Abstract
In the title hydrazone derivative, C
15
H
14
N
2
O
5
, the benzene rings are twisted by 7.55 (8)° with respect to each other. The azomethine double bond adopts an
E
conformation. The molecular structure is stabilized by intramolecular O—H⋯N and N—H⋯O hydrogen bonds, generating
S
6 ring motifs. In the crystal, molecules are linked into a three-dimensional network by O—H⋯O hydrogen bonds.