroxy­meth­yl)-1,2,4,5-tetra­zinane tetra­hydrate

In the title compound, C6H16N4O4·4H2O, the tetra­zinane mol­ecule lies across an inversion centre. The tetra­zinane ring adopts a chair conformation, and all imino H atoms occupy axial positions. In the crystal, adjacent mol­ecules are linked through O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds with water mol­ecules generating a three-dimensional network