[CH3:1][O:2][C:3]1[N:8]=[C:7]([O:9][CH3:10])[N:6]=[C:5]([NH:11][C:12](=S)[NH:13][S:14]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=2)(=[O:16])=[O:15])[N:4]=1.CC(C)=[O:26]>>[CH3:1][O:2][C:3]1[N:8]=[C:7]([O:9][CH3:10])[N:6]=[C:5]([NH:11][C:12]([NH:13][S:14]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=2)(=[O:16])=[O:15])=[O:26])[N:4]=1A mixture containing 2.7 g of N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminothioxomethyl]-2-pyridinesulfonamide, 2.98 g of mercuric oxide and 75 ml of acetone is stirred at ambient temperature for 60 hours and then filtered. Evaporation of the filtrate in vacuo yields the desired product.
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