title: Methyl 4-hydr-oxy-2H-1,2-benzothia-zine-3-carboxyl-ate 1,1-dioxide.
abstract: The asymmetric unit of the title compound, C(10)H(9)NO(5)S, contains two independent mol-ecules. The heterocyclic thia-zine rings in both mol-ecules adopt half-chair conformations, with the S atoms in each mol-ecule displaced by 0.455 (3) and 0.539 (3) Å and the N atoms displaced in the opposite direction by 0.214 (3) and 0.203 (3) Å, from the planes defined by the remaining ring atoms. The crystal structure is stabilized by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds involving both inter- and intra-molecular inter-actions.
authors.forename: Waseeq Ahmad
authors.initials: WA
authors.lastname: Siddiqui
authors.forename: Saeed
authors.initials: S
authors.lastname: Ahmad
authors.forename: Hamid Latif
authors.initials: HL
authors.lastname: Siddiqui
authors.forename: Mujahid Hussain
authors.initials: MH
authors.lastname: Bukhari
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez