[N+:1]([C:4]1[N:8]=[CH:7][NH:6][N:5]=1)([O-:3])=[O:2].[Cl:9][C:10]1[C:11](=[O:19])[NH:12][C:13](=[O:18])[NH:14][C:15]=1[CH2:16]Cl.Cl>[OH-].[K+]>[Cl:9][C:10]1[C:11](=[O:19])[NH:12][C:13](=[O:18])[NH:14][C:15]=1[CH2:16][N:6]1[CH:7]=[N:8][C:4]([N+:1]([O-:3])=[O:2])=[N:5]1To a solution of 0.88 g of 3-nitro-1,2,4-triazole in a 1N aqueous solution of KOH (10 ml), 0.50 g of 5-chloro-6-chloromethyluracil was added, followed by heating at 80° C. for 2.5 hours under stirring. The reaction mixture was neutralized with 6N hydrochloric acid. A precipitate was collected by filtration and then washed with water and methanol, whereby 510 mg of the title compound were obtained (yield: 73%).
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