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organic compounds
The title compound, C11H16N4O3 [6-amino-1,3-dimethyl-5-(4-oxo-2-penten-2-yl)amino-2,4(1H,3H)-pyrimidinedione], shows extensive delocalization in the uracil ring. There is an intramolecular hydrogen bond [NO 2.713 (3) Å] between an amino N—H group and an adjacent carbonyl O atom. The molecules are linked into sheets that are parallel to the (10) plane by intermolecular N-HO hydrogen bonds [NO 2.805 (3) and 2.803 (3) Å].