Abstract
The title compound, C
9
H
10
BrNO
4
S, is an intermediate for the formation of benzothiazines. In the crystal structure, intermolecular N—H⋯O hydrogen bonds link the molecules, forming
R
2
2
(10) ring motifs, which are linked into a two-dimensional polymeric sheet through intermolecular C—H⋯O hydrogen bonds.