Abstract
In the title compound, C12H7N3O2S, the dihedral angle between the planes of the thiazolopyridine ring system (r.m.s. deviation = 0.005 angstrom) and the benzene ring is 3.94 (6)degrees. The nitro group is rotated by 7.6 (2)degrees from its attached ring. In the crystal, extensive aromatic pi-pi stacking [shortest centroid-centroid separation = 3.5295 (9) angstrom] links the molecules into (001) sheets.