4-Hy-droxy-3-meth-oxy-benzaldehyde 4-phenyl-thio-semicarbazone.

In the title compound, C15H15N3O2S, the central C-N-N-C unit has an anti conformation [torsion angle = -170.17 (15)°]. The phenyl substituent is oriented perpendicular to this unit [dihedral angle of 89.2 (1)°], whereas the substituted ring is rotated out of this plane by only 18.86 (17)°. In the crystal, mol-ecules are linked by pairs of N-H⋯S hydrogen bonds into inversion dimers that are further connected via N-H⋯O and O-H⋯S hydrogen bonds into a three-dimensional network.