Hydrogen-bond motifs in N-mono-substituted derivatives of barbituric acid: 5-allyl-5-isopropyl-l-methyl-barbituric acid (enallylpropymal) and 1,5-di(but-2-enyl)-5-ethylbarbituric: acid.

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    • Abstract:
      The article describes a study which obtained intergrown irregular-shaped crystals of enallylpropymal (5-allyl-5-isopropyl-1-methylbarbituric acid) from a commercial sample of narconumal. The study showed how both title structures exhibit essentially planar barbiturate rings. It also described the crystal structure of enallylpropymal and identified the fundamentals of each of the known crystal structures of closely related N-monosubstituted derivatives of barbituric acid.