双茚二酮

2,2''-benzylidene-bis-[1,2']biindenylidene-3,1',3'-trione

2-amino-4-phenylindeno[1,2-d]pyrimidin-5-one

3,4-diphenyl-1H-indeno[1,2-b]pyridine-2,5-dione

2,3,4-triphenylindeno[1,2-b]pyridin-5-one