title: 2-Hy-droxy-3-nitro-benzaldehyde.
abstract: The title compound, C(7)H(5)NO(4), isolated from the leaves of Actephila merrilliana, is essentially planar (r.m.s. deviation = 0.026 Å). The conformation is supported by an intra-molecular O-H⋯O hydrogen bond, which generates an S(6) ring. In the crystal, C-H⋯O inter-actions and aromatic π-π stacking [centroid-centroid distance = 3.754 (4) Å] help to establish the packing.
authors: Key Laboratory of Tropical Medicinal Plant Chemistry of the Ministry of Education, Hainan Normal University, College of Chemistry & Chemical Engineering, Hainan Normal University, Haikou 571158, People's Republic of China.
authors: Bei
authors: B
authors: Tang
authors: Guangying
authors: G
authors: Chen
authors: Xiaoping
authors: X
authors: Song
authors: Changchun
authors: C
authors: Cen
authors: Changri
authors: C
authors: Han
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