[CH3:1][N:2]([CH2:4][C:5]1[O:13][C:12]2[CH2:11][CH2:10][N:9]([C:14](=[O:29])[C:15]3[CH:20]=[CH:19][CH:18]=[C:17]([C:21](=[O:28])[C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:16]=3)[CH2:8][C:7]=2[CH:6]=1)[CH3:3].[ClH:30]>CO.C(OCC)(=O)C>[ClH:30].[CH3:3][N:2]([CH2:4][C:5]1[O:13][C:12]2[CH2:11][CH2:10][N:9]([C:14](=[O:29])[C:15]3[CH:20]=[CH:19][CH:18]=[C:17]([C:21](=[O:28])[C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:16]=3)[CH2:8][C:7]=2[CH:6]=1)[CH3:1]N,N-Dimethyl-[5-(3-benzoylbenzoyl)-4,5,6,7-tetrahydrofuro[3,2-c]pyridin-2-ylmethyl]amine 0.155 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 foam was washed with diethyl ether to yield the desired product.
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