C([O:4][C:5]1[CH:6]=[CH:7][C:8]2[N:14]([C:15](=[O:17])[CH3:16])[CH2:13][CH2:12][CH2:11][CH2:10][C:9]=2[CH:18]=1)(=O)C.[OH-].[Na+].Cl>C(O)C.O>[C:15]([N:14]1[C:8]2[CH:7]=[CH:6][C:5]([OH:4])=[CH:18][C:9]=2[CH2:10][CH2:11][CH2:12][CH2:13]1)(=[O:17])[CH3:16]7-Acetoxy-1-acetyl-2,3,4,5-tetrahydro-1H-benzazepine (D23, 3.88 g, 16 mmol) was stirred in ethanol (40 ml) as NaOH (1.26 g, 32 mmol) was added in water (5 ml). After stirring for 30 min, the mixture was diluted with water (500 ml), and acidified with 5M HCl. The tan precipitate was filtered off and dried, yielding 2.02 g (63%) of the title compound. A further 0.80 g (25%) of this material was isolated by dichloromethane extraction of the filtrate.
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