rac-7-Oxabicyclo­[2.2.1]heptane-2,3-dicarboxylic acid–2-amino-1,3,4-thia­diazole–water (1/1/1)

The title compound, C8H10O5·C2H3N3S·H2O, was synthesized by the reaction of 2-amino-1,3,4-thia­diazole with norcantharidin. The crystal structure is stabilized by N—H⋯O, N—H⋯N, O—H⋯O and O—H⋯N hydrogen bonds. In addition, weak π–π inter­actions are observed between symmetry-related thia­diazole ring systems [centroid–centroid distance = 3.9110 (3) Å, inter­planar spacing = 3.4845 Å]