[C:1]1([CH2:7][CH2:8][CH:9]=[C:10]2[O:14][C:13](=[O:15])[N:12]([CH2:16][CH2:17][CH2:18][CH2:19][O:20][C:21]3[C:22]4[N:23]([CH:27]=[CH:28][N:29]=4)[CH:24]=[CH:25][CH:26]=3)[C:11]2=[O:30])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[ClH:31].C(OCC)(=O)C>CO>[ClH:31].[C:1]1([CH2:7][CH2:8][CH:9]=[C:10]2[O:14][C:13](=[O:15])[N:12]([CH2:16][CH2:17][CH2:18][CH2:19][O:20][C:21]3[C:22]4[N:23]([CH:27]=[CH:28][N:29]=4)[CH:24]=[CH:25][CH:26]=3)[C:11]2=[O:30])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1To a methanol solution of 15 mg (0.037 mmol) of 5-(3-phenylpropylidene)-3-[4-(imidazo[1,2-a]pyridin-8-yloxy)-butyl]oxazolidine-2,4-dione, 10 ml of 4N hydrochloric acid-ethyl acetate was added, followed by stirring, after which the solvent was distilled off, to yield 16 mg (97.8%, yellow oily substance) of the desired product.
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