ethyl 5-(3-methoxyphenyl)-1,2-oxazole-3-carboxylate

ethyl 5-(bromomethyl)-4,5-dihydro-1,2-oxazole-3-carboxylate

5-(3-三氟甲基苯基)-异噁唑-3-羧酸乙酯

5-溴甲基异噁唑-3-甲酸乙酯

5-(间甲苯)异噁唑-3-羧酸乙酯