2-Hy­droxy-N′-[2-(6-meth­oxy­naphthalen-2-yl)propano­yl]benzohydrazide

In the title compound, C21H20N2O4, the naphthalene ring system makes a dihedral angle of 84.5 (3)° with the benzene ring, and the –C(=O)–N(H)–N(H)–C(=O)– torsion angle is 70.7 (7)°, so that the mol­ecule is twisted. An S(6) ring motif is formed via an intra­molecular O—H⋯O hydrogen bond. In the crystal, mol­ecules are linked by N—H⋯O and C–H⋯O hydrogen bonds into supra­molecular layers in the ab plane

7-Bromo-9-(2-hy­droxy-4,4-dimethyl-6-oxocyclo­hex-1-en-1-yl)-3,3-dimethyl-2,3,4,9-tetra­hydro-1H-xanthen-1-one

In the xanthene ring system of the title compound, C23H25BrO4, the 4H-pyran ring is almost planar [maximum deviation = 0.040 (3) Å] and the cyclo­hexene ring adopts a sofa conformation. The cyclo­hexene ring attached to the xanthene system is puckered [Q T = 0.427 (3) Å, θ = 55.0 (4) ° and ϕ = 164.4 (6) °]. In the crystal, mol­ecules are linked to each other by O—H⋯O and C—H⋯O hydrogen bonds

4-[(2E)-2-(2-Hydroxybenzylidene)hydrazin-1-yl]benzonitrile

The asymmetric unit of the title Schiff base, C14H11N3O, contains two independent molecules which have similar conformations. The dihedral angles between the benzene rings are 4.19 (9) and 14.18 (9)° in the two molecules. An intramolecular O—H...N hydrogen bond stabilizes the molecular conformation of each molecules. The crystal packing is dominated by pairs of equivalent N—H...N and C—H...O hydrogen bonds which arrange the molecules into layers parallel to (-111)