[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:26]=[CH:25][CH:24]=[C:23]4[C:18]=3[CH:19]=[CH:20][N:21]=[C:22]4[N:27]3[CH2:32][CH2:31][CH:30]([C:33]([O:35]CC)=[O:34])[CH2:29][CH2:28]3)[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10].O1CCCC1.CO.[OH-].[Li+:46]>O>[Li+:46].[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:26]=[CH:25][CH:24]=[C:23]4[C:18]=3[CH:19]=[CH:20][N:21]=[C:22]4[N:27]3[CH2:32][CH2:31][CH:30]([C:33]([O-:35])=[O:34])[CH2:29][CH2:28]3)[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10]A mixture of ethyl 1-[5-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-isoquinolinyl]-4-piperidinecarboxylate (D14; 35 mg, 0.067 mmol), tetrahydrofuran (THF) (2.0 ml), methanol (2.0 ml), water (1 ml) and lithium hydroxide (1.61 mg, 0.067 mmol) was left to stir at 80° C. for 3 h. The solvent was removed in vacuo and the residue was triturated with diethyl ether. The mixture was filtered to give the title compound as a pale peach coloured solid (20 mg).
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