2-Amino-3-[(E)-(2-hy­droxy-3-methyl­benzyl­idene)amino]­but-2-ene­dinitrile

The title compound, C₁₂H₁₀N₄O, is a Schiff base obtained from the condensation of diamino­maleonitrile and 2-hy­droxy-3-methyl­benzaldehyde. The mol­ecule is roughly planar, with an r.m.s. deviation of 0.0354 Å, and adopts the phenol–imine tautomeric form. An intra­molecular O—H...N hydrogen bond involving the O—H group and the azomethine N atom generates an S(6) ring. In the crystal, there are two N—H...N hydrogen bonds.