2-[[3-(1-benzofuran-2-yl)-3,4-dihydro-2H-pyrrol-5-yl]amino]ethanol

diethyl 2-[1-(1-benzofuran-2-yl)-2-nitroethyl]propanedioate

diethyl 2-(1-benzofuran-2-ylmethylidene)propanedioate

4-(1-benzofuran-2-yl)-2-oxopyrrolidine-3-carboxylic acid

ethyl 4-(1-benzofuran-2-yl)-2-oxopyrrolidine-3-carboxylate