[C:1]([Cl:9])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:10][C:11]1[O:15][C:14]([C:16]2[S:20][C:19]([CH2:21][N:22]3[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]3)=[CH:18][CH:17]=2)=[N:13][N:12]=1>N1C=CC=CC=1>[ClH:9].[N:22]1([CH2:21][C:19]2[S:20][C:16]([C:14]3[O:15][C:11]([NH:10][C:1](=[O:8])[C:2]4[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=4)=[N:12][N:13]=3)=[CH:17][CH:18]=2)[CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28]11.8 ml (15.0 mmol) of benzoyl chloride was added to 15 ml of pyridine solution containing 278 mg (1.0 mmol) of the compound of Example 43, and the mixture was stirred at 80° C. for 10 days. The reaction solution was concentrated under a reduced pressure, chloroform was added to the resulting residue, followed by washing with water and drying over anhydrous magnesium sulfate. The solvent was evaporated, the resulting residue was purified by a silica gel column chromatography. Then, the resulting crude crystals were recrystallized from ethanol-diisopropyl ether to give 241 mg of the title compound.
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