2-(二氰基亚甲基)茚-1,3-二酮

2,2-diphenylindene-1,3-dione

2-hydroxy-2-phenyl-2H-indene-1,3-dione

2-甲氧基-1,4-萘醌

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