2-[2-(3-Chlorophenyl)-2-oxoethyl]-4-hydroxy-3-(3-methoxybenzoyl)-2H-1λ6,2-benzothiazine-1,1-dione

In the title molecule, C24H18ClNO6S, the heterocyclic thiazine ring adopts a half chair conformation with the S and N atoms displaced by 0.318 (3) and 0.387 (3) Å, respectively, on the opposite sides from the mean plane formed by the remaining ring atoms. The benzene rings of the benzothiazin unit and methoxybenzoyl group are more or less coplanar, the dihedral angle between the mean planes of these rings being 12.37 (10)° while the chlorophenyl ring is inclined at 81.87 (4) and 73.30 (5)°, respectively, to these rings. The molecular structure is consolidated by intramolecular O—H...O and C—H...N interactions and the crystal packing is stabilized by weak intermolecular C—H...O hydrogen bonds