4,4'-二甲基二苯甲酮

4,4'-dimethylthiobenzophenone S-oxide

3-phenylspiro[azirine-2,9'-fluorene]

3',3'-bis(4-methylphenyl)spiro[fluorene-9,2'-thiirane]

3'-phenyldispiro[fluorene-9,4'-isothiazole-5',9''-fluorene] 1',1'-dioxide