4,4'-DICHLOROBUTYROPHENONE

4,4'-Dichlorodiphenyldisulfimide

Bis(4-fluorophenyl)-methanone

4,4'-Diisothiocyanatodihydrostilbene-2,2'-disulfonicaciddisodiumsalt

4,4'-Dimethoxybenzophenone

4,4-Dimethyl-1-phenyl-3-pyrazolidone

4,4'-Dinitrostilbene-2,2'-disulfonic acid

4,4'-Diphenoxybenzophenone

4',4''(5'')-DI-TERT-BUTYLDIBENZO-18-CROWN-6