Acta Cryst. (2008). E64, o1877  [ doi:10.1107/S1600536808027785 ]

10,11,12,13-Tetrahydro-4,5,9,14-tetraazadibenz[a,c]anthracene-benzene-1,4-dicarboxylic acid (2/1)

C.-B. Liu, J. Wang, X.-Y. Li, G.-B. Che and Y. Liu

Online 6 September 2008

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