The title compound, C(15)H(14)N(2)O(5)·CH(3)OH, displays an E conformation about the azomethine double bond [C=N = 1.277 (2) Å] and the benzene rings are inclined to one another by 18.28 (9)°. An intra-molecular O-H⋯O hydrogen bond occurs between the para-OH group and one of the meta-O atoms of the 3,4,5-trihy-droxy-benzyl-idene group. In the crystal, the components are linked into a three dimensional network by O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds.