4-[9-(4-carboxyphenyl)fluoren-9-yl]benzoic acid

4-[9-(4-carbonochloridoylphenyl)fluoren-9-yl]benzoyl chloride

9-hydroxy-9-(4-anisyl)-fluorene

9-(4-methylphenyl)fluoren-9-ol

9-[(4-fluorophenyl)methylidene]fluorene