乙基4-氧代庚酸酯

ethyl 4-(2-iodoanilino)-4-oxobut-2-enoate

ethyl 4-oxo-4-(2-oxo-1,3-oxazolidin-3-yl)but-2-enoate

富马酸单乙酯酰氯

丁二酸单乙酯酰氯