[CH3:1][N:2]([CH2:4][C:5]1[O:24][C:8]2[CH2:9][N:10]([C:13](=[O:23])[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])[CH2:11][CH2:12][C:7]=2[CH:6]=1)[CH3:3].[ClH:25]>CO.C(OCC)(=O)C>[ClH:25].[CH3:1][N:2]([CH2:4][C:5]1[O:24][C:8]2[CH2:9][N:10]([C:13](=[O:23])[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])[CH2:11][CH2:12][C:7]=2[CH:6]=1)[CH3:3]1-(2-Dimethylaminomethyl-5,7-dihydro-4H-furo[2,3-c]pyridin-6-yl)decan-1-one 0.135 g was dissolved in 2 ml of methanol; hydrogen chloride in ethyl acetate was added in excess, followed by stirring. After this mixture was concentrated, the resulting solid was washed with diethyl ether to yield the desired product.
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