2-氨基吡唑并[1,5-a]嘧啶-3-羧酸乙酯

8-methoxy-2-oxo-2H-1-benzopyran-3-carbonitrile

ethyl 8-methoxy-2-oxochromene-3-carboxylate

4-氰基四氢-2H-吡喃-4-羧酸乙酯

2-氰基-3-(1,3-苯并二噁茂-5-基)丙烯酸乙脂