title: 2,4-Dihydroxy-benzaldehyde 4-methyl-thio-semicarbazone.
abstract: The approximately planar mol-ecule of the title compound, C(9)H(11)N(3)O(2)S, is linked to adjacent mol-ecules by O-H⋯S hydrogen bonds to form a zigzag chain. Adjacent chains are consolidated by N-H⋯O hydrogen bonds into a two-dimensional array. An intramolecular O-H⋯N link is also present.
authors.forename: Kong Wai
authors.initials: KW
authors.lastname: Tan
authors.forename: Chew Hee
authors.initials: CH
authors.lastname: Ng
authors.forename: Mohd Jamil
authors.initials: MJ
authors.lastname: Maah
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng