(E)-1-[(2-Hy­droxy-1-naphth­yl)methyl­idene­amino]­imidazolidine-2,4-dione

The title compound, C(14)H(11)N(3)O(3), adopts an E or trans configuration with respect to the C=N bond. In the mol­ecule there is an intra­molecular O—H⋯N hydrogen bond involving the hy­droxy substituent at the 2-positon of the naphthalene ring and the adjacent methyl­ene­amino N atom. The mol­ecule is roughly planar, the dihedral angle between the naphthalene and imidazolidine-2,4-dione mean planes being 8.4 (1)°. In the crystal, pairs of N—H⋯O hydrogen bonds link mol­ecules into inversion dimers. These dimers are futher linked via C—H⋯O inter­actions, forming a three-dimensional network.