11H-isoindolo[2,1-a]benzimidazole

6-amino-3-benzylidene-2-benzofuran-1-one

3-oxo-1H-2-benzofuran-1-carboxylic acid

2-bromo-2-(4-chlorophenyl)indene-1,3-dione

spiro[2-benzofuran-3,1'-cyclopentane]-1-one