tert-Butyl N-((1S)-2-hy­droxy-1-{N′-[(E)-2-hy­droxy-4-meth­oxy­benzyl­idene]hydrazinecarbon­yl}eth­yl)carbamate

The mol­ecule of the title compound, C(16)H(23)N(3)O(6), is twisted about the chiral C atom with the dihedral angle formed between the amide residues being 76.9 (3)°. Overall, the mol­ecule is curved with the terminal organic groups lying to the same side. The conformation about the imine bond [1.291 (5) Å] is E and an intra­molecular O—H⋯N hydrogen bond generates an S(6) ring. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds involving the hy­droxy, amine and carbonyl groups lead to the formation of supra­molecular layers, which stack along the c-axis direction.