Diethyl 2,6-diethyl-4,8-dioxo-2,3,6,7-tetrahydro-1H,5H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-8b,8c-dicarboxylate

Abstract

The title compound, C18H28N6O6, is a derivative of glycoluril, with two ethyl acetate substituents on the convex face of the glycoluril system. Two equivalent six-membered rings bind the N atoms from separate rings of the glycoluril unit to form the flexible sidewalls of a mol­ecular clip. One N atom from each ring carries an ethyl substituent. The crystal packing is stabilized by non-classical C—H⋯O hydrogen bonds.