N,N'-bis(2-hydroxybenzylidene)pentane-1,5-diamine.

In the title potential O,N,N′,O′-tetra­dentate Schiff base ligand {systematic name: 2,2′-[pentane-1,5-diylbis(nitrilo­methyl­idyne)]diphenol}, C19H22N2O2, the mutual orientation of the three planar fragments determines the conformation of the mol­ecule. The dihedral angles between the planes of the two salicyl­idene groups and the plane of the central extended pentane chain are 78.4 (2) and 62.0 (3)°, and the angle between the terminal ring planes is 55.4 (1)°. Strong intra­molecular O—H⋯N hydrogen bonds close almost-planar six-membered rings, and the O—H bonds are elongated as a result of hydrogen-bond formation.