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In the title compound, C7H7NO·C6H3N3O7, one of the nitro groups of the picric acid mol­ecule lies in the plane of the attached benzene ring [dihedral angle = 1.4 (1)°] while the other two are twisted away by 9.9 (1) and 30.3 (1)°. In the benzamide mol­ecule, the amide group is almost coplanar with the benzene ring [dihedral angle = 4.4 (1)°]. An intra­molecular O—H⋯O hydrogen bond generates an S6 ring motif. In the crystal, mol­ecules are linked into a ribbon-like structure along the b axis by O—H⋯O and N—H⋯O inter­molecular hydrogen bonds. In addition, C—H⋯O hydrogen bonds and short O⋯O contacts [2.828 (2) Å] are observed.

In the title compound, C5H7N2 +·C6H2N3O7 −, there are two crystallographically independent cations and anions (A and B) in the asymmetric unit. In both picrate anions, one of the nitro groups lies in the plane of the benzene ring [r.m.s. deviations = 0.014 (2) and 0.014 (2) Å for anions A and B, respectively] and the other two are twisted away by 39.0 (2) and 18.8 (2)° in A, and 18.2 (1) and 2.5 (2)° in B. In the crystal, the cations and anions are linked by inter­molecular N—H⋯O and C—H⋯O hydrogen bonds, forming a two-dimensional network.

In the title compound, C15H11N3, the cyclo­hexene ring adopts a sofa conformation. An intra­molecular N—H⋯N hydrogen bond generates an S(7) ring motif. In the crystal, mol­ecules are linked by inter­molecular N—H⋯N, C—H⋯N and C—H⋯π inter­actions into a three-dimensional network.