[CH3:1][C:2]1[O:6][C:5]([C:7]([NH:9][C:10]([C:13]2[N:19]([CH3:20])[C:17](=[O:18])[C:16]([OH:21])=[C:15]([C:22]([NH:24][CH2:25][C:26]3[CH:27]=[CH:28][C:29]([F:32])=[CH:30][CH:31]=3)=[O:23])[N:14]=2)([CH3:12])[CH3:11])=[O:8])=[N:4][N:3]=1.[OH-].[K+:34]>C(#N)C>[CH3:1][C:2]1[O:6][C:5]([C:7]([NH:9][C:10]([C:13]2[N:19]([CH3:20])[C:17](=[O:18])[C:16]([O-:21])=[C:15]([C:22]([NH:24][CH2:25][C:26]3[CH:27]=[CH:28][C:29]([F:32])=[CH:30][CH:31]=3)=[O:23])[N:14]=2)([CH3:12])[CH3:11])=[O:8])=[N:4][N:3]=1.[K+:34]A vial (20 ml) was charged with Raltegravir free hydroxy (0.5 g) and acetonitrile (7.5 mL) to obtain a solution. KOH 85% (75.6 mg) was added to the solution at room temperature. The solution was then sonicated for 40 minutes. The product was isolated by vacuum filtration to provide Raltegravir potassium Form X.
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