6-hydroxy-4,7-dimethoxy-1-benzofuran-5-carboxylic acid

6-acetyl-4,9-dimethoxy-7-methylfuro[3,2-g]chromen-5-one

9-ethoxy-4-hydroxy-7-methylfuro[3,2-g]chromen-5-one

4,9-二乙氧基-7-甲基呋喃[3,2-g]色烯-5-酮

methyl 6-hydroxy-4,7-dimethoxy-1-benzofuran-5-carboxylate