11-phenylbenzo[a]fluorene

5,10-diphenyl-5,10-dihydro-indeno[2,1-a]indene

2-benzhydryl-3-phenyl-inden-1-one

4-phenyl-1,2,3,4-tetrahydro-naphthalene-1,2-dicarboxylic acid

4-(1-oxo-3-phenyl-inden-2-yl)-benzenesulfonic acid , sodium-salt