Acta Cryst. (2005). E61, o3364-o3365  [ doi:10.1107/S1600536805027625 ]

Diethyl 2,6-bis(2-hydroxyethyl)-4,8-dioxo-1,2,5,6-tetrahydrohydro-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-8b,8c-dicarboxylate

Y.-T. Li, Y.-F. Chen, N.-F. She and A.-X. Wu

Abstract: In the title glycoluril derivative, C₁₈H₂₈N₆O₈, the N-C_carbonyl bond distances are much shorter than the other N-C bond distances in the same five-membered ring, indicating electron delocalization within the nearly planar ring. Both six-membered rings display chair conformations.

Online 21 September 2005

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