[CH3:1][N:2]([CH2:4][C:5]1[O:13][C:12]2[CH2:11][CH2:10][N:9]([C:14](=[O:31])[C:15]3[CH:20]=[CH:19][C:18]([C:21](=[O:30])[C:22]4[CH:27]=[C:26]([Cl:28])[CH:25]=[C:24]([Cl:29])[CH:23]=4)=[CH:17][CH:16]=3)[CH2:8][C:7]=2[CH:6]=1)[CH3:3].Cl>CO.C(OCC)(=O)C>[ClH:28].[CH3:3][N:2]([CH2:4][C:5]1[O:13][C:12]2[CH2:11][CH2:10][N:9]([C:14](=[O:31])[C:15]3[CH:20]=[CH:19][C:18]([C:21](=[O:30])[C:22]4[CH:23]=[C:24]([Cl:29])[CH:25]=[C:26]([Cl:28])[CH:27]=4)=[CH:17][CH:16]=3)[CH2:8][C:7]=2[CH:6]=1)[CH3:1]N,N-Dimethyl-[5-[4-(3,5-dichlorobenzoyl)benzoyl]-4,5,6,7-tetrahydrofuro[3,2-c]pyridin-2-ylmethyl]amine 0.200 g was dissolved in 2 ml of methanol; hydrogen chloride in ethyl acetate was added in excess, followed by stirring. This was concentrated and washed with diethyl ether to yield the desired product.
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