9-芴酮

3',4',4'-triphenylfluorene-9-spiro-2'-oxazolidin-5'-one

4'-cyano-3'-phenyl-4'-t-butylfluorene-9-spiro-2'-oxazolidin-5'-one

4'-tert-butyl-5'-oxo-3'-methylspirofluorene-9,2'-isoxazolidine-4'-carbonitrile

(fluoren-9-ylideneamino) N-phenylcarbamate