methyl 5-(2-methylbutan-2-yl)furan-2-carboxylate

methyl 5-(5-methylfuran-2-carbonyl)furan-2-carboxylate

5-(4-硝基苯基)呋喃-2-羧酸甲酯

5-(4-甲基苯基)呋喃-2-羧酸甲酯

5-(4-甲氧基苯基)呋喃-2-羧酸甲酯