[Cl:1][C:2]1[CH:23]=[CH:22][CH:21]=[C:20]([Cl:24])[C:3]=1[CH2:4][N:5]1[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([CH2:14][CH2:15][C:16]([OH:18])=[O:17])[CH:12]=2)[C:7]([CH3:19])=[N:6]1.[OH-].[K+:26]>C(O)C>[Cl:1][C:2]1[CH:23]=[CH:22][CH:21]=[C:20]([Cl:24])[C:3]=1[CH2:4][N:5]1[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([CH2:14][CH2:15][C:16]([O-:18])=[O:17])[CH:12]=2)[C:7]([CH3:19])=[N:6]1.[K+:26]To a solution of the compound [122](24 mg) in ethanol (2.0 mL) was added an aqueous solution of 1N-potassium hydroxide (65 μL) at room temperature, and the solution was concentrated under reduced pressure to give the titled compound (27 mg) as a yellow solid.
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