5,6-Diamino-1,3-dimethyluracil → 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(2,4-dimethoxy-3-methylphenyl)ethenyl)-1,3-dimethyl-, (E)-

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Substantially the same procedure as in Example 7 was repeated using 1.0 g (5.88 mmol) of 5,6-diamino-1,3-dimethyluracil and 1.44 g (6.45 mmol) of 2,4-dimethoxy-3-methylcinnamic acid. Then, the resultant crude crystals were recrystallized from dioxane to give 581 mg (yield 28%) of Compound 94 as pale yellow needles.

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