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Acta Cryst. (2012). C68, o92-o98 [ doi:10.1107/S0108270112001151 ]
Formula: C5H6N2O4, C5H4N2O4·C2H6OS, C2H8N+·C5H3N2O4-·C5H4N2O4 and 3C2H8N+·3C5H3N2O4-·C5H4N2O4
Online 18 January 2012
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