(2E)-2-(3-Eth­oxy-2-hy­droxy­benzyl­idene)hydrazinecarboxamide

The title compound, C₁₀H₁₃N₃O₃, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. A classical intra­molecular O—H...N hydrogen bond is present. The two N atoms of the hydrazinecarboxamide unit are also involved in inter­molecular N—H...O hydrogen bonds, with the O atom of the hydrazinecarboxamide group acting as the acceptor. Pairs of N—H...O hydrogen bond link the mol­ecules into centrosymmetric dimers, which are linked by further N—H...O hydrogen bonds into chains along the b axis. The chains are linked by C—H...π inter­actions.