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In the title compound, C 21 H 22 N 2 O 8 , both of the nonplanar six-membered heterocycles adopt chair conformations. The dihedral angle between the terminal benzene rings is 58.22 (11)°. Weak inter­molecular C—H⋯O inter­actions are observed in the crystal structure.

3,9-Dimethyl-3,9-bis(4-nitrophenyl)-2,4,8,10-tetraoxaspiro[5.5]undecane