C(N(CCC)[C:5]1[CH:10]=[CH:9][C:8]([NH:11][C:12](=[O:27])[C:13]2[CH:18]=[CH:17][C:16]([CH2:19][NH:20][CH2:21][C:22]3[NH:23][CH:24]=[CH:25][N:26]=3)=[CH:15][CH:14]=2)=[CH:7][CH:6]=1)CC.[CH2:31]([N:33]1[CH:37]=[CH:36][N:35]=[C:34]1[CH:38]=O)[CH3:32].[C:40]([BH3-])#[N:41].[Na+].[OH-].[Na+]>CO.C(O)(=O)C>[CH2:6]([N:41]([CH2:40][C:5]1[CH:6]=[CH:7][C:8]([NH:11][C:12](=[O:27])[C:13]2[CH:14]=[CH:15][C:16]([CH2:19][N:20]([CH2:38][C:34]3[N:33]([CH2:31][CH3:32])[CH:37]=[CH:36][N:35]=3)[CH2:21][C:22]3[NH:26][CH:25]=[CH:24][N:23]=3)=[CH:17][CH:18]=2)=[CH:9][CH:10]=1)[CH2:7][CH2:8][CH3:9])[CH2:5][CH3:10]The compound (120 mg) obtained in Example 47-3 was dissolved in methanol (5.0 ml) and then added with the compound (58.0 mg) obtained in Example 90-1 and sodium cyanoborohydride (18.0 mg). Then, the solution was adjusted to pH 5 with acetic acid and then stirred at room temperature for 2 days. After completion of the reaction, a 1 mol/l sodium hydroxide aqueous solution was added to the reaction solution, followed by separation/extraction with chloroform. The organic layer was dried with anhydrous sodium sulfate and the solvent was then distilled off. The residue was purified through silica gel column chromatography (chloroform/methanol) and then treated with hydrochloric acid, thereby obtaining hydrochloride (107 mg) of the subject compound as a white solid.
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