[C:1]([C:6]1[CH:47]=[C:46]([C:48]([CH2:51][CH3:52])([CH3:50])[CH3:49])[CH:45]=[CH:44][C:7]=1[O:8][CH:9]([CH2:42][CH3:43])[C:10]([NH:12][C:13]1[CH:14]=[C:15]([CH:39]=[CH:40][CH:41]=1)[C:16]([NH:18][C:19]1[CH:23]([N:24]2[CH:28]=[CH:27][CH:26]=[N:25]2)[C:22](=[O:29])[N:21]([C:30]2[C:35]([Cl:36])=[CH:34][C:33]([Cl:37])=[CH:32][C:31]=2[Cl:38])[N:20]=1)=[O:17])=[O:11])([CH2:4][CH3:5])([CH3:3])[CH3:2].C(N(CC)CC)C.[C:60](OCl)(=[O:64])[CH2:61][CH2:62][CH3:63].C(OCC)(=O)C>O1CCCC1>[C:1]([C:6]1[CH:47]=[C:46]([C:48]([CH2:51][CH3:52])([CH3:49])[CH3:50])[CH:45]=[CH:44][C:7]=1[O:8][CH:9]([CH2:42][CH3:43])[C:10]([NH:12][C:13]1[CH:14]=[C:15]([CH:39]=[CH:40][CH:41]=1)[C:16]([NH:18][C:19]1[C:23]([N:24]2[CH:28]=[CH:27][CH:26]=[N:25]2)=[C:22]([O:29][C:60](=[O:64])[CH2:61][CH2:62][CH3:63])[N:21]([C:30]2[C:31]([Cl:38])=[CH:32][C:33]([Cl:37])=[CH:34][C:35]=2[Cl:36])[N:20]=1)=[O:17])=[O:11])([CH2:4][CH3:5])([CH3:3])[CH3:2]30.6 g of 3-{3-[2-(2,4-di-tert-amylphenoxy)butyramido]benzamido}-1-(2,4,6-trichlorophenyl)-4-(1-pyrazolyl)-5-oxo-2-pyrazoline (prepared by the method described in German Patent Application (OLS) No. 2,536,191) was dissolved in 100 ml of tetrahydrofuran and 5 g of triethylamine was added. To the solution, a solution containing 3.5 g of butanoyloxy chloride dissolved in 10 ml of tetrahydrofuran was dropwise added. After the addition of the solution, the mixture was stirred for 1 hour. 500 ml of ethyl acetate was added to the reaction mixture and washed several times with water. The oil layer was dried with anhydrous sodium sulfate and concentrated. Upon crystallization of the residue from acetonitrile, 24 g of Coupler (5) was obtained. The melting point of the coupler was 63° to 68° C.
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