diethyl 2-(2-nitrophenoxy)propanedioate

diethyl 2-[1-(4-methoxyphenyl)ethylidene]propanedioate

3-甲基萘并[1,2-b]呋喃-2-羧酸

diethyl 2-(methylamino)propanedioate

bis-(4-nitro-phenoxy)-malonic acid diethyl ester