title: 3,4-Dimethyl-2-(2-oxo-2-phenyl-eth-yl)-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zine-5,5-dione.
abstract: In the title mol-ecule, C(19)H(17)N(3)O(3)S, the heterocyclic thia-zine ring adopts a half-chair conformation with the S and N atoms displaced by 0.530 (5) and 0.229 (6) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The ethanone group lies at an angle of 3.8 (3)° with respect to the benzene ring, which lies almost perendicular to the pyrazole ring, with a dihedral between the two planes of 89.22 (11)°. Weak inter-molecular C-H⋯O hydrogen-bonding inter-actions are present.
authors.forename: Sana
authors.initials: S
authors.lastname: Aslam
authors.forename: Hamid Latif
authors.initials: HL
authors.lastname: Siddiqui
authors.forename: Matloob
authors.initials: M
authors.lastname: Ahmad
authors.forename: Iftikhar Hussain
authors.initials: IH
authors.lastname: Bukhari
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez