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Figure 2 Portion of a hydrogen bonded sheet parallel to (1-21) showing N—H⋯O=C and O—H⋯O=C bonds between barbituric acid molecules and O—H⋯O bonds between barbituric acid and dioxane. N—H⋯O(hydroxy) interactions linking to two adjacent sheets are indicated by arrows. Dioxane H atoms are omitted for clarity. |