Acta Cryst. (2007). E63, o65-o66  [ doi:10.1107/S1600536806050926 ]

Diethyl 2,13-dioxo-16,18-dioxa-1,3,12,14-tetraazapentacyclo[10.7.2.0^3,21.0^5,10.0^14,20]undeca-5,7,9-triene-20,21-dicarboxylate

B.-H. Zhou, L.-P. Cao, Y.-Z. Wang and M. Gao

Online 6 December 2006

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