title: 2-(3-Benzoyl-4-hy-droxy-1,1-dioxo-2H-1λ,2-benzothia-zin-2-yl)-1-phenyl-ethanone.
abstract: In the title mol-ecule, C(23)H(17)NO(5)S, the heterocyclic thia-zine ring adopts a half-chair conformation, with the S and N atoms displaced by 0.383 (3) and 0.473 (3) Å, respectively, on opposite sides of the mean plane formed by the ring C atoms. The phenyl rings attached to carbonyl groups lie almost parallel to each other at a dihedral angle 7.43 (9)°, the distance between the centroids of the rings being 3.780 (1) Å. The C(thia-zine)-C=O and O=C-CH(2) groups make dihedral angles of 37.56 (16) and 1.93 (18)°, respectively, with the phenyl groups to which they are attached. The crystal structure features O-H⋯O and C-H⋯O hydrogen bonds and further consolidated by C-H⋯π inter-actions; an intra-molecular O-H⋯O hydrogen bond is also present.
authors.forename: Nazia
authors.initials: N
authors.lastname: Sattar
authors.forename: Hamid Latif
authors.initials: HL
authors.lastname: Siddiqui
authors.forename: Syed Iftikhar Hussain
authors.initials: SI
authors.lastname: Bukhari
authors.forename: Matloob
authors.initials: M
authors.lastname: Ahmad
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez