5-(4-(三氟甲基)苯基)异噁唑-3-羧酸乙酯

ethyl 2H-1,2,4-benzoxadiazine-3-carboxylate

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

O-ethyl hydrazinothiocarboxylate

ethyl oxycyanoformate