[Cl:1][C:2]1[CH:3]=[C:4]2[C:8](=[N:9][CH:10]=1)[N:7]([CH2:11][CH3:12])[C:6](=[O:13])[CH2:5]2.[O:14]1[CH:18]=[CH:17][CH:16]=[C:15]1[C:19](Cl)=[O:20]>CN(C)C1C=CN=CC=1.CN(C=O)C>[Cl:1][C:2]1[CH:3]=[C:4]2[C:8](=[N:9][CH:10]=1)[N:7]([CH2:11][CH3:12])[C:6](=[O:13])[CH:5]2[C:19]([C:15]1[O:14][CH:18]=[CH:17][CH:16]=1)=[O:20]The title compound was prepared from 5-chloro-1-ethyl-7-azaoxindole (Example 53D) according to the procedure of Example 53E, using 5-chloro-1-ethyl-7-azaoxindole (405 mg, 2.06 mmol), 4-dimethylaminopyridine (500 mg, 4.09 mmol), 2-furoyl chloride (0.22 mL, 2.23 mmol) and DMF (10 mL). The solid product obtained following chromatography was recrystallized from hexane. The yield was 110 mg (18%).
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