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

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

9-(2,2-dichloroethylidene)fluorene

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

trans-2,3-dichlorospiro(cyclopropane-1,9'-(9H)fluorene)