The molecular conformation of the title compound, dimethyl )-1-[5-dime
thylamino-2-methoxy-3-methyl-4(3H)-oxo- 6-pyrimidinylamino]ethylene-1,
2-dicarboxylate, C14H20N4O6, in the solid state is determined by an in
tramolecular bifurcated hydrogen-bond system involving the H atom on t
he amino N6 atom and adjacent dimethylamino N5 and carbonyl O61 atoms
[N6 ... N5 2.722(2) and N6 ... 061 2.767(2) Angstrom].