title: (E)-N'-(3,4-Dihydroxy-benzyl-idene)-4-nitro-benzohydrazide.
abstract: In the title Schiff base compound, C(14)H(11)N(3)O(5), the dihedral angle between the two benzene rings is 1.6 (1)°. The mol-ecule displays an E configuration about the C=N bond. An intra-molecular O-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked into layers parallel to (101) by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds. One of the hydroxyl groups is disordered over two positions, with occupancies of 0.643 (5) and 0.357 (5).
authors.affiliation: Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Qiu
authors.forename: Xiao-Jing
authors.initials: XJ
authors.lastname: He
authors.forename: Ya-Xin
authors.initials: YX
authors.lastname: Sun
authors.forename: Xu
authors.initials: X
authors.lastname: Zhu