C[O:2][C:3]([C:5]1[C:6]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([F:17])[CH:12]=2)=[N:7][O:8][C:9]=1[NH2:10])=[O:4].[OH-].[Na+]>CO>[NH2:10][C:9]1[O:8][N:7]=[C:6]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([F:17])[CH:12]=2)[C:5]=1[C:3]([OH:4])=[O:2]In a similar manner as described in Preparation Example 25, by using methanol (60 mL), methyl-5-amino-3-(3-fluorophenyl)isoxazol-4-carboxylate (6.0 g, 25.40 mmol) and 3% sodium hydroxide aqueous solution (60 mL), a white solid required compound (3.08 g, 13.86 mmol, 55%) was obtained.
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