2,4-dioxo-6-phenyl-1H-pyrimidine-5-carbonitrile

2-甲酰基戊-4-烯酸乙酯

4-amino-1-aza-3-thiatricyclo[5.2.2.02,6]undeca-2(6),4-diene-5-carboxylic acid ethyl ester

2-氰基-2-(3,4-二甲氧基苯基)乙酸乙酯

2-甲氧基-4,6-二甲基烟酸乙酯