287107-30-6
3-[Diazo(methoxycarbonyl)methyl]benzofuran-2-carboxylic acid methyl ester
76268-16-1
2-carboxybenzofuran-3-acetic anhydride

76397-57-4
1H-Pyrano<3,4-b>benzofuran-1-on

76397-63-2
Benzofuro<2,3-c>pyridin-1(2H)-on

76397-56-3
1-Oxo-1H-pyrano<3,4-b>benzofuran-3-carbonsaure