2-[(E)-4-Diethyl-amino-2-hy-droxy-benzyl-idene]hydrazinecarboxamide.

Two mol-ecules make up the asymmetric unit of the title compound, C(12)H(18)N(4)O(2), and both feature an intra-molecular O-H⋯N hydrogen bond, which generates an S(6) ring. The diethyl-amino group of one of the mol-ecules is disordered over two sets of sites in a 0.59†(2):0.41†(2) ratio. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into sheets lying parallel to the ac plane and C-H⋯π inter-actions are also observed.