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In the crystal of the title compound, C6H9N3·C6H8O2, the 2-amino-4,6-di­methyl­pyrimidine and sorbic acid mol­ecules are linked through N—H...O and O—H...N hydrogen bonds, which generate a cyclic bimolecular heterosynthon with an R22(8) graph-set motif. Further, two inversion-related pyrimidine mol­ecules are base-paired via a pair of N—H...N hydrogen bonds, forming a cyclic bimolecular homosynthon with a graph-set of R22(8). A discrete hetero tetra­meric supra­molecular unit along the b axis is formed by the fusion of two heterosynthons and one homosynthon. An aromatic π–π inter­action [centroid–centroid distance = 3.7945 (16) Å] is observed between these tetra­meric units.
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