Acta Cryst. (2005). E61, o2467-o2469  [ doi:10.1107/S1600536805021525 ]

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

G.-D. Yin, Y.-F. Chen, B.-H. Zhou and A.-X. Wu

Abstract: In the title compound, C₂₆H₂₈N₆O₆, the dihedral angle between the two five-membered rings is 73.1 (2); that between the two phenyl rings is 60.1 (1)°.

Online 9 July 2005

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