| Summary: | The molecule of the title hydrazine derivative, C15H14N4O6, is
essentially planar, the dihedral angle between the substituted
benzene rings being 2.25 (9)�. The ethoxy and hydroxy groups
are almost coplanar with their bound benzene ring [r.m.s.
deviation = 0.0153 (2) A ° for the ten non-H atoms]. Intramolecular
N—H� � �O and O—H� � �Oethoxy hydrogen bonds
generate S(6) and S(5) ring motifs, respectively. In the crystal,
molecules are linked by O—H� � �Onitro hydrogen bonds into
chains propagating in [010]. Weak aromatic �–� interactions,
with centroid–centroid distances of 3.8192 (19) and
4.0491 (19) A ° , are also observed.
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