1-methyl-4-(1-phenylethenyl)benzene

2-phenylspiro[cyclopropane-1,9'-fluorene]

N-(fluoren-9-ylideneamino)fluoren-9-imine

9-(2,2-dichloroethylidene)fluorene

(2S,3R)-2,3-dichlorospiro[cyclopropane-1,9'-fluorene]