[CH3:1][N:2]1[CH:6]=[C:5]([C:7]([O:9]CC)=[O:8])[N:4]=[N:3]1.[OH-].[Na+].Cl>CO>[CH3:1][N:2]1[CH:6]=[C:5]([C:7]([OH:9])=[O:8])[N:4]=[N:3]1Using ethyl 1-methyl-1H-1,2,3-triazole-4-carboxylate (1.48 g, 9.54 mmol), methanol (22 mL), 1N sodium hydroxide (15 mL) and 1N hydrochloric acid (15 mL) as starting materials and in the same manner as in Reference Example 12, the title compound (605 mg, 50%) was obtained as a white powder.
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