In the title compound, C11H17N5O4, the bond distances show evidence of a highly polarized molecular-electronic structure. The molecules are linked into a three-dimensional framework by a combination of O-H...O and N-H...O hydrogen bonds, including a very short O-H...O hydrogen bond [H...O=1.67 A, O...O=2.494 (2) A and O-H...O=166 degrees].