5-(2,4-dihydroxy-5-isopropylphenyl)-N-ethyl-4-(5-methyl-1,2,4-oxadiazol-3-yl)isoxazole-3-carboxamide 、
戊二酸酐 在
4-二甲氨基吡啶 作用下,
以to afford the title compound (55 mg, 0.11 mmol) in a yield of 60%的产率得到5-(4-(3-(ethylcarbamoyl)-4-(5-methyl-1,2,4-oxadiazol-3-yl)isoxazol-5-yl)-5-hydroxy-2-isopropylphenoxy)-5-oxopentanoic acid