Xanthene-9-malononitrile

9-dicarboxymethylxanthene

2-tert-butyl-2-phenyl-aziridine

2-tert-butyl-3-(9-xanthenyl)-2-phenylaziridine

9-<3,3-dimethyl-2-phenyl-2-(4-tolylsulfonamido)butyl>xanthene