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The title compound, C(24)H(14)O(9)·H(2)O, displays a cup-shaped form. The water mol-ecule is disordered over two set of sites with an occupancy ratio of 0.78:0.22. The mol-ecule of the compound has four stereocenters and corresponds to the SSRR/RRSS diastereoisomer. In the mol-ecule, the maximum dihedral angle between the planar benzene rings is 80.40 (4)°. The H atoms of the hy-droxy groups are engaged in hydrogen bonding, forming infinite chains parallel to the a axis. These chains are inter-linked through water mol-ecules, resulting in the formation of a two-dimensional network parallel to the (001) plane. Futhermore C-H⋯O, C-H⋯π and slipped π-π inter-actions result in the formation of a three-dimensional network.

The asymmetric unit of title compound, C(17)H(14)N(2)O(3), contains three independent mol-ecules. In one of these mol-ecules, the 5-methyl-2-furyl group is disordered over two sets of sites with an occupancy ratio of 0.747 (3):0.253 (3). In the two ordered mol-ecules, the furan and naphthalene rings are oriented at dihedral angles of 11.05 (12) and 32.2 (5)°. In the disordered mol-ecule, the furan rings with major and minor occupancies are oriented at dihedral angles of 41.4 (2) and 26.6 (13)°, respectively, with the corresponding naphthalene ring. An intra-molecular O-H⋯O hydrogen bond occurs within each mol-ecule. In the crystal, mol-ecules are linked by N-H⋯O, N-H⋯(N,O) and C-H⋯O inter-actions.

Corrigendum to Acta Cryst. (2010), E66, o1881., The name of one of the authors in the paper by Hussain et al. [Acta Cryst. (2010), E66, o1881] is corrected.

In the title compound, C(13)H(13)N(3)O, the phenyl and pyrrole rings are inclined at 47.45 (8)°. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds form R(2) (1)(6) ring motifs. Mol-ecules connected through these hydrogen bonds are arranged into polymeric chains extending along the c axis.

In the title compound, C15H13NO4·H2O, the organic molecule adopts a V-shaped conformation in which the dihedral angle between the five-membered rings is 68.33 (5)°. The cyclohexenone ring adopts an envelope conformation, with one of the methylene C atoms displaced by 0.607 (4) Å from the plane through the other atoms. In the crystal, intermolecular N—H...(O,O) and O—H...O hydrogen bonds link the components into (001) sheeets and C–H...O interactions and aromatic π–π stacking [centroid–centroid separation = 3.6176 (19) Å] help to consolidate the packing.

In the title compound, C(14)H(13)N(3)O(3), the two six-membered rings are oriented at a dihedral angle of 15.17 (11)° and an intra-molecular O-H⋯O hydrogen bond occurs. In the crystal, mol-ecules inter-act by way of N-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds, thereby generating S(5) chain and R(2) (1)(7) ring motifs.

In the title compound, C(15)H(14)N(2)O(3), the phenyl ring is disordered over two set of sites with an occupancy ratio of 0.810 (3):0.190 (3); the dihedral angle between the two components is 72.3 (4)°. The benzene and phenyl rings are oriented at dihedral angles of 69.18 (8) and 26.0 (5)° (major and minor orientations, respectively), and an intra-molecular O-H⋯O hydrogen bond occurs. In the crystal, mol-ecules are linked by N-H⋯O, O-H⋯O and C-H⋯O inter-actions, generating a three-dimensional network.

In the title compound, C(9)H(9)FN(2)O, the dihedral angle between the fluoro-benzene ring and the mean plane of the side chain is 15.59 (14)°. In the crystal, the mol-ecules form inversion dimers linked by pairs of N-H⋯O hydrogen bonds, resulting in R(2) (2)(8) loops. These dimers are reinforced by C-H⋯O inter-actions.

The title compound, C(7)H(8)N(2)O(2), is almost planar (r.m.s. deviation for non-H atoms = 0.029 Å). In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds generate an R(2) (2)(8) ring motif.

The title compound, C(12)H(9)BrN(2)OS·0.06H(2)O, is a hydrated Schiff base derived from benzoic hydrazide and 4-bromo-thio-phene-2-carboxaldehide. The two Schiff base mol-ecules in the asymmetric unit differ crystallographically: in one mol-ecule the dihedral angle between the benzene ring and thio-phene ring is 49.88 (11)°, whereas the other mol-ecule the rings are almost coplanar with an r.m.s. deviation for the non-H atoms of 0.025 Å. In the crystal, mol-ecules form polymeric sheets linked by N-H⋯O and C-H⋯O hydrogen bonds. The water mol-ecule of crystallization is partially occupied and its H atoms could not be located.

In the title compound, C18H17N3O4, the furyl and phenyl rings are inclined at almost right angles [85.77 (7) and 63.25 (7)°, respectively] to the central imidazo[1,2-a]pyridinyl unit. The structure displays both inter- and intramolecular N—H...O hydrogen bonding.