methyl 4-(4-methoxyphenyl)-4-oxobutanoate

methyl 4-anilino-4-oxobutanoate

N-(4-溴苯基)丁二酰亚胺

N-(3-(Methoxycarbonyl)propionyl)-2-(triphenylphosphoranyliden)acetanilid

4-(thien-2-yl)-4-oxobutyric acid methyl ester