10a,11a-dihydro-5H-spiro[benzo[a]diindeno[1,2-e:1',2'-g]azulene-11,2'-indene]-1',3',5,10,16-pentaone

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

2-(苯基亚甲基)茚-1,3-二酮

1,1,3,3-tetramethyl-2H-indene

2-(2,2-dimethylpenta-3,4-dienylidene)indene-1,3-dione