[C:1]([O:4][CH2:5][C:6](OC)=[CH:7][C:8](=[O:13])[C:9]([Cl:12])([Cl:11])[Cl:10])(=[O:3])[CH3:2].[Cl:16][C:17]1[C:18]([NH:23][NH2:24])=[N:19][CH:20]=[CH:21][CH:22]=1>C(O)C>[C:1]([O:4][CH2:5][C:6]1[CH2:7][C:8]([OH:13])([C:9]([Cl:10])([Cl:11])[Cl:12])[N:23]([C:18]2[C:17]([Cl:16])=[CH:22][CH:21]=[CH:20][N:19]=2)[N:24]=1)(=[O:3])[CH3:2]27.5 g (0.1 mol) of 5,5,5-trichloro-2-methoxy-4-oxopent-2-en-1-yl acetate and 14.4 g (0.1 mol) of 3-chloro-2-hydrazinopyridine were initially charged in 200 ml of ethanol, and the mixture was stirred at 25° c. for 3 h. The precipitate was filtered off and washed with cyclohexane.
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