1-[(5-tert-Butyl-2-hydroxy­phen­yl)­imino­meth­yl]-2-napthol

In the crystal structure of the title compound, C₂₁H₂₁NO₂, strong N—H...O and O—H...O hydrogen bonds exist. The keto–amine form is favoured over the enol–imine form in the tautomerism. Six-membered chelate rings formed by intra­molecular hydrogen bonds increase the stability of the whole mol­ecule. Inter­molecular hydrogen bonds link adjacent units together, forming an infinite one-dimensional chain parallel to the a axis.