[CH3:1][N:2]([CH2:4][C:5]1[O:27][C:8]2[CH2:9][N:10]([C:13](=[O:26])[CH2:14][O:15][C:16]3[CH:25]=[CH:24][C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[CH:17]=3)[CH2:11][CH2:12][C:7]=2[CH:6]=1)[CH3:3].[ClH:28]>CO.C(OCC)(=O)C>[ClH:28].[CH3:3][N:2]([CH2:4][C:5]1[O:27][C:8]2[CH2:9][N:10]([C:13](=[O:26])[CH2:14][O:15][C:16]3[CH:25]=[CH:24][C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[CH:17]=3)[CH2:11][CH2:12][C:7]=2[CH:6]=1)[CH3:1]1-(2-Dimethylaminomethyl-5,7-dihydro-4H-furo[2,3-c]pyridin-6-yl)-2-(2-naphthoxy)ethan-1-one 0.216 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, diethyl ether was added; the resulting solid was filtered and washed with diethyl ether to yield the desired product.
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