5-butyl-6-methyl-2-thioxo-2,3-dihydro-pyrimidin-4(1H)-one

In the title compound, C9H14N2OS, the butyl group is disordered over two orientations. In the crystal structure, the inversion-related molecules are linked by N-H center dot center dot center dot O [N center dot center dot center dot O = 2.823 (3) angstrom] and N-H center dot center dot center dot S [N center dot center dot center dot S = 3.346 (2) angstrom] hydrogen bonds to form chains along [210].