title: 2-Hydr-oxy-5-nitro-benzaldehyde 2,4-dinitro-phenyl-hydrazone.
abstract: In the title compound, C(13)H(9)N(5)O(7), one of the nitro groups is twisted away from the attached benzene ring by 16.21 (8)°. The dihedral angle between the two benzene rings is 4.63 (1)°. The mol-ecular structure is stabilized by intra-molecular N-H⋯O and O-H⋯N hydrogen bonds which generate an S(6) ring motif. The mol-ecules pack as layers parallel to the ab plane; mol-ecules of adjacent layers are linked into chains along the [101] direction through N-H⋯O hydrogen bonds.
authors.forename: Abdassalam
authors.initials: A
authors.lastname: A Tameem
authors.forename: Bahruddin
authors.initials: B
authors.lastname: Saad
authors.forename: Abdussalam M
authors.initials: AM
authors.lastname: Salhin
authors.forename: Samuel Robinson
authors.initials: SR
authors.lastname: Jebas
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun