ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, cilt.71, 2015 (ESCI)
The complete molecule of the title compound, C22H24N2O6, is generated by crystallographic inversion symmetry and is approximately planar (r.m.s. deviation of the non-H atoms = 0.134 angstrom). The packing consists of inter-digitated sheets inclined at 25.9 (4)degrees to one another and linked by short C-H center dot center dot center dot O hydrogen bonds.