1,3-Indandione, 2-(3-oxo-1-indanylidene)- 1707-95-5 1H-Indene-1,3(2H)-dione, 2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)- Anhydrobis(indandione) Bindon Bindone NSC26216 [.DELTA.1,2'-Biindan]-1',3,3'-trione