To 15 ml of a THF solution of 155 mg of the compound obtained in Example 35 were added 240 mg of p-methoxybenzylamine and 50 mg (0.362 mmol) of potassium carbonate, followed by refluxing for 60 hours. Chloroform was added to the reaction mixture, and the mixture was washed with a saturated sodium chloride aqueous solution. The combined organic layer was dried over anhydrous sodium sulfate, and the solvent was evaporated. The residue was subjected to silica gel column chromatography using a 99:1 mixture (by volume) of chloroform and methanol as a developing solution. The fraction containing the desired compound was concentrated to give 183 mg of the title compound.
