title: 2,7-Dimethyl-1,3-thia-zolo[4,5-d]pyridazin-4(5H)-one.
abstract: The nine-membered fused-ring system of the title pyridazine derivative, C(7)H(7)N(3)OS, is almost planar (r.m.s. deviation 0.012 Å). In the crystal, the amino H atom forms a hydrogen bond to the ketonic O atom of a neighboring mol-ecule to generate a centrosymmetric dimer.
authors: Abdulrahman O
authors: AO
authors: Al-Youbi
authors: Abdullah M
authors: AM
authors: Asiri
authors: Hassan M
authors: HM
authors: Faidallah
authors: Seik Weng
authors: SW
authors: Ng