O.[OH-].[Li+:3].C[O:5][C:6]([C:8]1[O:9][C:10]2[CH2:11][N:12]([CH3:17])[CH2:13][CH2:14][C:15]=2[N:16]=1)=[O:7]>O1CCCC1>[CH3:17][N:12]1[CH2:13][CH2:14][C:15]2[N:16]=[C:8]([C:6]([O-:7])=[O:5])[O:9][C:10]=2[CH2:11]1.[Li+:3]Water (6.0 ml) and lithium hydroxide (99.7 mg) were added to a solution of 2-methoxycarbonyl-5-methyl-4,5,6,7-tetrahydrooxazolo[5,4-c]pyridine (800 mg) in tetrahydrofuran (24 ml) at room temperature, and the mixture was stirred for 10 minutes. The reaction mixture was concentrated under reduced pressure to obtain the title compound (825 mg).
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