9,9-bis[4-(4-nitrophenoxy)phenyl]fluorene

9,9-bis[4-(4-nitro-3-phenylmethoxyphenoxy)phenyl]fluorene

9,9-双(4-溴苯基)芴

9,9-bis(4-methoxyphenyl)fluorene

9,9-bis(4-prop-2-ynoxyphenyl)fluorene