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The title compound, C16H22N4O8, is a glycoluril derivative with two propoxycarbonyl substituents on the convex face of the glycoluril system. The dihedral angle between the five-membered rings in the glycoluril unit is 72.70&#8197;(2)&#176;. The oxadiazinane six-membered ring displays a normal chair conformation. One of the propyl groups is disordered over two positions with site occupancies of 0.557&#8197;(7) and 0.443&#8197;(7). Intermolecular C&#8212;H...O hydrogen bonds are effective in the stabilization of the crystal structure

Dipropyl 4,8-dioxo-1H,5H-2,6-dioxa-3a,4a,7a,8a-tetraazacyclopenta[def]fluorene-8b,8c-dicarboxylate