title: 2-[7-Chloro-1,1-dioxo-2-(2,4,5-trifluoro-benz-yl)-3,4-dihydro-2H-1,2,4-benzothia-diazin-4-yl]acetic acid.
abstract: In the mol-ecule of the title compound, C(16)H(12)ClF(3)N(2)O(4)S, the thia-diazine ring adopts a half-chair conformation. The dihedral angle between the benzene ring of the benzothia-diazine ring system and trifluoro-phenyl group is 15.02 (7)°. In the crystal, centrosymmetrically related mol-ecules are linked into dimers via pairs of O-H⋯O hydrogen bonds, generating R(2) (2)(8) ring motifs. The dimers are further connected into a three-dimensional network by C-H⋯O hydrogen bonds.
authors.forename: Yanchun
authors.initials: Y
authors.lastname: Yang
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Guo
authors.forename: Changjin
authors.initials: C
authors.lastname: Zhu