To a solution of the 4-undecanoyloxybenzoic acid )0.3 g) obtained in (1) above and the 1,1,1-trifluoro-2-decyl-4-hydroxybenzoate (0.3 g) obtained in Example 12, (2) in tetrahydrofuran (about 30 ml) were added dicyclohexylcarbodiimide (0.25 g) and dimethylaminopyridine (0.01 g). The mixture was stirred at room temperature for about 20 hours. The solution was distilled to remove the solvent and the residue was dissolved in dichloromethane and washed with water. The organic layer was dried over anhydrous magnesium sulfate and was distilled to remove the solvent. The residue was purified by silica-gel column chromatography (developer : hexane/ethyl acetate=20/1) to obtain the titled compound (0.21 g).
