title: N'-[(2-Hy-droxy-naphthalen-1-yl)methyl-idene]-4-nitro-benzohydrazide.
abstract: In the title mol-ecule, C(18)H(13)N(3)O(4), the hy-droxy group is involved in the formation of an intra-molecular O-H⋯N hydrogen bond. The dihedral angle between the planes of the benzene ring and the naphthyl ring system is 9.0 (2)°. In the crystal, mol-ecules are linked through N-H⋯O hydrogen bonds into chains along the c axis.
authors.affiliation: Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai 201306,  People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: An
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Li
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Zhang