The crude product of the title compound was synthesized by conducting the similar reaction to that mentioned in Example 23 (23g) using {6-ethyl-5-[5-(4-isobutyl-3-methylphenyl)-1,2,4-oxadiazol-3-yl]pyridin-2-yl}methanol (0.15 g, 0.42 mmol) that was obtained in Example 29 (29a), carbon tetrabromide (0.28 g, 0.84 mmol), triphenylphosphine (0.22 g, 0.84 mmol), methyl 3-azetidinecarboxylate hydrochloride (96 mg, 0.63 mmol), and N,N-diisopropylethylamine (0.22 ml, 1.3 mmol). Subsequently, the crude product of the title compound thus obtained was purified by chromatography on a silica gel column using a mixed solvent of ethyl acetate and hexane (1:1 to 2:1) as the eluent to afford the title compound (0.13 g) in a yield of 71% as a colourless oily product.
