4-[4-(2-nitro-phenyl)-oxazol-2-yl]-butyric acid methyl ester 、
2-溴-2′-硝基苯乙酮 、
6-carbamoyl-hexanoic acid ethyl ester 以gives 6-[4-(2-nitro-phenyl)-oxazol-2-yl]-hexanoic acid ethyl ester (3.19 g, 26%)的产率得到6-[4-(2-nitro-phenyl)oxazol-2-yl]-hexanoic acid ethyl ester