Methyl 4-[2-(N-Isopropyl-phenylsulfonylamino)-5-trifluoromethylphenylaminomethyl]benzoate (200 mg) prepared by the same procedure as Example 17 by using methyl 4-(2-phenylsulfonylamino-5-trifluoromethylphenylaminomethyl)benzoate (prepared in Example 27.) was dissolved in DMF (5 ml). Sodium hydride (64 mg) and methyl iodide (200 μl) were added thereto. The mixture was stirred for 24 hours at 60° C. The reaction mixture was extracted with H2O-AcOEt, washed, dried over, filtered and concentrated under the reduced pressure. The residue was purified on silica gel column chromatography (hexane:AcOEt=5:1) to give the title compound (105 mg) having the following physical data.
