Acta Cryst. (2008). C64, o171-o176 [ doi:10.1107/S0108270108004228 ]
Formula: C7H13N3O5·H2O, C12H16N2O5·H2O, C14H17N3O4·H2O and C20H21N3O4·H2O
Online 23 February 2008
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