[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([C:15](=O)[CH2:16][CH2:17][C:18]([OH:20])=[O:19])=[CH:11][CH:10]=2)[CH:5]=[CH:6][C:7]=1[Cl:8].C1(N)CCCCC1>C(O)(C)C>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([CH2:15][CH2:16][CH2:17][C:18]([OH:20])=[O:19])=[CH:11][CH:10]=2)[CH:5]=[CH:6][C:7]=1[Cl:8]Prepared analogous to Example 1 from 4-(3',4'-dichloro-4-biphenylyl)-4-oxo-butyric acid. Yield: 62% of theory. Melting point of the cyclohexylamine salt: 167°-168° C. (from isopropanol).
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