4-Amino-N-(6-chloro-5-methoxy-pyrimidin-4-yl)benzene-sulfonamide.

In the title compound, C(11)H(11)ClN(4)O(3)S, the S atom is bonded in a distorted tetra-hedral geometry, by two O atoms, a C atom of the benzene ring and an amino N atom. The essentially planar pyrimidine ring [maximum deviation = 0.020 (1) Å] forms a dihedral angle of 87.57 (5)° with the benzene ring. In the crystal structure, pairs of mol-ecules are linked by inter-molecular N-H⋯O hydrogen bonds to generate centrosymmetric R(2) (2)(8) ring motifs. In addition, mol-ecules are linked into a three-dimensional extended network by inter-molecular N-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds.