2,2-diphenacylindene-1,3-dione

2-phenacyl-3-(1',3'-dioxoindan-2'-ylidene)-indan-1-one

2-phenyl-1H-indeno[1,2-b]pyrrol-4-one

3-phenylindeno[1,2-c]pyridazin-5-one

4-phenyl-2,5-dihydro-1H-indeno[1,2-d][1,3]diazepin-6-one