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The asymmetric unit of the title compound, 2C15H16N6O3·C3H7NO·H2O, contains two independent ethyl 6-methyl-2-oxo-4-[4-(1H-tetra-zol-5-yl)phen-yl]-1,2,3,4-tetra-hydro-pyrim-id-ine-5-carboxyl-ate mol-ecules, in which the dihedral angles between the tetra-zole and benzene rings are 20.54 (12) and 12.13 (12)°. An intra-molecular C-H⋯O hydrogen bond occurs in each mol-ecule. In the crystal, N-H⋯O, N-H⋯N, O-H⋯O and O-H⋯N hydrogen bonds, as well as weak C-H⋯O and C-H⋯N hydrogen bonds, link the mol-ecules into a three-dimensional supra-molecular architecture. π-π stacking is also observed between parallel tetra-zole rings of adjacent mol-ecules, the centroid-centroid distance being 3.482 (6) Å.

Ethyl 6-methyl-2-oxo-4-[4-(1H-tetrazol-5-yl)phenyl]-1,2,3,4-tetrahydropyrimidine-5-carboxylate–dimethylformamide–water (2/1/1)