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Figure 2
Three possible combinations of the hy­droxy and amino H atoms, the probabilities being (a) 25%, (a′) 25% and (b) 50%. Purple dotted lines indicate the intra­molecular N—H⋯O and O—H⋯N hydrogen bonds. Other H atoms have been omitted for clarity.

ISSN: 2056-9890
Volume 72| Part 3| March 2016| Pages 343-346
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