3-(3-oxobutan-2-ylidene)-2-benzofuran-1-one

3-(4-methylphenyl)-3H-2-benzofuran-1-one

5,6,11b,12-Tetrahydro-6a,12-diaza-indeno[1,2-a]fluoren-7-one

3-(1,3-dimethylindol-2-yl)-3H-2-benzofuran-1-one

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