9H,9'H-[9,9'-bifluoren]-9-yl 4-nitrobenzoate

9H,9'H-[9,9'-bifluoren]-9-yl 4-chlorobenzoate

9-(9'H-fluoren-9'-ylidene)-9H-xanthene

spiro[9H-fluorene-9,3'(10'bH)-fluoreno[9,1-cd][1,2]dithiin]

9,9'-Bis-(S-p-tolylthio)-difluorenyl