The title pyrimidine derivative, C7H8N4S, is essentially planar, with a maximum deviation of 0.029 (2) A ° from the mean plane of the non-H atoms. In the crystal, molecules are linked by an intermolecular bifurcated N—H N hydrogen bond between the cyano N atom and the two amino groups, an N—H N hydrogen bond between the two amino groups and ...
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