Crystal structure of 1-ethyl­pyrazolo[3,4-d]pyrimidine-4(5H)-thione

In the title compound, C₇H₈N₄S, the methyl C atom is displaced by 1.232 (7) Å from the mean plane of the pyrazolo­[3,4-d]pyrimidine ring system (r.m.s. deviation = 0.007 Å). The N—N—C—C_m (m = meth­yl) torsion angle is −60.3 (6)°. In the crystal, mol­ecules are linked by N—H...S hydrogen bonds, generating [010] chains, which are reinforced by C—H...N inter­actions. The chains are cross-linked by weak C—H...S hydrogen bonds, generating (001) sheets.