5-(2-羟基苯基)-呋喃-2-羧酸

呋喃-5-磺酸-2-甲酸

5-氨基磺酰基-2-糠酰胺

(4-methyl-2-oxochromen-7-yl) furan-2-carboxylate

3,4-bis(trifluoromethyl)furan