3-(3-Fluorophenyl)-2-propenoic acid → 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(3-fluorophenyl)ethenyl)-, (E)-

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Substantially the same procedure as in Reference Example 70 was repeated using 3.00 g (15.1 mmol) of 5,6-diamino-1,3-diethyluracil and 2.77 g (16.7 retool) of 3-fluorocinnamic acid. Then, the resultant crude crystals were recrystallized from dioxane/water to give 1.96 g (yield 40% of Compound 127 as a pale yellow powder.

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