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(i) Synthesis of 4-(4-n-propylphenyl)benzoic acid 4-(4-n-propylphenyl)benzoic acid was obtained in the same manner as in the step (i) of the Example 109, except for using 4-n-propyl-4'-bromobiphenyl instead of 1-(trans-4-n-propylcyclohexyl)-4-bromobenzene.